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• How do I make time?

  - by SystemNetworks

  I wanted to output a text for a certain amount of time. One way is to use threads. Are there any other ways? I can't use threads for slick2d. This is my code when I use threads for slick: package javagame; import org.newdawn.slick.GameContainer; import org.newdawn.slick.Graphics; import org.newdawn.slick.Image; import java.util.Random; import org.newdawn.slick.Input; import org.newdawn.slick.*; import org.newdawn.slick.state.*; import org.lwjgl.input.Mouse; public class thread1 implements Runnable { String showUp; int timeLeft; public thread1(String s) { s = showUp; } public void run(Graphics g) { try { g.drawString("%s is sleeping %d", 500, 500); Thread.sleep(timeLeft); g.drawString("%s is awake", 600,600); } catch(Exception e) { } } @Override public void run() { // TODO Auto-generated method stub run(); } } It auto generates a new run() And also when I call it to my main class it has stack overflow!

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• Nvidia dual monitor configuration gets lost every time I reboot

  - by sunwukung

  I've recently updated (well, borked then completely reinstalled) to 12.04. I'm running a dual monitor setup, with a Dell U2410 / Dell 2007WFP combination on an HP Elite Book 8560W. The graphics card is an NVIDIA GF108 [Quadro 1000M]. My problem is as follows. I can get the dual monitor setup working fine, but every time I reboot, my machine appears to lose the settings (specifically, the U2410 is disabled, the mouse pointer is locked in the launcher). I have to restate the settings after every launch. I've tried running nvidia-settings as sudo, I've save the changes to my xorg.conf file (see below) but nothing seems to be sticking. Has anyone had similair issues, or know of a fix? Conf file follows: # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 295.33 (buildd@allspice) Fri Mar 30 15:25:24 UTC 2012 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "DELL 2007WFP" HorizSync 30.0 - 83.0 VertRefresh 56.0 - 76.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "Quadro 1000M" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "1" Option "TwinViewXineramaInfoOrder" "DFP-1" Option "metamodes" "CRT: 1680x1050 +1920+0, DFP-1: 1920x1200 +0+0; CRT: nvidia-auto-select +0+0, DFP-1: NULL" SubSection "Display" Depth 24 EndSubSection EndSection The error message I'm getting is this: none of the selected modes were compatible with the possible modes: Trying modes for CRTC 642: CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 0) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1) CRTC 642: trying mode 3600x1080@50hz with output at 1280 x 1024@0Hz (pass 1)

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• Cat 6 Only 100mbit speed

  - by Stu2000

  I tried two different cat6 cables directly connected between my two ubuntu machines. This one I ordered online: http://www.amazon.co.uk/gp/product/B002SQPDXS/ref=wms_ohs_product only achieves 100mbit speeds, but does appear to be supporting cross-talk (direct pc to pc), the other cat 6 cable, worked perfectly and gets the full 1gigabit speed. Both tests were performed using ftp and checking the network monitor with direct pc to pc connection. Did the product from amazon lie to me or do I need to manually set a setting somewhere in ubuntu for some cables? I had thought 10 quid for 20m of gigabit ethernet cable was a bit cheap, you get what you pay for... Regards, Stu Update: It seems that after rebooting, the device is set to 1000mbit sec when looking it up with sudo ethtool eth0 However after a while, this will drop down to just 100, after which to reset it to 1000 again, I have to reboot, and simply unpugging and re-plugging in the cable doesn't do it. I tried setting this in networking config file as suggested here: auto eth0 iface eth0 inet static pre-up /usr/sbin/ethtool -s eth0 speed 1000 duplex full but that resulted in my networking failing to start. Is there a problem with my 'auto-negotiation' or something? Can I manually override a setting to 1000mbit?

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• Struggles to connect to network when using WPA with a BCM43225

  - by pst007x

  When booting my laptop, it will try to connect to my wireless network, however a window keeps popping up asking me for my security password, which has already been saved. I have to keep deleting my network settings, and reconnecting, otherwise it keeps failing to connect. My wireless is set up with a WPA, I do not want to lower my security because of this, but it is a pain and can take me 15mins plus to finally connect. The problem has only become apparent since a fresh install of 11.10. IPV6 disabled. System info: 01:00.0 Ethernet controller: Broadcom Corporation NetLink BCM57780 Gigabit Ethernet PCIe (rev 01) Subsystem: Acer Incorporated [ALI] Device 036d Flags: bus master, fast devsel, latency 0, IRQ 43 Memory at b3400000 (64-bit, non-prefetchable) [size=64K] Capabilities: <access denied> Kernel driver in use: tg3 Kernel modules: tg3 02:00.0 Network controller: Broadcom Corporation BCM43225 802.11b/g/n (rev 01) Subsystem: Broadcom Corporation Device 04da Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at b2400000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: brcmsmac Kernel modules: wl, brcmsmac ADDITIONAL: In terminal I get this: pst007x@pst007x-ubuntu64:~$ nm-applet start ** Message: applet now removed from the notification area ** (nm-applet:2816): DEBUG: old state indicates that this was not a disconnect 0 ** Message: using fallback from indicator to GtkStatusIcon ** Message: applet now embedded in the notification area ** Message: No keyring secrets found for Auto Access 01/802-11-wireless-security; asking user. ** (nm-applet:2816): DEBUG: foo_client_state_changed_cb Note this line: ** Message: No keyring secrets found for Auto Access 01/802-11-wireless-security; asking user. At this point is where I am asked for the password. Please report WPA issues with Ubuntu 11.10 here: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/892727

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• apt-get issue after upgrading to 12.04

  - by user83906

  I have recently upgraded my cluster from 11.10 to 12.04. After the upgrade, I am having trouble running apt-get on the cluster nodes. I can ssh between the nodes (client-to-client; client-to-head; client-to-external etc.). However, sudo apt-get update produces the following errors: Ign http://us.archive.ubuntu.com precise InRelease Ign http://security.ubuntu.com precise-security InRelease Ign http://www.openfoam.org maverick InRelease Ign http://us.archive.ubuntu.com precise-updates InRelease Err http://security.ubuntu.com precise-security Release.gpg Something wicked happened resolving 'security.ubuntu.com:http' (-5 - No address associated with hostname) Err http://www.openfoam.org maverick Release.gpg Something wicked happened resolving 'www.openfoam.org:http' (-5 - No address associated with hostname) Ign http://us.archive.ubuntu.com precise-backports InRelease Ign http://www.openfoam.org maverick Release Ign http://security.ubuntu.com precise-security Release Err http://us.archive.ubuntu.com precise Release.gpg Something wicked happened resolving 'us.archive.ubuntu.com:http' (-5 - No address associated with hostname) Ign http://security.ubuntu.com precise-security/main Sources/DiffIndex Err http://us.archive.ubuntu.com precise-updates Release.gpg Something wicked happened resolving 'us.archive.ubuntu.com:http' (-5 - No address associated with hostname) Ign http://security.ubuntu.com precise-security/restricted Sources/DiffIndex 15% [Connecting to us.archive.ubuntu.com] [Connecting to security.ubuntu.com] [Connecting to www.openfoam.org] On the headnode, I have in /etc/network/iterfaces: auto eth0 iface eth0 inet static address 192.168.0.1/24 On the client nodes, I have /etc/network/iterfaces: auto eth0 iface eth0 inet static address 192.168.0.101 netmask 255.255.255.0 gateway 192.168.0.1 Please advise.

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• Ubuntu 12.04 Server ping gateway responds with destination host unreachable

  - by blckblttkd

  I consider myself fairly avid with Ubuntu and Linux, but this one has me stumped. I built up a Xen Server using Ubuntu 12.04 as the base operating system. It has multiple domUs running on it. My home network has a statically defined network where I got all the network connectivity going peachy. The server was moved to a permanent home this morning. So, the network configuration on the main system had to change. Again, another static network, but now I can't ping the upstream gateway from the host. As the VMs use this NIC over a bridge, they too are broken. Ping responds with "destination host unreachable." I simplified the networking down to a simple static network as seen below (no bridge or anything) just to get it to work. Here's the contents of my /etc/network/interfaces file: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 216.7.188.228 gateway 216.7.188.225 netmask 255.255.255.240 broadcast 216.7.188.255 network 216.7.188.0 dns-nameservers 8.8.8.8 8.8.4.4 Here's the contents of route -n 0.0.0.0 216.7.188.225 0.0.0.0 UG 100 0 0 eth0 216.7.188.224 0.0.0.0 255.255.255.240 U 0 0 0 eth0 And the results of pinging the gateway: PING 216.7.188.225 (216.7.188.225) 56(84) bytes of data. From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable From 216.7.188.228 icmp_seq=1 Destination Host Unreachable Again, this worked in one network flawlessly (obviously with different parameters in the interfaces file). I did try using eth1 (as there are two NICS on the server (in case the MAC address got flipped on bootup). No success there. Yes, the cable is in the right port now :) Any thoughts? I appreciate the help!

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• How to connect to a wireless network that has a two word name with a space?

  - by grinan

  Ok, I have searched for some time in earnest for an answer to this question. I have a Beagleboard which has Ubuntu 10.10 Minimal install for Arm running on it. With the default install, minimal tools, no GUI, I am unable to connect to my wireless network. The name of my network is "MYNAME NETWORK". Using a text editor to edit /etc/network/interfaces I can not seem to connect at all. As an experiment, I connected to a friends network, which has a one word name "dystek",and was able to connect with Zero issues, and update and install a full GUI for ubuntu Arm. The problem is that I don't want a full blown gui on the beagleboard, just a minimal install of ubuntu with CLI is all I need or want. Is there anyway to connect to my wireless network via editing the /etc/network/interfaces file. Surely there is... I just don't know how. Right now my interfaces file looks like this: auto lo iface lo inet loopback auto wlan0 iface wlan0 inet static address 192.168.1.200 netmask 255.255.255.0 gateway 192.168.1.1 wireless-essid BARRETT NETWORK wireless-key 46456xxxxxxxx Any help would be appreciated.

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• How do I stop sound coming from my speakers with a faulty headphone socket?

  - by Andy

  On my laptop, I have a faulty headphone socket, so when I insert headphones into it, the speakers do not mute. I can confirm that this problem is caused by faulty hardware and not software as when I twist the headphone jack, the speakers come on and off according to the movements. On previous versions of Ubuntu, I worked around this problem by going into alsamixer and disabling "Auto-Mute Mode", and then going into the sound settings and choosing "Analog Headphones". However, on 12.04, no such option exists, rendering my headphones unusable with no way to work around the problem. I momentarily thought I had this problem fixed when I installed PulseAudio Volume Control from the Software Centre. I selected the Output Devices tab, and under "Built-in Audio Analogue Stereo" I selected "Headphones" for the port. However, this almost randomly seems to change back to "Speakers", despite me setting "Auto-Mute Mode" as disabled. Basically, I would like a way to permanently mute the speakers so only the headphones will play sound, without it losing my settings. It is ridiculous that such a simple setting has been taken away to "simplify" the user interface.

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• Finding the shorter turning direction towards a target

  - by A.B.

  I'm trying to implement a type of movement where the object gradually faces the target. The problem I've run into is figuring out which turning direction is faster. The following code works until the object's orientation crosses the -PI or PI threshold, at which point it will start turning into the opposite direction void moveToPoint(sf::Vector2f destination) { if (destination == position) return; auto distance = distanceBetweenPoints(position, destination); auto direction = angleBetweenPoints(position, destination); /// Decides whether incrementing or decrementing orientation is faster /// the next line is the problem if (atan2(sin(direction - rotation), cos(direction - rotation)) > 0 ) { /// Increment rotation rotation += rotation_speed; } else { /// Decrement rotation rotation -= rotation_speed; } if (distance < movement_speed) { position = destination; } else { position.x = position.x + movement_speed*cos(rotation); position.y = position.y + movement_speed*sin(rotation); } updateGraphics(); } 'rotation' and 'rotation_speed' are implemented as custom data type for radians which cannot have values lower than -PI and greater than PI. Any excess or deficit "wraps around". For example, -3.2 becomes ~3.08.

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• Automated testing tool development challenges (for embedded software)

  - by Karthi prime

  My boss want to come up with the proposal for the following tool: An IDE: Able to build, compile, debug, via JTAG programming for the micro-controller. A Test Suite, reads the code in the IDE, auto generates the test cases, and it gives the in-target unit testing results(which is done by controlling code execution in the micro-controller via IDE). A no-overhead code coverage tool which interacts with the test suite and IDE. My work is to obtain the high level architecture of this tool, so as to proceed further. My current knowledge: There are tool-chains available from the chip manufacturer for the micro-controllers which can be utilized along with an open-source IDE like Eclipse, and along with an open-source burner, a complete IDE for a micro-controller can be done. Test cases can be auto-generated by reading the source file through the process of parsing, scripting, based on keywords. Test suite must be able to command the IDE to control, through breakpoints, and read the register contents from the microcontroller - This enables the in-target unit testing. An no-overhead code coverage should be done by no-overhead code instrumentation so as to execute those in the resource constraint environment of the micro-controller. I have the following questions: Any advice on the validity of my understanding? What are the challenges I will have during the development? What are the helpful open-source tools regarding this? What is the development time for this software? Thanks

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• nvidia: switching dvi socket

  - by lurscher

  I have Ubuntu 10.10 x86_64 with Nvidia 9800 gt and Nvidia driver version 270.41.06 My video card has two DVI sockets, but I only use the single monitor configuration. Now, I think the main DVI socket might be busted, so I want to try to enable the other as the main one, however, I don't know how to achieve that. I tried just plugging the monitor in that socket but it won't auto-detect it (it would have been way too easy to just work). This is my xorg.conf: Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: builtin, VertRefresh source: builtin Identifier "Monitor0" VendorName "Unknown" ModelName "AOC" HorizSync 31.5 - 84.7 VertRefresh 60.0 - 78.0 ModeLine "1080p" 172.8 1920 2040 2248 2576 1080 1081 1084 1118 -hsync +vsync Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 9800 GT" EndSection Section "Screen" # Removed Option "metamodes" "1024x768 +0+0" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "CustomEDID" "CRT-0:/home/charlesq/lg.bin" Option "TVStandard" "HD1080p" Option "TwinView" "0" Option "TwinViewXineramaInfoOrder" "CRT-0" Option "metamodes" "1080p +0+0" SubSection "Display" Depth 24 EndSubSection EndSection

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• 12.10 Wireless hotspot configuration and internet browsing - question

  - by Indian

  In our campus we have a leased line connection from a service provider, which has an external IP W.X.Y.Z. This connection is distributed from the server several sub-networks / subnets as follows: Faculty: 172.33....../ 255.255.0.0 Administration: 172.34......./255.255.255.0 Students: 172.35...../255.255.216.0 A student has a laptop with a fixed IP address 172.35.23.123 / 255.255.216.0 where the IP address is on the ethernet port. The gateways for internet access are 172.31.1.1 and 172.31.1.2. Further the student has a wireless port which is inaccessible in the hostel area. The OS of the student is Ubuntu 12.10. The student in the possession of an android phone on which he wishes to install specific software and therefore wishes to activate the internet therein. The student has already attempted the Wireless hotspot solution which works for 12.04 but has not been successful. Various instructions on the internet have helped the student to do the following Installation of dhcp server and hostapd: sudo apt-get install isc-dhcp-server sudo apt-get install hostapd File: /etc/network/interfaces auto lo iface lo inet loopback auto wlan0 iface wlan0 inet static address 10.10.0.1 netmask 255.255.255.0 dns-nameservers 172.31.1.1 172.31.1.2 File: /etc/dhcp/dhcpd.conf subnet 10.10.0.0 netmask 255.255.255.0 { range 10.10.0.2 10.10.0.4; option routers 10.10.0.1; option domain-name-servers 172.31.1.1 172.31.1.2; default-lease-time 6000; max-lease-time 72000; } File: /etc/hostapd/hostapd.conf interface=wlan0 driver=nl80211 ssid=my_hotspot channel=1 hw_mode=g auth_algs=1 wpa=3 wpa_passphrase=1234567890 wpa_key_mgmt=WPA-PSK wpa_pairwise=TKIP CCMP rsn_pairwise=CCMP File: /etc/default/hostapd RUN_DAEMON=”yes” DAEMON_CONF=”/etc/hostapd/hostapd.conf” DAEMON_OPTS=”-dd” File: /etc/default/isc-dhcp-server INTERFACES=”wlan0” File: /etc/rc.local iptables -t nat -A POSTROUTING -s 10.10.0.0/16 -o eth0 -j MASQUERADE exit 0 After all the configuration, the computer is restarted. The student can see that the hotspot named “my_hotspot” is available. The hotspot also awards an address to the android phone. The student will now be able to browse the internet.

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• A "tinkered" PC can ping by IP, not by hostname. How to fix?

  - by aitchnyu

  Like this: root@tis-server:~# ping www.google.com ping: unknown host www.google.com root@tis-server:~# ping 8.8.8.8 PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data. 64 bytes from 8.8.8.8: icmp_req=1 ttl=55 time=50.3 ms 64 bytes from 8.8.8.8: icmp_req=2 ttl=55 time=65.4 ms It was tinkered by somebody else and I (and him!) cant trace his actions. The graphical connection manager also refuses to work thanks to the tinkering. It also makes route add default gw 192.168.0.1 necessary for each reboot to atleast ping by IP. How do I fix this? It is Ubuntu 11.10 As requested: Output of ifconfig: eth0 Link encap:Ethernet HWaddr 48:5b:39:ae:21:98 inet addr:192.168.0.100 Bcast:0.0.0.0 Mask:255.255.255.0 inet6 addr: fe80::4a5b:39ff:feae:2198/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:13194 errors:0 dropped:0 overruns:0 frame:0 TX packets:5156 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:1420596 (1.4 MB) TX bytes:827295 (827.2 KB) Interrupt:42 Base address:0x2000 lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:16436 Metric:1 RX packets:4817 errors:0 dropped:0 overruns:0 frame:0 TX packets:4817 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:377732 (377.7 KB) TX bytes:377732 (377.7 KB) Output of resolv.conf: Output of /etc/network/interfaces: GNU nano 2.2.6 File: /etc/network/interfaces auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.100 netmask 255.255.255.0

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• Network: Incoming connections work, outgoing fails

  - by anirvan

  i recently set up my own server at home to run Ubuntu 12.04 server ed. on booting up, i noticed that a message related to networking comes up, and the booting process pauses. the message read something like - waiting for network configuration and after a while - waiting another 60 seconds... on booting up, I realised that any command which requires a network connection was not working - ping, apt-get install, etc. on firing the ifup eth0 command, I get the error RTNETLINK answers: File exists. Failed to bring up eth0. I also realised, while searching the web for this problem, that this is probably one of the most common networking related issues - however, most of the questions are around setting up multiple IPs for the same machine. ifdown eth0 also fails, stating that eth0 is not configured. my /etc/network/interfaces file has a simple configuration for a static IP: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address xx.xx.xx.xx netmask xx.xx.xx.xx broadcast xx.xx.xx.xx gateway xx.xx.xx.xx dns-nameservers xx.xx.xx.xx The strangest part of this problem is that, while I can't connect to anything outside, I can ping to this particular server using the static IP configured in the interface file, and, i can even SSH into it! I'm really at ends here with this problem, and any guidance is much appreciated. Thanks!

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• Switching DVI socket

  - by lurscher

  I have Ubuntu 10.10 x86_64 with Nvidia 9800 gt and Nvidia driver version 270.41.06 My video card has two DVI sockets, but I only use the single monitor configuration. Now, I think the main DVI socket might be busted, so I want to try to enable the other as the main one, however, I don't know how to achieve that. I tried just plugging the monitor in that socket but it won't auto-detect it (it would have been way too easy to just work). This is my xorg.conf: Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: builtin, VertRefresh source: builtin Identifier "Monitor0" VendorName "Unknown" ModelName "AOC" HorizSync 31.5 - 84.7 VertRefresh 60.0 - 78.0 ModeLine "1080p" 172.8 1920 2040 2248 2576 1080 1081 1084 1118 -hsync +vsync Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 9800 GT" EndSection Section "Screen" # Removed Option "metamodes" "1024x768 +0+0" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "CustomEDID" "CRT-0:/home/charlesq/lg.bin" Option "TVStandard" "HD1080p" Option "TwinView" "0" Option "TwinViewXineramaInfoOrder" "CRT-0" Option "metamodes" "1080p +0+0" SubSection "Display" Depth 24 EndSubSection EndSection

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• Centring an HTML element relative to its parent when its width is greater than its parent. [closed]

  - by casr

  I mocked up my intended outcome. So the blue element is the main content of the website and the yellow element represents something like a diagram or an image that has a greater width than the blue element. Ideally, I would like a purely CSS solution that is able to deal with various sizes of images. I have tried various things but have failed so far. I hope you can help! Here’s some example markup to set you on your way. <!DOCTYPE HTML> <html> <head> <title>Example</title> <style> #el1 { display: block; margin: 0 auto; width: 30em; background-color: #8cabde } #el2 { /* works when the width is less than the parent */ display: block; margin: 0 auto; } </style> </head> <body> <article id=el1> <p>Some content above.</p> <img id=el2 src=http://i.imgur.com/JFfGG.gif title=spaceball width=600 height=400> <p>Some content below.</p> </article> </body> </html>

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• How do you run XBMC on nvidia dual screen and stop it from taking over the keyboard and mouse?

  - by Paul Swartout

  I have set up dual screen under Ubuntu 12.04. I have a GeForce 8500 GT and have used the nVidia control panel to set up dual screen in "Separate screen mode". Here's the resulting xorg.conf # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 295.33 (buildd@zirconium) Fri Mar 30 13:38:49 UTC 2012 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 Screen 1 "Screen1" RightOf "Screen0" InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "Maxdata/Belinea B1925S1W" HorizSync 31.0 - 83.0 VertRefresh 56.0 - 75.0 Option "DPMS" EndSection Section "Monitor" # HorizSync source: builtin, VertRefresh source: builtin Identifier "Monitor1" VendorName "Unknown" ModelName "CRT-1" HorizSync 28.0 - 55.0 VertRefresh 43.0 - 72.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 8500 GT" BusID "PCI:1:0:0" Screen 0 EndSection Section "Device" Identifier "Device1" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce 8500 GT" BusID "PCI:1:0:0" Screen 1 EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "0" Option "metamodes" "CRT-0: nvidia-auto-select +0+0" SubSection "Display" Depth 24 EndSubSection EndSection Section "Screen" # Removed Option "metamodes" "CRT-1: 1280x768 +0+0" Identifier "Screen1" Device "Device1" Monitor "Monitor1" DefaultDepth 24 Option "TwinView" "0" Option "metamodes" "CRT-1: 1360x768_60 +0+0" SubSection "Display" Depth 24 EndSubSection EndSection All well and good and I have a nice blank XWindow displayed on my TV (the 2nd monitor). I then fire up XBMC from a terminal on the PC monitor using DISPLAY=:0.1 xbmc XBMC fires up quite nicely on the TV however I can no longer use the main PC monitor / mouse / keyboard as XBMC on the TV screen seems to have focus. I was hoping to have XBMC running on the TV and let the kids use the MCE remote whilst I get on with my work on the PC monitor. Does anyone have any idea how to overcome this? I'm presuming there's some xorg.conf fun and games needed but I've no idea where to start to be honest.

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• Error when installing ubuntu-zfs

  - by ubiquibacon

  I'm switching from FreeNAS to Ubuntu 12.04 LTS. After a vanilla install of Ubuntu has been completed I run the following commands in the order shown to install ZFS: apt-get install python-software-properties add-apt-repository ppa:zfs-native/stable apt-get -y -q update && apt-get -y -q upgrade apt-get install ubuntu-zfs When the last command is run ZFS is installed and seems to be working correctly... mostly (more on that later). However, when the last command is run I get this error (full log here): configure: error: *** Please make sure the kmod spl devel <kernel> package for your *** distribution is installed then try again. If that fails you *** can specify the location of the spl objects with the *** '--with-spl-obj=PATH' option. What is this error and how do I fix it? Now I said mostly earlier because my pool's don't auto mount when the server restarts the way they should. All my reading (mostly from this page) indicates that mountall should just take care of the mounting. I have followed the instructions on that page and I cannot get mountall to work correctly. My pools will only auto mount on restart if I edit /etc/fstab or change the ZFS_MOUNT and ZFS_UNMOUNT options in /etc/default/zfs.

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• How to make ip Address static (eth0)

  - by Jordan Angelucci

  I'm having a really hard time configuring ubuntu 13.04 to have a static ip address. I have tried multiple solutions but everytime I reboot (can't do the network reset command because ubuntu freezes) I end up with no connection. Here is what I get when i type ifconfig into the terminal: eth0 Link encap:Ethernet HWaddr 10:bf:48:bc:07:cb inet addr:192.168.0.8 Bcast:192.168.0.255 Mask:255.255.255.0 inet6 addr: fe80::12bf:48ff:febc:7cb/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1763067 errors:0 dropped:0 overruns:0 frame:0 TX packets:1024326 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2284491220 (2.2 GB) TX bytes:136809317 (136.8 MB) lo Link encap:Local Loopback inet addr:127.0.0.1 Mask:255.0.0.0 inet6 addr: ::1/128 Scope:Host UP LOOPBACK RUNNING MTU:65536 Metric:1 RX packets:1840 errors:0 dropped:0 overruns:0 frame:0 TX packets:1840 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:185688 (185.6 KB) TX bytes:185688 (185.6 KB) I have also tried this: auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.0.160 netmask 255.255.255.0 broadcast 192.168.0.255 gateway 192.168.0.1 dns-nameservers 24.222.0.94 dns-nameservers 24.222.0.95 If anyone could help me it would be very much appreciated.

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• Lost connectivity after configuring multiple network adapters on separate networks

  - by Dave Long

  I am trying to setup an Ubuntu hosting server, currently just for development, and the server has two NICs, each sitting on a different network. eth0 is on 192.168.200.* and eth1 is on 192.168.101.* and each one has a static IP. eth0 is the public facing NIC card and eth1 is strictly for internal access to the server. I initially only setup eth0 and added the eth1 card when I needed it. eth0 was working find until I added eth1, now, can't get any connectivity on eth0 unless I pull eth1 out of the box. The configuration on each system is as follows: auto eth0 iface eth0 inet static address 192.168.200.94 netmask 255.255.255.0 network 192.168.200.0 broadcast 192.168.200.255 gateway 192.168.200.253 auto eth1 iface eth1 inet static address 192.168.101.64 netmask 255.255.255.0 network 192.168.101.0 broadcast 192.168.101.255 gateway 192.168.101.254 Again eth0 worked fine until I added eth1. I have seen this happen with Windows servers if you have a Default Gateway setup for both NICs, but I am not sure if this works the same on Ubuntu. My resolv.conf file looks like so: nameserver 192.168.101.59 nameserver 192.168.101.58 domain domain.local search domain.local Per request here is the Routing table 192.168.101.0 * 255.255.255.0 U 0 0 0 eth1 192.168.200.0 * 255.255.255.0 U 0 0 0 eth0 default 192.168.101.254 0.0.0.0 UG 100 0 0 eth1 default 192.168.200.253 0.0.0.0 UG 100 0 0 eth0

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• How to mount drive in /media/userName/ like nautilus do using udisks

  - by Bsienn

  As of my current installation of Ubuntu 13.10 Unity, when i click on a drive in nautilus it get mounted in /media/username/mountedDrive i read that nautilus use udisks to do that. Basically i want to auto mount my drive using udisks in start up using this method But problem is, it mounts the drive in /media/mountedDrive, but i want it the way nautilus do in /media/username/mounteDrive I want NTFS Data drive to be auto mounted at /media/bsienn/ bsienn@bsienn-desktop:~$ blkid /dev/sda1: LABEL="System Reserved" UUID="8230744030743D6B" TYPE="ntfs" /dev/sda2: LABEL="Windows 7" UUID="60100EA5100E81F0" TYPE="ntfs" /dev/sda3: LABEL="Data" UUID="882C04092C03F14C" TYPE="ntfs" /dev/sda5: UUID="8768800f-59e1-41a2-9092-c0a8cb60dabf" TYPE="swap" /dev/sda6: LABEL="Ubuntu Drive" UUID="13ea474a-fb27-4c91-bae7-c45690f88954" TYPE="ext4" /dev/sda7: UUID="69c22e73-9f64-4b48-b854-7b121642cd5d" TYPE="ext4" bsienn@bsienn-desktop:~$ sudo fdisk -l Disk /dev/sda: 160.0 GB, 160000000000 bytes 255 heads, 63 sectors/track, 19452 cylinders, total 312500000 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x8d528d52 Device Boot Start End Blocks Id System /dev/sda1 * 2048 206847 102400 7 HPFS/NTFS/exFAT /dev/sda2 206848 117730069 58761611 7 HPFS/NTFS/exFAT /dev/sda3 158690072 312494116 76902022+ 7 HPFS/NTFS/exFAT /dev/sda4 117731326 158689279 20478977 5 Extended /dev/sda5 137263104 141260799 1998848 82 Linux swap / Solaris /dev/sda6 141262848 158689279 8713216 83 Linux /dev/sda7 117731328 137263103 9765888 83 Linux Partition table entries are not in disk order bsienn@bsienn-desktop:~$ cat /etc/fstab # /etc/fstab: static file system information. # # Use 'blkid' to print the universally unique identifier for a # device; this may be used with UUID= as a more robust way to name devices # that works even if disks are added and removed. See fstab(5). # # <file system> <mount point> <type> <options> <dump> <pass> # / was on /dev/sda7 during installation UUID=69c22e73-9f64-4b48-b854-7b121642cd5d / ext4 errors=remount-ro 0 1 # swap was on /dev/sda5 during installation UUID=8768800f-59e1-41a2-9092-c0a8cb60dabf none swap sw 0 0 Desired effect: Picture link

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• How to set individual NTFS partitions permissions behaviour for each user account?

  - by ryniek

  I have two NTFS partitions (DOWNLOADS for downloaded files and VM for my VirtualBox .vdi file) for which i must have full permissions for my allday use account. They should be also automounting when i login to this account. But i've also set Guest account for guests. For Guest account, i want make VM partition fully disabled and invisible (and thus it mustn't automount) but DOWNLOADS partition should be shared with limited privileges with Guest account. Editing fstab i'm able to share DOWNLOADS partition with Guest on limited privileges but VM can be only set to limited and have disabled automounting - so guest can't mount it but it still can be seen in Nautilus, plus I must always mount it manually when i login to allday account. Is there some trick to make what i want? Here's my fstab config: # /etc/fstab: static file system information. # # <file system> <mount point> <type> <options> <dump> <pass> proc /proc proc nodev,noexec,nosuid 0 0 #Entry for /dev/sda1 : UUID=35e66658-5ee9-40cf-bf56-8204959e3df0 / xfs defaults 01 #Entry for /dev/sda2 : UUID=26c714cf-4236-45e7-9c46-cfcf91a215ae /home xfs defaults 02 #Entry for /dev/sda5 : UUID=1315BCB027C44639 /media/DOWNLOADS ntfs-3g auto,uid=1000,gid=1000,umask=0022,nodev,locale=pl_PL.utf8 0 0 #Entry for /dev/sda6 : UUID=60FF39EB72B72264 /media/VM ntfs noauto,uid=1000,gid=1000,umask=0077,nodev,locale=pl_PL.utf8 0 0 #Entry for /dev/sda7 : UUID=c52411f5-105c-45d1-971f-412f962c350e none swap sw 0 0 /dev/fd0 /media/floppy0 auto rw,user,noauto,exec,utf8 0 0 Thanks

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• Dual Monitor in Ubuntu 11.10 is resetting the theme

  - by Mengu

  i'm experiencing a strange problem with dual monitors. when i set the dual monitor via "nvidia settings" and save the setting to xorg.conf, the default unity theme and icons are turning back to gtk default. i also get an error telling me "could not apply the stored configuration for monitors" here is my xorg.conf: # nvidia-settings: X configuration file generated by nvidia-settings # nvidia-settings: version 280.13 (buildd@yellow) Fri Aug 5 12:31:28 UTC 2011 Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" # generated from default Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" # generated from default Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "Chi Mei Optoelectronics corp." HorizSync 30.0 - 75.0 VertRefresh 60.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GT 540M" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "TwinView" "1" Option "TwinViewXineramaInfoOrder" "DFP-0" Option "metamodes" "DFP: nvidia-auto-select +0+0, CRT: 1680x1050 +1920+0" SubSection "Display" Depth 24 EndSubSection EndSection here is an example of what i'm talking about: http://i.stack.imgur.com/vrlW1.png how can i fix this? thanks in advance.

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• Configuring network to set wlan0 as primary

  - by Sheed

  I recently had to rebuild my pc and decided to go for ubuntu 14.04. I think the mistake I made was I started from a 12.04 install disk instead of the 12.10 disk I'd used previously and when given the option set my primary connection as ethernet (because the wireless option didn't work). After upgrading to 14.04 etc, I managed to get the wireless working, or more using steps like ifconfig -a and the likes I managed to prove that the wireless card etc. is all installed and working. However every time I boot without a hard wired connection plugged in I get the message "waiting for network configuration". I can then once it's booted without a network get my wirless working using sudo ifconfig wlan0 up iwlist wlan0 scan This seems to kick the wireless module into life and it appears in the GUI and I can then select a network, however all the options like edit network and disconnect etc are all greyed out. What I would like of course is if the WLAN0 was just set as my primary default network so I've been looking for a solution to this and it would seem that I need to adjust the old /etc/network/interfaces file but when I try to do so using the sudo vi /etc/network/interfaces command I, well I simply have no idea what I'm doing. Other than that typing :q! gets me out of there before I do to much damage! As far as I can tell (by navigating to the file in the GUI) the output of my /etc/network/interfaces is as follows: (obviously not including the " in each line that's just to break the heading rule of the #) "# This file describes the network interfaces available on your system "# and how to activate them. For more information, see interfaces(5). "# The loopback network interface auto lo iface lo inet loopback "# The primary network interface auto eth0 iface eth0 inet dhcp If this is the case then this clearly doesn't contain what it should do but I don't how to fix it. Nor do I even know if I'm on the right track. Any help would be appreciated thanks :)

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• 12.10 Quantal display issues using nvidiaXineramaInfoOverride

  - by AvatarKava

  After updating to 12.10 today, my xorg.conf doesn't seem to be respected by Quantal. Not sure if this is a 'bug' or whether it's just an adjustment I have to make due to changes in the OS. When logging in, it seems Ubuntu is now recognizing only one 3840x1080 screen named "Matrox" and maximizing windows spans them across both screens. In 12.04, this configuration file successfully allowed me to override the data provided by my TripleHead2Go and maximize windows to a single monitor. Any ideas or where to start on trying to debug this? After a bit of searching, I tried to make changes according to the update here: http://www.phoronix.com/scan.php?page=news_item&px=MTEyMDk Here's where the config file sits currently: Section "ServerLayout" Identifier "Layout0" Screen 0 "Screen0" 0 0 InputDevice "Keyboard0" "CoreKeyboard" InputDevice "Mouse0" "CorePointer" Option "Xinerama" "0" EndSection Section "Files" EndSection Section "InputDevice" Identifier "Mouse0" Driver "mouse" Option "Protocol" "auto" Option "Device" "/dev/psaux" Option "Emulate3Buttons" "no" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" Identifier "Keyboard0" Driver "kbd" EndSection Section "Monitor" # HorizSync source: edid, VertRefresh source: edid Identifier "Monitor0" VendorName "Unknown" ModelName "Matrox" HorizSync 31.5 - 80.0 VertRefresh 59.9 - 75.0 Option "DPMS" EndSection Section "Device" Identifier "Device0" Driver "nvidia" VendorName "NVIDIA Corporation" BoardName "GeForce GTX 260M" EndSection Section "Screen" Identifier "Screen0" Device "Device0" Monitor "Monitor0" DefaultDepth 24 Option "nvidiaXineramaInfo" "true" Option "nvidiaXineramaInfoOrder" "CRT-0" #Option "metamodes" "CRT: nvidia-auto-select +0+0" Option "nvidiaXineramaInfoOverride" "1920x1080 +0+0, 1920x1080 +1920+0" Option "Stereo" "0" SubSection "Display" Depth 24 EndSubSection EndSection

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