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  • Sound works for only one user at a time

    - by Patrick
    I've noticed that sound becomes unavailable to me when someone else is logged into my machine and playing music (or has facebook open) in the other account. I've had to ask them to unlock their account and turn it off so I can get sound in my own stuff. Even in sound preferences, the hardware itself disappears and output is "dummy sound". Is there a way to prevent this from happening? What would be really good is if I could turn down the volume (or mute entirely) all the sounds on all other accounts on a per-user basis from my sound preferences without affecting whatever setting they have - essentially saying whenever user A is logged in, all sounds from user B's account are muted and anything from user C's account is at 50% while I can still have my own at full volume.

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  • Why can't I ping server? VMware set to 'Bridged' loses IP address

    - by Dave
    I have installed a fresh 10.04 server onto a laptop on a home network as a VMware machine and set network connection to 'Bridged: connect directly to the physical network' from within VMware and rebooted the server. It then loses its IP address. dhclient eth0 says "No working leases in persistent database - sleeping" DHCP is working fine on the wi-fi router. The laptop is wired to a wireless router and from there wirelessly to a desktop. Desktop and Laptop can ping each other from Windows. I can ping the VM from Windows on the same laptop, but not from the desktop. Strangely ping has started to resolve hostnames to IPv6 addresses and not IPv4. Don't know whether that's connected? A kick in the right direction would be greatly appreciated. I've been an Ubuntu desktkop user for a few years, but new to ubuntu servers.

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  • How can the maximum number of simultaneous users to log in to Ubuntu server be increased?

    - by nixnotwin
    I use ubuntu server 10.04 on a fairly good machine, with 2.40 duel-core processor and 2GB RAM. My users login with ssh or samba. I have setup LDAP with PAM to sync user accounts between unix and samba. When I allowed about 90 users to login over ssh at once the server refused login for many users. I am using dropbear as ssh server. Even samba logins failed for many users. I need to allow at least 100 users to login at once. Is there anyway to do this?

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  • Why the overhead when allocating objects/arrays in Java?

    - by Gnijuohz
    How many bytes an array occupies in Java? Assume It's a 64bit machine and also assume there are N elements in an array, so all these elements would take up 2*N, 4*N or 8*N bytes for different types of array. And a lecture in Coursera says that it would occupy 2*N+24, 4*N+24 or 8*N+24 bytes for a N element array and the 24 bytes is called overhead, but didn't explain why the overhead is needed. Also objects have overheads, which is 16 bytes. What exactly are these overheads? What are these 24/16 bytes composed of? Also, do these overheads only exist in Java? How about C, C++ and Python?

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  • Friday Fun: E7 (Mission to Save Earth)

    - by Asian Angel
    It has been another long week at work and you should take a few minutes to relax and have some fun. In this week’s game you journey to E7 in an attempt to find and destroy the deadly bomb that is aimed at planet Earth. Can you survive the journey across the planet and complete your mission? Latest Features How-To Geek ETC Learn To Adjust Contrast Like a Pro in Photoshop, GIMP, and Paint.NET Have You Ever Wondered How Your Operating System Got Its Name? Should You Delete Windows 7 Service Pack Backup Files to Save Space? What Can Super Mario Teach Us About Graphics Technology? Windows 7 Service Pack 1 is Released: But Should You Install It? How To Make Hundreds of Complex Photo Edits in Seconds With Photoshop Actions Super-Charge GIMP’s Image Editing Capabilities with G’MIC [Cross-Platform] Access and Manage Your Ubuntu One Account in Chrome and Iron Mouse Over YouTube Previews YouTube Videos in Chrome Watch a Machine Get Upgraded from MS-DOS to Windows 7 [Video] Bring the Whole Ubuntu Gang Home to Your Desktop with this Mascots Wallpaper Hack Apart a Highlighter to Create UV-Reactive Flowers [Science]

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  • How can I run samba?

    - by depesz
    I have server running Ubuntu 10.10. Never used samba before, as I never had windows machines, but now I need it. So I did: apt-get install samba smbfs smbclient. Packages are installed, but I have no idea how to configure it. All howtos I found on the net relate to /etc/samba/something.conf, where I don't even have /etc/samba directory. The only config I found is /etc/default/samba, which contains (aside from comments) only: RUN_MODE="daemons" All I want is to be able to have access to some directories on the Ubuntu machine from Windows, nothing else.

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  • Developing a computer system based on Nand2Tetris [on hold]

    - by Ryan
    I recently finished a book called Nand2Tetris (nand2tetris.org) where I built my own computer system from scratch with its own machine language, assembly code, and a high level language called Jack that's translated to Hack binary. However, I feel like the "computer" I built throughout the course of this book (called the Hack computer) is a bit too simple for various reasons: 1) There are only two registers (D and A), whereas most computers have much more 2) Peripheral devices like mouse and keyboard have to be directly implemented 3) Peripheral devices use a pre-planned shared memory map to communicate with the CPU instead of using interrupts (which aren't covered at all) 4) Jack (the high level language) code doesn't compile to Assembly code directly, instead it compiles to an intermediate language, which in turn gets translated to Assembly. 5) There is no ROM or permanent storage device, everything is stored in RAM 6) No support for colored monitor, networking or sound I would like to build a more complicated computer system now based on what I've learned from Nand2Tetris. Does anyone know of any good resources or books to get started on this? (BTW by computer system I mean software that can emulate the hardware of a virtual computer with its own unique instruction set)

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  • Ubuntu partitions on Dell XPS13

    - by Francois
    I bought a Dell XPS13 with ubuntu 12.04 pre-installed. I want to reformat and repartition the machine but as I'm far from being a linux guru, I'm afraid to erase something important that could have been preinstalled by Dell. On the disk, there are 3 partitions: /dev/sda1 - Ext4 Linux bootable 248GB - witch is the system+user partition I guess, /dev/sda2 - Extended (?) of 8GB - What is this partion about? /dev/sda5 - Linux Swap of 8GB - whitch is for RAM and need to be reconduct (why only 1xRAM and not 2?) Do I have to care about /dev/sda2 ? According to you can I reformat to create a partition for /home whitout losing anything important (except user data of course) ? Thank you for your help

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  • Ubuntu Suspend won't wake by mouse

    - by corsen
    I just installed Ubuntu 11.04 and realized that suspend would not wake by either keyboard or mouse. After following instructions from here: http://ubuntuforums.org/showthread.php?t=1642817 The system will now wake by keyboard. I have a USB mouse it is a logitech G5. Even if I enable all of the USB devices listed in /proc/acpi/wakeup, my computer will still not wake up via mouse. I'd really prefer to wake by mouse instead of keyboard due to cats. Does anyone know why my mouse won't wake the machine even after enabling all USB devices listed? Thanks, Bryan

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  • Windows 8 and Ubuntu 12.10 dual boot

    - by Marty
    I have been having a tough time getting a new computer (Lenovo h430) that came with windows 8 to dual boot with ubuntu linux. I can get ubuntu to install from a usb drive and can use the live system (ubuntu 12.10) but dual booting has not worked. I have cruised the internet and tried a number of solutions such as easybcd 2.2 and boot repair under linux. I have also gone into the setup screen to try and fix it but the lenovo acromyms in the setup are not illuminating for me. Does anyone know of a clear set of instructions for installing ubuntu on a machine delivered with windows 8 ?

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  • Unable to login following permission changes in device manager (11.10 + Gnome)

    - by Symanuk
    (Running Gnome 3 on Ubuntu 11.10) Everything working well (at least a couple of months), until recently when I changed the permissions through the device manager on the sda1 /2/ 3 drives, thinking it would save all the switching I seem to have to do between users in order to see / use files I previously copied across from an external drive. Now when I boot up the Ubuntu splash screen loads indefinitely, and if I go in through the GRUB / recover option, i'm getting a load of negative permission messages back (regardless of using the fsck or remount options) Either way = unusable machine (Laptop Dell Inspiron n5050), and no way through to login. I'm looking for: (1) a way back in so any help greatfully received (answers need to be pretty basic as i'm a novice), and (2) if i'm to learn anything, a decent thread on setting permissions within Ubuntu / Gnome 3. I'm new to both Ubuntu & Linux, so please be gentle!! Cheers

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  • What ports should I open for listen and/or transmit in my firewall to keep internet ok?

    - by H_7
    What are the minimum ports and services that should I allow/open for listen and/or transmit in my firewall (I am using Firestarter) to keep my internet running ok? Some talk about what services, which port uses, and why it matters should be nice too. Thanks for any advice. I have some bet to the answer 80 http 443 https 53 dns EDIT: I will just browse some sites. I have a windows virtual machine, so I ll use it too, bu t just normal navigation too. No torrents, IRC's, FLASH, etc.. Thanks for attention. hmmm... lost! Linux Mint 9 here.

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  • How do I handle "Firmware file X not found" stopping bootup?

    - by John Baber
    I recently upgraded my desktop mac to Precise and now can't get past the Ubuntu 12.04 splash page. The splash freezes with [ 19.931097] b32-phy0 ERROR: Firmware file "b43/ucode16_mimo.fw" not found [ 19.9311126] b32-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all instructions on this website. written on it This is when I choose 3.2.0-generic from the grub menu. If I choose to load up older kernels, I still get the same thing. How can I make my computer finish booting again? I'm able to ssh into the machine and poke around, but the actual screen freezes at the splash.

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  • The Truth About Wi-Fi Signal Strength

    - by Jason Fitzpatrick
    Whether it’s the structural layout of your home or just ghosts in the machine, we’re all familiar with inexplicable Wi-Fi dead spots. One extra puzzling situation, unseen in the comic here, is when the addition of another wireless node actually causes issues with your Wi-Fi connectivity. There’s nothing more frustrating than having twice the Wi-Fi node power and half the actual signal at your laptop. If you’re looking to extend your Wi-Fi network coverage headache free, check out our guides to doing so with Tomato-powered routers and DD-WRT-powered routers. Your Wireless Internet Signal Strength [via FailDesk] How to Factory Reset Your Android Phone or Tablet When It Won’t Boot Our Geek Trivia App for Windows 8 is Now Available Everywhere How To Boot Your Android Phone or Tablet Into Safe Mode

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  • How do I install xulrunner in 12.04?

    - by chessplayer
    I am trying to migrate a virtual machine I use for my classes at the university from 10.04 to 12.04 and in that I am using xulrunner so that first, I can have SQLiteManager as a stand alone app next, KNIME can provide help for its nodes I tried adding the the mozilla ppa as described in some posts, e.g. here or here, but when I search for xulrunner in Synaptic I get no match. I read in this link, that xulrunner was left out intentionally, which, frankly, I think is a bad decision! Anyway, does anyone know a way out of this, i.e. how to get xulrunner for 12.04? Any help appreciated!

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  • Keeping rackspace vserver alive

    - by mit
    It appears to me that rackspace somehow freezes cloud VMs after some idle time. This means the first page request to a php page takes much longer to respond than the subsequent requests. This is in some cases good, in other cases not acceptable. I am actually querying a machine with wget from a different host now to keep it "alive". But I wonder what frequency would be necessary. Does anyone know the time period after which they send a VM to "sleep"? I guess it would be some minutes. EDIT: There is absolutely no caching involved on the php site. It just recently moved from another vhost and there was never such latency on the first request.

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  • dnsmasq not running

    - by Yevgeniy M.
    i installed ubuntu 12.04 on a netbook with 16GB SSD. To keep the installation small i used the mini.iso i got from here. Everything worked fine, but i noticed that dnsmasq does not get started by NetworkManager. On a different machine i installed 12.04 from a regular iso and netstat shows dnsmasq running and listening on port 53. NetworkManager.conf look identically on both systems. The line dns=dnsmasq is present. Although i do not really need dnsmasq - name resolution works fine without - i would like to know the reason why dnsmasq is running on one system, but does not run on the other and how i could adjust this behavior. Thx in advance!

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  • How can I configure updates in a CMS like WordPress?

    - by Varsha
    I have a CMS built in core PHP. Till now, if a new version is released, it is downloaded to client machine in zipped form. And then client has to manually unzip the folder and copy that to required location. Because there is no way to download zip file to required location. I want that CMS should be updated in the background like-WordPress. In other words, I want that new version can replace old version. How can I do this?

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  • No enable mobile broadband option

    - by noboot
    I just migrated from Wubi to actual dual booting Ubuntu and Windows 7 my machine is an Aspire 4750G. When I had (Wubi) Ubuntu 12.04 LTS 64-bit the network applet included the "enable mobile broadband" option. Now, I am using Ubuntu 12.04 LTS (32-bit) actual install as the 64-bit does not work. And my problem is that it does not show the "enable mobile broadband" option. This is so weird considering that I did not encounter the same problem in Wubi based installation.. Kindly help.. I have managed to connect to the internet via Sakis3G Script, still I find the previous method a lot more convenient..

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  • Information about SATA, IDE (PATA) controllers

    - by Adam Matan
    I have a remote computer on which I want to install a new hard drive for rsync backup. The problem is, I don't know what controller technology is used (PATA, SATA, SATA2, ...) and how many available slots are left. I want to spare me an unnecessary drive just for opening the chassis and looking into wires. How do I query the SATA or PATA controllers? I'm interested in the following points: Which controllers exist in the machine How many (and which) disks are attached to each controller How many available slots are there

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  • Incorrect key mappings in remote NX session

    - by Roger Light
    I'm using the NoMachine provided NX client on Ubuntu 10.10 running on a laptop. I'm connecting to a FreeNX server that happens to be running on openSUSE. I'm having trouble with keys being incorrect in the remote session. The most noticable example is that when I press up cursor, the screen shot dialog appears instead. As far as I can gather easily, the cursor keys and delete are affected. It's worth noting that it doesn't display the same behaviour if I dual boot to Windows XP, or from a different machine using openSUSE. I'm not really sure where to begin looking. Any suggestions?

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  • Lubuntu 12.04 is a non-LTS release - does this mean that LXDE isn't, either?

    - by MHC
    Lubuntu 12.04 is not a long-term-support release. That's mostly due to a lack of manpower. But I don't use Lubuntu on my machine, I use LXDE over stock Ubuntu 12.04 LTS. So my question is: In the next five years, will there be security updates and bug fixes for LXDE-packages such as Openbox, PCmanFM and LXsession? Or does the "LTS" in 12.04 LTS only include stock Unity packages? I guess this question is just as relevant for any other DE out there.

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  • "Unable to mount location. Failed to mount Windows share" error when trying to share folders

    - by paulus_almighty
    I have two Ubuntu machines both on 11.10 I want to share folders from one to the other. If, on the server machine, (in Nautilus) I right click on the folders and click Properties Share Share this folder Create share. Then on the client I'm prompted for a username and password. My username and password does not work. If I select "Guest access" check box then I get "Unable to mount location. Failed to mount Windows share" This should be straightforward, right?

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  • Problems installing 13.10 inside VMWare Player 4

    - by Thomas S.
    In the past I had no problems installing Ubuntu 12.04 inside VMWare Player 4.0.4 on my Windows 7 Pro machine. Now I installed Ubuntu 13.10 and have a couple of problems: the default screensize (even during the installation) is gigantic I've told Ubuntu to automatically login - after reboot the gigantic screen occurs without showing anything, without doing anything on mouse clicks, Ctrl+Alt+Backspace does not work switching to console using Ctrl+Alt+F1...F6 works, but is incredible slow invoking 'sudo reboot now' does not succeed, it prints Killing all remining processes... [fail] Restoring resolver state... [ OK ] Will now switch to single-user mode root@ubuntu1310:~# invoking now 'shutdown now' will soon show the same error. What I need to do to get Ubuntu 13.10 up and running in VMWare Player?

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  • Need to set up shared storage for Guest virtual machines that are running on a Xen host

    - by Sajith
    My environment: I am doing these things at home with the purpose of learning about virtualization techniques. My machine have quad core processor that supports Intel-VT and 8GB RAM. XEN is the virtualization platform. In short, all domUs are LVM based. Mainly I have two questions; I need to have shared storage for these VMs. Something like NFS / NAS / iSCSI etc. However, I don't know which one is the best solution. Therefore, can someone tell me which suits best? Please note that, this shared storage need to be accessed by the other physical machines in the network. How to implement the selected solution for question #1? Any tutorials / guidelines / ebooks will be a great help and highly appreciated. Thank you in advance :)

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