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• How can I reduce the time taken to login by postponing/delaying some startup applications?

  - by koushik

  I have setup some applications to startup on each login (e.g., redshift-gtk, gtg) automatically but after adding these to startup applications (System -> Preferences -> Startup Applications) obviously the time taken to login has increased. Due to all this the time it takes for my panels, desktop etc to appear is too long - until which I am forced to wait. I don't need these apps to be available immediately, but it would be good if they startup eventually, meanwhile the ubuntu menu/panel is available for running other apps that I might need to. I tried using at command, with the intention of editing all startup applications to put the commands in the at queue, but this didn't work since the apps don't get the necessary environment variables (like DISPLAY). Is this what nice command is used for? Any other ideas how I can accomplish this? If possible, I would like to avoid editing the startup applications commands, since this would mean a lot of effort to replicate on other machines I use.

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• How to work with scenes in a 2D game

  - by Anearion

  I'm a java/android programmer, but I don't have any experience in game programming, I'm already reading proper books, like "Pro Android Games", but my concerns are more about the ideas behind game programming than the techniques themselves. I'm working on a 2D game, something like Cluedo to let you understand the genre. I would like to know how should I act with the "scenes", for example, a room with a desk, TV, windows and a lamp. I need to make some items tappable and others not. Is it common to use one image (invisible to the user) with every different item a different color, then call the getColor() method on the image? Or use one image as background, and separate images for all the items? If the latter, how can I set the positioning? and should I use imageView or imageButton? I'm sorry if those are really low quality questions, but as "outsider" ( I'm 23 and still finishing my university ) it's pretty hard learn alone.

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• Tic-Tac-Toe game AI

  - by David Jones

  I'm looking into creating a simple tic tac toe/noughts and crosses game in Actionscript3 and am trying to understand the ideas behind the AI used in a game like this. I've seen some simplistic examples online but from what I've read a game tree or something like minimax is the best way to go about this. Can anyone help explain or reference any good examples of this? I've seen that there is a library called as3ds - data structures for game developers which has a number of classes that might help tie this together? Any info/examples or help is much appreciated.

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• Plugging two external screens to laptop via VGA and HDMI

  - by avilella

  I have an Asus U30JC laptop with a VGA and HDMI ports. I can connect my external screen (1920x1200) to either of those ports but I wonder if I would be able to use two screens at the same time, one plugged to the VGA and the other to the HDMI socket. Any ideas? Where should I find out? Doing xrandr, I get: Screen 0: minimum 320 x 200, current 1366 x 768, maximum 8192 x 8192 LVDS1 connected 1366x768+0+0 (normal left inverted right x axis y axis) 293mm x 164mm 1366x768 60.0*+ 1360x768 59.8 60.0 1024x768 60.0 800x600 60.3 56.2 640x480 59.9 VGA1 disconnected (normal left inverted right x axis y axis) HDMI1 disconnected (normal left inverted right x axis y axis) DP1 disconnected (normal left inverted right x axis y axis)

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• Google locking on Ubuntu

  - by user170534

  Problem I'm facing is that Google doesn't respond well timed to connection requests send from any browsers known to Linux. As far as I can tell, this was existent in Mint, which is Ubuntu based. I have no debug or guess about cause but I'm sure there are people with the same problem. ping of terminal is untouched but any other browser keeps unloaded, for example; google loads fine, I search for something. Then I decide to search for something else and ta daa: You gotta wait for 30 seconds for Google server to respond. I tried using google's public DNS without success. Flare the suggestions & ideas!?

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• How do I get the Grub menu back after installing Windows on a separate disk?

  - by Shazzner

  Tried sudo grub-install on sda1 but it complained about being a BAD IDEA. I had to install windows for a work related issue so I used a separate disk (I had used it for ubuntu on this computer, but bought a bigger disk so installed ubuntu on that and left the old one in in case I needed an old file). Windows installed fine but overwrote Grub. So if I choose the Ubuntu disk to boot first in BIOS I get a blank screen. I googled and followed this advice: https://help.ubuntu.com/community/RecoveringUbuntuAfterInstallingWindows However, when I get down to this section: sudo grub-install --root-directory=/media/0d104aff-ec8c-44c8-b811-92b993823444 /dev/sda1 I get this: Attempting to install GRUB to a partition instead of the MBR. This is a BAD idea… --recheck does nothing. Any ideas?

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• Double-click instead of single-click in Ubuntu 12.04

  - by evfwcqcg

  When I do a single click, my computer (with Ubuntu 12.04) acts like it was double click. I think it happens in ~50% of cases. It happens with all the program I use: browsers, file manager, terminal and so on. I'm not sure when exactly it started, maybe a week ago, and I don't remember if it started to happen after system-update or after the installation of some packages. What I tried: change mouse change mouse settings like Double-Click Timeout None of those helped me. Any ideas? Thanks.

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• VirtualBox and Ubuntu Mount Error

  - by skaz

  I have Ubuntu 10 as the guest OS on a Windows 7 machine. I have been trying to setup shares through VirtualBox, but nothing is working. First, I create the share in VirtualBox and point it to a Windows folder. Then I try to mount the drive in Linux, but I keep getting /sbin/mount.vboxsf: mounting failed with the error: Protocol error I have read so many solutions to this, but none seem to work. I have tried: Using the mount.vboxsf syntax Reinstalling VBox additions Rebooting Enabling and trying as root account Any other ideas? In case I am doing something dumb, here are more details: I made a share called "Test" in VBox Shared folders. Then I made a directory in ubuntu named "test2". Then I tried to execute this command: sudo mount -t vboxsf Test /mnt/test2 Thank you!

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• Clicking on clues and other objects in a 2D cluedo like game

  - by Anearion

  I'm a java/android programmer, but I don't have any experience in game programming, I'm already reading proper books, like "Pro Android Games", but my concerns are more about the ideas behind game programming than the techniques themselves. I'm working on a 2D game, something like Cluedo to let you understand the genre. I would like to know how should I act with the "scenes", for example, a room with a desk, TV, windows and a lamp. I need to make some items tappable and others not. Is it common to use one image (invisible to the user) with every different item a different color, then call the getColor() method on the image? Or use one image as background, and separate images for all the items? If the latter, how can I set the positioning? and should I use imageView or imageButton? I'm sorry if those are really low quality questions, but as "outsider" ( I'm 23 and still finishing my university ) it's pretty hard learn alone.

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• How to reboot into Windows from Ubuntu?

  - by andrewsomething

  I'm looking for a way to reboot into Windows from Ubuntu on a 10.10/Vista dual boot system. The specific use case is that I would like to be able to ssh into my running Ubuntu instance and issue a command that will initiate a reboot directly into Windows. I found a promising blog post, but the script that it suggests isn't working: #!/bin/bash WINDOWS_ENTRY=`grep menuentry /boot/grub/grub.cfg | grep --line-number Windows` MENU_NUMBER=$(( `echo $WINDOWS_ENTRY | sed -e "s/:.*//"` - 1 )) sudo grub-reboot $MENU_NUMBER sudo reboot man grub-reboot isn't much help, but it seems to be leading me in the right direction: set the default boot entry for GRUB, for the next boot only WINDOWS_ENTRY=`grep menuentry /boot/grub/grub.cfg | grep --line-number Windows` MENU_NUMBER=$(( `echo $WINDOWS_ENTRY | sed -e "s/:.*//"` - 1 )) echo $MENU_NUMBER This returns the expected value, but on reboot the first menu entry is still highlighted. Any ideas why this isn't working or suggestions for other solutions?

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• Getting the Dell XPS 16 Synaptics touchpad to work after hibernation

  - by Aron Rotteveel

  I am currently experimenting with using Ubuntu as a my main OS instead of Windows 7. So far, pretty much everything is working fine, except for an issue that I am having with my touchpad. I have a Dell XPS 16 (1640) with a Synaptics touchpad. It works out of the box, but it seems that it stops working after returning from hibernation mode. This problem has also been addressed in an earlier bug, but judging from this bugreport, it should be fixed by now. I am running the 2.6.35-23-generic-pae kernel. Any ideas?

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• Ubuntu Server 12.04 start fails after update

  - by Abbgrade

  I did an system update on ubuntu server 12.04, which requestet an reboot. Since that, the system never reaches the login. It hangs on: mount: mounting /dev on /root/dev failed: No such file or directory done. mount: mounting /sys on /root/sys failed: No such file or directory mount: mounting /proc on /root/proc failed: No such file or directory Target filesystem doesn't have requested /sbin/init. No init found. Try passing init= bootarg. BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) build-in shell (ash) Enter 'help' for a list of build-in commands. (initramfs) i tried already to repair it using a live system: + Mounting the filesystems (/boot ext, / btrfs) + fsck ran without problems. + /etc/fstab seems to be OK. + apt update/upgrade on chroot succeed. now, i have no more ideas :/

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• ssh tunnel to a remote CUPS server

  - by drevicko

  There is a CUPS server beyond a firewall and I'd like to use it's printers. I have ssh access to computers that can access the CUPS server, and can get at the servers web interface by forwarding say port 1631. I cannot forward port 631 as I've not got root access to anything on the servers network. In Ubuntu's 'Printing' control panel, I can enter the address of a server, but I've not been able to connect through the forwarded port (localhost:1631, which is forwarded to the remote CUPS server's 631 port). Any ideas?

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• You know you're a "version control avoider" if [closed]

  - by kmote

  I'm in the process of trying to introduce Version/Revision Control to a team of developers who have never used it. I'll be giving a presentation that I hope will be a persuasive explanation of the importance of Version Control -- the benefits of using it and the liabilities of avoiding it. I'd like to kick it off with an amusing but instructive list modelled after the "redneck" line of jokes. Can anyone help me add to this list? "You know you're a Version Control Avoider if..." You have a bunch of files or folders with names like Engine_05212012_works_old[2].cpp You've had to explain to your boss how you accidentally overwrote production code. I don't consider myself terribly witty, but I think a little humor could be helpful in this situation. Any ideas for how to extend this list? [Bonus points if you can suggest a better moniker than "Version Control Avoider"]

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• Gnome 3 panel and menus are all gone?

  - by Hannes

  I am running Ubuntu 11.10 using gnome 3 shell. I have set my pc to automatically log into gnome shell so I do not see the login screen. Today I installed some updates and now the gnome panel is gone. When my pc logs in I ONLY see the background. There are no menus, nothing! Even the exit, minimize and maximise buttons in the top tight corner of the windows are gone. Also, alt+f2 also does not work. Any ideas how to fix this? I have a Nvidia Geforce 7900GTO with the Nvidia proprietary drivers installed. I have also used the recovery mode and removed some packages that apparently were broken. Still does not work.

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• How do I get a D-Link DWL-G520 working?

  - by human33

  I have Ubuntu 12.04 on an older desktop PC, and I am finding it much harder to connect to a wifi connection than it should be. I have an iPhone with which I want to tether to it with Mifi 4.0, but I need to install ipheth which I can't do without internet on that computer. I am typing from my other windows pc with which i can download and move hings with thumb drives, but haven't gotten keryx to work. I also found a D-Link DWL-G520 HIGH SPEED 2.4GHZ (802.11G) WIRELESS 108MBPS PCI ADAPTER which I installed, but can't find a driver to put on a flashdrive to use it. If anybody has any ideas, they are appreciated. I am a noob, and I don't want to have to move the comp. downstairs to plug into the modem. PS: I also have a netgear USB network adapter, which doesn't work with my Ubuntu.

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• Wireless xbox360 pad connected with xboxdrv doesn't show in jstest

  - by Kyle Letham

  So Lubuntu 13.04, 3.4.0. I'm trying to use my wireless xbox controller. I've installed xboxdrv. I have to run it with sudo, or I get USBController::USBController(): libusb_open() failed: LIBUSB_ERROR_ACCESS. If I connect the adapter, run the program, and then press the button on the gamepad to connect it, it never really connects - just flashes like it's searching. If I reboot, leaving the controller searching, and run the command again while it's searching after I boot up, the controller connects (the light becomes solid in one corner). Using pkill xboxdrv and then relaunching it doesn't work. Regardless, no matter what I do, the gamepad never shows up in jstest-gtk. sudo xboxdrv --debug gives me: Controller: Microsoft Xbox 360 Wireless Controller (PC) Vendor/Product: 045e:0719 USB Path: 002:005 Wireless Port: 0 Controller Type: Xbox360 (wireless) [DEBUG] XboxdrvMain::run(): creating UInput [DEBUG] XboxdrvMain::run(): creating ControllerSlotConfig [DEBUG] UInput::create_uinput_device(): create device: 65534 [DEBUG] LinuxUinput::LinuxUinput(): Xbox Gamepad (userspace driver) 0:0 Any ideas?

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• Circle vs Edge collision detection / resolution

  - by topheman

  I made a javascript class Ball.js that handles physics interactions betweens balls as well as painting. In the v1.0, the ball vs ball collision detection and resolution is well handled. In the next version (v2), I'm trying to add edgeCollision handling. I'm having some problems, maybe you will be able to help me. All the v2 branch source code is on github repository : https://github.com/topheman/Ball.js/tree/v2 The v2 demos (where you can see the bug I will be talking about) : http://labs.topheman.com/Ball-v2/#help As you will see on the demo, I have two major problems that I'm having a really hard time to solve on Ball.js : method resolveEdgeCollision : bounce angle is inconsistent method checkEdgeCollision : if the ball's velocity (the length that it runs each frame) is higher than its diameter, eventually, it will pass through an edge, without triggering any collision Any Ideas ?...

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• How can I determine whether a shellscript runs as root or not?

  - by EvilPhoenix

  This is something I've been curious about. I make a lot of small bash scripts (.sh files) to do tasks that I routinely do. Some of those tasks require everything to be ran as superuser. I've been curious: Is it possible to, within the BASH script prior to everything being run, check if the script is being run as superuser, and if not, print a message saying You must be superuser to use this script, then subsequently terminate the script itself. The other side of that is I'd like to have the script run when the user is superuser, and not generate the error. Any ideas on coding (if statements, etc.) on how to execute the aforementioned?

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• Best way to slice up a non rectangular image?

  - by Hoff

  I have the image below and need to create a rollover for each "piece" or arrow in the circle. Because the image isn't rectangular, it boggles how me how I'm going to do this without having badly overlapping pieces. As you can see from the image below, the slices will overlap each other (quite a bit), which will not be good for the rollover. Does anybody have any ideas as to how to accomplish this without resorting to Flash or HTML5? The majority of our site's users use dinosaur browsers that don't support HTML5. Here's the link to the image: http://img812.imageshack.us/img812/3166/wheela.png

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• Create secure working environment on USB stick

  - by Chris

  I want to create an usb stick which contains an ubuntu installation that: can be used as a working environment (Covered in: How do I install Ubuntu to a USB key?) - ie the ubuntu installation on the stick must provide an accessible home folder. Is completely encrypted. I intend to use it as a secure environment to work on sensitive customer data - and also need the system on the stick to be able to connect to the internet. How do I realize the complete usb stick encryption? I am also very thankfull for any further articles and ideas on this topic!

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• System freeze after opening Wi-Fi menu can boot into the machine and use Internet in recovery mode

  - by Michael

  So right now sitting in front of my Alienware area 51 desktop. It has a Broadcom Netlink BCM 5784M gigabit ethernet PCI E card. Most of the time able to get through the login screen and to the main screen if I click on the wireless settings on the top right-hand corner the system immediately freezes the cursor does not move at all keyboards are unresponsive. I was doing some quick Google searching and I found a suggestion to boot into recovery mode I did this and did a apt-get Distribution update which ran successfully installed then I rebooted into the regular system same thing I'm pretty sure it's the network card because even if I don't click the settings if a network related dialog opens such as disconnection or connection the system again immediately freezes. I'm running Ubuntu 13.04 ** update 1 ** Just was able to use my system for a little bit however when I went into Firefox and hit the web it again froze so obviously a driver problem but I'm not sure how to get drivers for Broadcom which apparently according to the description on stack-overflow is terrible Any ideas? Sorry for lack of punctuation on an ipad.

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• Tips for building an AI for a 2D racing game

  - by declique

  I have a school project to build an AI for a 2D racing game in which it will compete with several other AIs (no collision). We are given a black and white bitmap image of the racing track, we are allowed to choose basic stats for our car (handling, acceleration, max speed and brakes) after we receive the map. The AI connects to the game's server and gives to it several times a second numbers for the current acceleration and steering. The language I chose is C++, by the way. The questions are: What is the best strategy or algorithm (since I want to try and win)? I currently have in mind some ideas found on the net and one or two of my own, but I would like before I start to code that my perspective is one of the best. What good books are there on that matter? What sites should I refer to?

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• No sound on fresh install of 13.10

  - by Totalnon

  I installed a new copy of 13.10 today and cannot get my audio to work. Speakers test good on other devices, enabled in the BIOS, worked this morning in a Windows environment. I ran all of the available updates through apt-get. aplay -l lists my card (which tells me Ubuntu recognizes the hardware, I have been looking around the web and trying various things to no avail. Pulse folder permissions seem fine, I've reinstalled ALSA, and the card shows both digital and analog in the system settings sound section. I have tried this guide: Sound Troubleshooting Guide As well as looked through these forums under the tags sound and 13.10 Anyone have any ideas that may help me?

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• 12.04 Install Freeze, Blank Cursor Page

  - by smmilke

  I have been trying to install Ubuntu 12.04 via a live CD and most recently with the windows installer I found on line. The windows installer seemed to be working; I selected the partitioned portion of the drive on which to install Ubuntu and started the install process. The process freezes on a page with a flashing cursor and nothing else displayed. I have read about similar problems but have not been able to implement any of the solutions people have discussed. Any ideas on what might be hanging up the process, or how to get a better idea of what is causing the problem would be helpful. If anyone has had this problem and has a solution it would be GREATLY appreciated!

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