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If you do a ps alxww|grep X you should see that your X server is running with the option -auth followed by some filename. This file holds a random number called the MIT-MAGIC-COOKIE-1. Only X11 clients that can present this number to the X11 server in the protocol startup are allowed to connect. Apps run by the same user who started the server will find ...


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First, to give access only to the Gitlab CI runner, you need to use a more restricted command: xhost +SI:localuser:gitlab-runner Second, /etc/rc.local runs way too early for this command to have effect, and further, you need to set $DISPLAY for it to work. It depends on how your X server is being started. If you're using LightDM, I think you can make it ...


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I managed to setup with slight modification of above instructions which I got in this nvidia forum 1 While installing NVIDIA drivers nvidia-libgl(or nvidia-gl) overwrites mesa-libgl. This results AMD GPU based GUI to broke. In order to prevent this I installed nvidia with --no-opengl-files option. sudo ./NVIDI* --no-opengl-files However later when ...


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I have just bought a new laptop with a nVidia 960m inside and it is a new hybrid model that also has an Intel graphics processor working side by side. I do not know if that is the case for you but I asked a similar question here. Installing nVidia driver on hybrid card and the answer I got was to enter the Terminal and enter sudo add-apt-repository ...


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D'oh. The answer can be found in the fitlet wiki. The newer fglrx driver (15.200) seems to not support the card, which is a bug. Thus, you have to use fglrx 13.350. This is troublesome with ubuntu 14.04*.2*, since that includes a newer xorg-abi which this old driver isn't compatible with anymore. For me, I could work around this issue by using instructions ...


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The easiest way to install drivers for this new card is to run sudo add-apt-repository ppa:xorg-edgers/ppa sudo apt-get update sudo apt-get install nvidia-352 nvidia-prime sudo add-apt-repository -r ppa:xorg-edgers/ppa You will get an option to switch adapters (PRIME) in Nvidia X Server Settings.


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If you're still having this issue, I figured out a solution. This was done on a Raspberry Pi, but it should work on Ubuntu as well (I don't know how to edit the command line on Ubuntu but I'm sure there's a way to do it easily). Copied from my post on reddit: https://www.reddit.com/r/RetroPie/comments/3drzqt/anyone_using_a_wii_u_pro_controller_adapter_with/ ...


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For lost amd users: Please note that amd drivers provide a tool to generate xorg.conf aticonfig --initial


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Do NOT install video drivers to systems running in VirtualBox. Guest systems do not have direct access to hardware. Install the Guest Additions instead.


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This happened to me with PD 10.2.1 as well. Fortunately the Parallels tools installer launched automatically and all I had to do is to type the admin password, hit Enter, wait a few minutes while it finishes installing and reboots the VM. After that it was back to normal.


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This is not straightforward. It is however possible using a bit of programming to make a command line filter to prove the concept. For instance in Python (see below). This filter would take the standard input (i.e. your keyboard) and pass it on to standard output. It must also capture mouse data and when it sees scroll wheel data add arrow up or down to ...


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During install of the CUDA toolkit, when prompt, remember NOT to install OpenGL driver. https://chuanwen.wordpress.com/2015/07/19/run-cuda-on-ubuntu-14-04-2/


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I had the problem after I run startx while I had root permissions. I solved the problem looking at this post Basically you do cd ~ and then sudo chown username:groupname .Xauthority where username and groupname has to be changed accordingly


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You can remove the Nvidia proprietary driver by running in terminal sudo apt-get purge nvidia* I also suggest removing xorg-edgers ppa too. It can be done by sudo apt-get install ppa-purge sudo ppa-purge ppa:xorg-edgers/ppa But I suggest installing proprietary Nvidia driver with nvidia-prime. If you choose the right driver and install it correctly, ...


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This solution worked for me : sudo apt-get purge "fglrx.*" # remove proprietary drivers sudo rm /etc/X11/xorg.conf # remove old Xserver config reinstall open source drivers sudo apt-get install --reinstall xserver-xorg-core libgl1-mesa-glx:i386 libgl1-mesa-dri:i386 libgl1-mesa-glx:amd64 libgl1-mesa-dri:amd64 sudo dpkg-reconfigure xserver-xorg # ...


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I just researched Apple to find out many people have a problem with this particular screen https://discussions.apple.com/thread/4441040 you could try to replace the current display manager like this: press ctrl+alt+f2 now login and type: sudo service light dm stop sudo apt-get remove lightdm sudo apt-get install gdm sudo service gdm start or sudo reboot ...


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I have had the exact same problem as you. I found that xmonad was buggy, so I recommend that you save your important files and install Ubuntu GNOME. It uses less possessing power aswell, so win win. Sorry that you are just finding this out now. (Lubuntu will also work, but I had a high-performance system so I went with Ubuntu)


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Correct the permissions for your home folder: sudo chown -R $USER:$USER /home/$USER Don't use sudo without -i and a GUI based applications. Use sudo nano /etc/X11/xorg.conf or sudo -i gedit /etc/X11/xorg.conf or gksu gedit /etc/X11/xorg.conf


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yes it is possible first tell in any tty use command export DISPLAY=":1" after this command you must start x manager by typing startx then you can start there and when you press ctrl+alt+f9 you will see new x window manager


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I think ubuntu ignores xorg.conf. You could put this stuff in /usr/share/X11/xorg.conf.d, but you're probably better off using xrandr or arandr or unity-control-center to configure your monitors.


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It was solved by installing bumblebee with nvidia-346. The detailed solution is available at http://askubuntu.com/a/534567


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It's possible that something (the adapter? the use of dvi?) is preventing X from discovering the properties of your monitor, which is why it isn't showing up by name. Something you could try: Get xrandr. Run xrandr to dump out your monitor settings. Presumably, the two will show up differently. (If not, the problem is elsewhere, and easy to fix.) Read ...


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Double check that they are actually identical. Look at the product ID and dates and similar things. I had a case at work where two monitors we thought were identical didn't support identical sets of resolutions, and I discovered that they weren't identical. One was a slightly modified version released a couple months later. They had the same model number ...


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Sounds like what happens when I forget to install my hardware acceleration drivers. Usually fglrx for ATI or nouveau for nvidia.


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The best solution I could find is to make a separate daemon that run as service which monitor /dev/input/.. events and let the other user tools to connect to itself and listen for input events. Think something that replace XEvent. (bringing those input events to user space)


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You should install libx11. Run the following command: sudo apt-get install libx11-dev This package provides a client interface to the X Window System, otherwise known as Xlib. It provides a complete API for the basic functions of the window system.


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It didn't work DISPLAY=:0 compiz --replace compiz (core) - Info: Loading plugin: core compiz (core) - Info: Starting plugin: core No protocol specified compiz (core) - Fatal: Couldn't open display :0 compiz (core) - Info: Stopping plugin: core compiz (core) - Info: Unloading plugin: core DISPLAY=:0 dconf reset -f /org/compiz error: Error spawning command ...


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You could replace your current instance of compiz with the following command from a tty. DISPLAY=:0 compiz --replace You can probably also do: DISPLAY=:0 dconf reset -f /org/compiz/


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Nvidia driver is not installed according to your output. Install it this way sudo apt-get install --reinstall nvidia-331 nvidia-prime then reboot. The correct commands for nvidia-prime are: prime-select query to see which adapter is in use. sudo prime-select nvidia to switch to Nvidia sudo prime-select intel to switch to Intel. You need to ...


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I just went into system settings and selected "natural scrolling" under the mouse and trackpad options. While the trackpad does not react to the slider bars on the side and bottom, it DOES scroll appropriately when I put 2 fingers on it.


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No. xorg.conf is just a plain text file that is parsed (ie. the lines in it are read by a script and the script sets all the parameters, options and what else is valid in xorg.conf) so no, you can not use conditions. That line you want included would just be ignored or it would error out since the xorg subsystem does not understand it. You could do this ...


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Click on the top right menu (little gears logo) > Settings > Display. From there you'll be able to choose you resolution.


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Download this package and install it with sudo dpkg -i ResolutionX_1.0-0.deb The description on the Sourceforge page provides some information about what it does, and the resolutions supported - if your required resolution is included, give it a shot :) NOTE ResolutionX is a graphical frontend to randr, so if randr doesn't work with your PC, then the ...


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1.just double check that IOMMU is not enabled! 2.if you use (u)efi boot and signed kernel mobo and gpu/s both must have (u)efi bios..if gpu not have that kind of bios, a)update bios of gpu with factory uefi gpu bios,or with non factory modified older non (u)efi gpu bios(updating bios is always risk!) b)simply dont boot Ubuntu (u)efi way,change boot device ...


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For me this problem occurred after upgrading from "Ubuntu 12.04 LTS" plus TDE to "Ubuntu 14.04 LTS" plus TDE. TDE is the trinity desktop environment (trinitydesktop.org). The cause of the error was that /etc/X11/default-display-manager pointed to lightdm although during the upgrade I told it to use tdm-trinity as default. lightdm was broken (and I don't ...



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