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I've been running 12.04 on a NVidia GPU. I attempted to install ATI's proprietary catalyst drivers and a second GPU. Now the X-desktop will not start.

  1. How do I refresh the borked desktop?
  2. Can NVidia and ATI's HD series coexist?

"Will not start" may be a misnomer. The background comes up but the (taskbar?) on the left doesn't come up and the icons on the desktop can't be clicked. After a timeout I get a password request but then the desktop no longer shows.

I found a message from modem-manager trying to start saying it can't find /var/run/dbus/system_bus_socket. That may or may not be helpful

lspci:

03:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK106 [GeForce GTX 650 Ti] [10de:11c6] (rev a1) Subsystem: eVga.com. Corp. Device [3842:3650] Kernel driver in use: nvidia Kernel modules: nvidia_319_updates, nvidia_304, nvidia_304_updates, nouveau, ? nvidiafb

03:00.1 Audio device [0403]: NVIDIA Corporation GK106 HDMI Audio Controller [10de:0e0b] (rev a1) Subsystem: eVga.com. Corp. Device [3842:3650]

06:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] [1002:68f9] Subsystem: Hightech Information System Ltd. Device [1787:2291] Kernel modules: radeon 06:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300 Series] [1002:aa68] Subsystem: Hightech Information System Ltd. Device [1787:aa68] Kernel driver in use: snd_hda_intel

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We need the logs of the Xorg server and the drivers that you installed along with the specs (aka lspci -nnk | grep -A5 VGA) of the video cards. The xorg log you can find it at /var/log/Xorg.0.log. –  Braiam Dec 4 '13 at 4:09
    
    
Can you edit your question, also do not use drop box since some users can't access dropbox. –  Braiam Dec 4 '13 at 12:39
    
Xorg.o.log is too big to insert into the question and the dropbox link is a public share. Why can't you read it? –  user221890 Dec 4 '13 at 20:28

2 Answers 2

I've fixed the problem.

According to answer #1 at Ubuntu 12.04 - default Radeon driver does not work at all there were some missing drivers.

To get hardware acceleration (tested on 12.04 Precise Pangolin), you need to add four more packages.

sudo apt-get install xvba-va-driver libva-glx1 libva-egl1 vainfo

After installing them, the desktop successfully completed initialization on my nVidia display (which has been plugged in all along). I suppose that was the "Magic" mentioned above. Both devices show up in lspci but I have not yet tried out two monitors. Moreover CTRL-ALT-F1 no longer opens a terminal so I can't say everything is perfect yet.

03:00.0 VGA compatible controller [0300]: NVIDIA Corporation GK106 [GeForce GTX 650 Ti] [10de:11c6] (rev a1) Subsystem: eVga.com. Corp. Device [3842:3650] Kernel driver in use: nvidia Kernel modules: nvidia_319_updates, nvidia_304, nvidia_304_updates, nouveau, nvidiafb

03:00.1 Audio device [0403]: NVIDIA Corporation GK106 HDMI Audio Controller [10de:0e0b] (rev a1) Subsystem: eVga.com. Corp. Device [3842:3650]

-- 06:00.0 VGA compatible controller [0300]: Advanced Micro Devices, Inc. [AMD/ATI] Cedar [Radeon HD 5000/6000/7350/8350 Series] [1002:68f9] Subsystem: Hightech Information System Ltd. Device [1787:2291] Kernel driver in use: radeon Kernel modules: fglrx, radeon 06:00.1 Audio device [0403]: Advanced Micro Devices, Inc. [AMD/ATI] Cedar HDMI Audio [Radeon HD 5400/6300 Series] [1002:aa68] Subsystem: Hightech Information System Ltd. Device [1787:aa68]

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Not sure about coexisting without lots of magic, but to get the nVidia stuff going again, try:

Ctrl-Alt-F1 to get to a virtual terminal (I assume you just have a blinking cursor with a failed X), log in and then run:

sudo apt-get purge nvidia* 
sudo apt-get install nvidia-current

And that should get you going again.

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Did you mean install? sudo apt-get install nvidia-current does nothing useful (makes no changes). X is only half-failed. (see edited question - above). –  user221890 Dec 4 '13 at 18:38
    
Yes, I missed that in my cut-n-paste editing. Changed to what I initally meant. Odd about the Ctrl-Alt-F1. How about Ctrl-Alt-F2? If you can get the virtual terminals to work you might try apt-get purge on all these packages (nvidia and the "magic" ones) and then install them again, perhaps in a different order. –  Joseph Santaniello Dec 5 '13 at 18:20

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