Two video cards on same pc, problems with default GUI after upgrade

Asked by Mike Hall on 2012-10-30

After recent software upgrades on my 12.10 system, the GUI manager no longer provides the launch icons.
I am uncertain how to start applications when in this situation, and how to reset GUI so that standard start-up occurs.

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Ubuntu xserver-xorg-video-nv Edit question
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If you press CTRL+ALT+T

What is the output of:

sudo lshw -C display; lsb_release -a; uname -a


Mike Hall (mhhall) said : #2


       description: VGA compatible controller
       product: RS880 [Radeon HD 4200]
       vendor: Advanced Micro Devices [AMD] nee ATI
       physical id: 5
       bus info: pci@0000:01:05.0
       version: 00
       width: 32 bits
       clock: 33MHz
       capabilities: pm msi vga_controller bus_master cap_list rom
       configuration: driver=radeon latency=0
       resources: irq:18 memory:c0000000-cfffffff ioport:b000(size=256) memory:f9ff0000-f9ffffff memory:f9e00000-f9efffff
  *-display UNCLAIMED
       description: VGA compatible controller
       product: GT200b [GeForce GTX 275]
       vendor: NVIDIA Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       version: a1
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress vga_controller cap_list
       configuration: latency=0
       resources: memory:fd000000-fdffffff memory:d0000000-dfffffff memory:fa000000-fbffffff ioport:c800(size=128) memory:fe880000-fe8fffff
Distributor ID: Ubuntu
Description: Ubuntu 12.10
Release: 12.10
Codename: quantal
Linux mhhall-work 3.5.0-17-generic #28-Ubuntu SMP Tue Oct 9 19:31:23 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

Stderr seems to have message:
No LSB modules are available.

Sounds like you may need to form an xorg.conf detailing both displays. This is the only way I have seen 2 differnent cards work well in Linux. Fareasier to buy 2 Nvidia or 2 AMD cards and have an easy life.

Mike Hall (mhhall) said : #4

I'm really just trying to use the 2nd graphics card (nvidia) as a processor (no monitor connected).
I guess that I could reload (with the on-board GPU disabled), but I've been having issues getting
a nvidia driver to work (seems that 12.10 version won't let me use Jockey to install the 3rd party
nvidia drivers).

Looked like I had things working prior to last software update.

Seems like there ought to be some way to reset my GUI (remove / change something in my account) so that the GUI settings are reset.

Just disable the onboard in BIOS, no need to reinstall. Should be ok

Mike Hall (mhhall) said : #6

When running with the nvidia card as primary, I'm still seeing same GUI problem (can't see the "dash" items to launch applications).

I also am unable to run BOINC / GPU application (which appears to need some version of nvidia driver installed).


sudo apt-get install nvidia-current

Reboot to test. You can do this in the terminal with:

sudo reboot


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