nvidia proprietay driver crash in dual card configuration

[jdobry]

Binary package hint: os-prober

Release: Ubuntu 11.04 beta 2 - updated to 25 Apr repositoryes
nVidia driver 270.41.06

Situation:

two nvidia cards. Two separate xservers.
Any try to start second number "1" xserver crash with segfault.
When Xserver "0" is down it start correctly.

[jdobry (jdobry)]

Used HW

02:00.0 VGA compatible controller: nVidia Corporation G94 [GeForce GT 130] (rev a1)
04:00.0 VGA compatible controller: nVidia Corporation G98 [GeForce G100] (rev a1)

[jdobry (jdobry)]

It is possible reproduce on 10.04 (lucid)
With supported nvidia driver 256.52 it works fine.
With PPA buntu-x-swat/x-updates driver 270.29-0ubuntu1~lucid~xup2 it fails.
It looks like problem on nvidia drivers, but I am not able to find any similar bug report on http://www.nvnews.net/vbulletin/forumdisplay.php?f=14

[Bas van Schaik (bas-tuxes)]

Now there is: http://www.nvnews.net/vbulletin/showthread.php?t=162176

Note that the problem is rather serious on Ubuntu 11.04, as it is not possible to use older drivers as a workaround. The new Natty xorg-packages use ABI 10.0, which is only supported by the nVidia drivers >= 270.41.06.

[Bas van Schaik (bas-tuxes)]

nVidia has confirmed the bug in the forum topic I referred to earlier: http://www.nvnews.net/vbulletin/showthread.php?t=162176

> NVIDIA internally filed Bug ID: 823975 to track this issue.
> Issue is reproduced by adding 'Option "ProbeAllGpus" "false"' in "Device" Section OR Section "Screen" for one of the GPU. Issue is not repro if Option "ProbeAllGpus" "true" for both Screens.

[jdobry (jdobry)]

Option "ProbeAllGpus" "true" can be used as workaround. Tested.