Ubuntu
linux-restricted-modules-2.6.20 package

[nvidia-glx] Desktop effects freeze when switching user

Bug #95926 reported by Andrew Conkling
4
Affects Status Importance Assigned to Milestone
linux-restricted-modules-2.6.20 (Ubuntu)
Invalid
Undecided
Unassigned

Bug Description

Binary package hint: desktop-effects

This is perhaps a duplicate of bug #78470, but I want to make sure this gets covered. I'm also fairly sure that desktop-effects itself is not the problem, but I'm not sure of a better package under which to file this.

If I have Desktop Effects enabled and switch users, when I log out of the second user, the first user's password screen never appears. My mouse cursor is movable, and I actually see it switch to a text cursor (I-beam) when over the center of the screen, but the screen remains black and the keyboard indicator lights do not respond. (One thing I have not tried is to connect to the machine remotely; I wonder if the system is still functional underneath X.)

ProblemType: Bug
Architecture: i386
Date: Sun Mar 25 10:08:57 2007
DistroRelease: Ubuntu 7.04
Uname: Linux edwin-ubuntu 2.6.20-12-generic #2 SMP Wed Mar 21 20:55:46 UTC 2007 i686 GNU/Linux

Revision history for this message
Emilio Pozuelo Monfort (pochu) wrote :

Do you have a nvidia card?

This seems to be a duplicate of Bug #91414

Revision history for this message
Andrew Conkling (andrewski) wrote :

Yes, an NVidia. Here's the output from lspci:
01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200] (rev a1)

Keep in mind that I'm not sure that the machine has actually crashed when this happens, so I'm not sure that other bug is the same issue.

Revision history for this message
Emilio Pozuelo Monfort (pochu) wrote :

Hi Andrew

Can you reproduce it without Compiz enabled?

Revision history for this message
Andrew Conkling (andrewski) wrote :

On 3/31/07, Emilio Pozuelo Monfort <email address hidden> wrote:
> Can you reproduce it without Compiz enabled?

Well, if I turn Desktop Effects off, I can switch users fine. I think that's a "no" to your question, but I'm not sure. :)

Revision history for this message
Sam Liddicott (sam-liddicott) wrote :

I have the same problem.
My "cure" is to switch to a text console and pkill compiz. Metacity then starts and all is well, and I can switch back to that desktop.
If I have clicked the mouse then I can't get a text console so I have to ssh in to kill compiz

my lspci is:
01:00.0 VGA compatible controller: nVidia Corporation NV34 [GeForce FX 5200] (rev a1)

Revision history for this message
Travis Watkins (amaranth) wrote :

This is a bug in the nvidia driver.

Revision history for this message
chavez (texasflyfisher) wrote :

I see the same problem also using the accelerated nivdia driver, compiz enabled and when logging off from a user I switched to. Is this then a duplicate of some other bug or is this the correct bug to watch for the fix? Thanks.

Revision history for this message
Sitsofe Wheeler (sitsofe) wrote :

This looks similar to Bug #88152

Revision history for this message
Sitsofe Wheeler (sitsofe) wrote :

Andrew:
Does disabling sync to vblank by doing
gconftool -s /apps/compiz/general/screen0/options/sync_to_vblank-t boolean false
make any difference?

Changed in linux-restricted-modules-2.6.20:
status: Unconfirmed → Needs Info
Revision history for this message
Launchpad Janitor (janitor) wrote :

[Expired for linux-restricted-modules-2.6.20 (Ubuntu) because there has been no activity for 60 days.]

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