GL screensavers crash the X server in _mesa_update_state_locked

[Dragonmaster Lou]

Binary package hint: xorg

Summary pretty much describes it. I'm currently using the open source ATI/Radeon xserver that comes with x.org.

My hardware is an IBM ThinkPad T42 with a Mobility Radeon 9600. I'm using an xrandr dual head setup with the built in screen and an external monitor.

Here is an excert of my X.org log:

Backtrace:
0: /usr/bin/X(xf86SigHandler+0x81) [0x80c9581]
1: [0xffffe420]
2: /usr/lib/xorg/modules/extensions//libGLcore.so(_mesa_update_state_locked+0x7e1) [0xb376af91]
3: /usr/lib/xorg/modules/extensions//libGLcore.so(_mesa_update_state+0x2a) [0xb376b0ea]
4: /usr/lib/xorg/modules/extensions//libGLcore.so(_mesa_Clear+0x17e) [0xb36fddbe]
5: /usr/lib/xorg/modules/extensions//libglx.so [0xb7bb9a08]
6: /usr/lib/xorg/modules/extensions//libglx.so(DoRender+0x155) [0xb7bb2625]
7: /usr/lib/xorg/modules/extensions//libglx.so [0xb7bb26bc]
8: /usr/lib/xorg/modules/extensions//libglx.so [0xb7bb6b2c]
9: /usr/bin/X [0x815754e]
10: /usr/bin/X(Dispatch+0x1aa) [0x808f47a]
11: /usr/bin/X(main+0x495) [0x8076f05]
12: /lib/tls/i686/cmov/libc.so.6(__libc_start_main+0xe0) [0xb7cf9050]
13: /usr/bin/X(FontFileCompleteXLFD+0x1e1) [0x8076241]

Fatal server error:
Caught signal 11. Server aborting

[Dragonmaster Lou (lou-techhouse)]

Here is the entire Xorg log in case it helps.

[Tormod Volden (tormodvolden)]

If you've been using fglrx before, it might be the reason. Try:
 dpkg -l '*fglrx*'
and
 locate fglrx
to see if there is still some proprietary bits around causing problems.

[Dragonmaster Lou (lou-techhouse)]

I had been using fglrx before, but because it's broken with regards to suspend/resume, I switched back to the open source driver.

So apparently I do have some fglrx bits floating around, but I'm not sure how to safely remove them without also removing my madwifi wireless driver. I did a "complete removal" from Synaptic of xorg-driver-fglrx, but the modules are still around. lsmod shows that they aren't loaded, however, and this is the output from dpkg after I thought I removed the last bits in Synaptic:

$ dpkg -l '*fglrx*'
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-f/Unpacked/Failed-cfg/Half-inst/t-aWait/T-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-==============-==============-============================================
pn fglrx-control <none> (no description available)
un fglrx-driver <none> (no description available)
un xfree86-driver <none> (no description available)
pn xorg-driver-fg <none> (no description available)

I also reinstalled all the mesa DRI packages just in case. X still crashes when using a GL screen saver.

[Tormod Volden (tormodvolden)]

Could you please try running from a Ubuntu 7.10 live cd, so that we can rule out "proprietary contamination"?

[Dragonmaster Lou (lou-techhouse)]

Sorry for the delay.

The bug also appears when running off a live CD, so there is no "proprietary contamination" here.

[Tormod Volden (tormodvolden)]

I got a pretty similar backtrace now, using radeonhd on a rv515 card.

[Bryce Harrington (bryce)]

I notice it's been a long time since this was reported, with no recent confirmations so am guessing people are not still experiencing the issue. The upstream bug also appears DOA so no luck there. I do see that several fixes have gone into the source code file that _mesa_update_state_locked comes from, so perhaps the issue was fixed upstream.

In any case, the Xorg.0.log backtrace doesn't give enough details to analyze the crash any further, so without a more detailed backtrace available I'm going to have to close it at this point. Feel free to reopen with a full backtrace if the issue can still be reproduced against current Karmic.