[RS690M] newest mesa update makes kwin compositing constantly crash to kdm

After the recent mesa update kwin composite in kubuntu is broken. Loging in from kdm works, the desktop starts, but when opening any aplication window (for example system settings) Xorg crashes and I'm back at kdm login. From this point also changing to terminal ctrl+alt+f1 doesn't work as by doing that I'm left with kdm bitmap and some graphical garbage is produced at the top of the screen.

When compositing is disabled everything is ok, also strangely when booting up the kernel with radeon.modset=1 and using KMS compositing in kde works as it should and the bug is gone.

My xorg.conf is unmodified default one so I'm not attaching it. The card is radeon x1200 (rs690) on a toshiba a215-7416 laptop.

Hi Marcinq,

This sounds like it might be a release critical bug for us. You could help us a LOT if you could collect a full backtrace on this crash.

For information on how to collect backtraces, directions are at http://wiki.ubuntu.com/X/Backtracing - let me know if you have any questions.

Can you also attach the output of `dmesg` and your /var/log/dpkg.log for reference?

Thanks for your bug report. Can you please also attach your gdm log, from /var/log/gdm/ there is :0.log and :0.log.1 etc, and one of them has hopefully a stacktrace or other error messages.

Would you have the chance to try a 32-bit live CD? I wonder if it is a 64-bit issue.

Apport unfortunately doesn't catch this issue (I've checked /var/crash too after getting no pop up)..

I can try the gdb/remote method but only tomorrow when I'm likely to have access to a second machine.

I'll download the 32 bit CD and check up on this too.

From the kdm log:
X: radeon_bo_legacy.c:207: legacy_is_pending: Assertion `bo_legacy->is_pending <= bo->cref' failed.

marcinq, thanks for posting the logs so quickly. Upstream is aware of the issue, and it is confirmed by other users. It would be nice if you also subscribe to the upstream bug report http://bugs.freedesktop.org/show_bug.cgi?id=24131 in case they need people to test things.

Good that there is KMS as a workaround :)

marcinq, in the upstream bug report there is a specific change flagged when the crash first appeared. To better understand the cause of this crash it would be worthwhile to test if dropping that change makes the crash go away.

For your convenience in testing this I've created a ubuntu package with this patch reverted. Could you please install from this ppa and restart X, and see if you are able to start without kwin crashing. This will give some good insight into how we can avoid this problem for kubuntu users.

https://edge.launchpad.net/~bryceharrington/+archive/beige

Thanks, that's really convenient :) Yes it does solve the issue. No crashes in that version.

However that version produces some white lines garbage on screen when moving windows, or when the dim effect for kdesudo is active. Those lines stay there and are refreshed/gone after next window move, but that produces new ones. I'm attaching a picture with that problem. Once again this does not happen when using kms, but kms is a lot slower on this card then normal/old mode.

marcinq, I think your white lines might be bug 446425.

I am able to reproduce both issues on RV515, by installing kwin and running "kwin --replace", then right click on the window frame to "Configure Window Behaviour" and "Enable Desktop Effects". Just moving windows around and switching between them with Alt-Tab does trigger the issues.

I have verified that 7.6.0-1ubuntu2~bug446578~1 fixes the issue in this report.

Could this bug be related to what I'm experiencing on my old-ish R200 ? Whenever I run KDE 4.3 with desktop effects enabled, opening any menu or window results in a freeze- the mouse can still be moved but the menus don't respond to clicks and the keyboard is completely unresponsive, requiring a hard reboot. I'm also getting some trash on the screen for a second, every time I log into KDE. Don't know if that's related.

Everything works fine without Kwin effects and compositing works fine in GNOME.

I filed a bug to report this problem which was marked as a duplicate of this bug.

I see this problem on 2 64bit installations of karmic. Can I use the package sited above?

>Tormod Volden wrote on 2009-10-09: #14
>I have verified that 7.6.0-1ubuntu2~bug446578~1 fixes the issue in this report.

 I added the ppa to my sources.list and updated but upgrade didn't pick up any new mesa packages. What else am I supposed to do?

Thanks,
Tom

I also tried setting radeon.modeset=1 on the kernel command line but it did not seem to help. I am not sure I put this parameter in the correct place though.

I hit the shift key during boot to bring up the grub menu
selected 'e' to edit the boot menu entry
then appended the radeon.modeset=1 to the command line starting with linux
then ctrl-x to boot

Tom, since there is now a new 7.6.0-1ubuntu2 in karmic, the 7.6.0-1ubuntu2~bug446578~1 will not be installed. You can try this to force the wanted version:
 sudo apt-get install libgl1-mesa-dri=7.6.0-1ubuntu2~bug446578~1 libgl1-mesa-glx=7.6.0-1ubuntu2~bug446578~1 libglu1-mesa=7.6.0-1ubuntu2~bug446578~1 mesa-utils=7.6.0-1ubuntu2~bug446578~1

It sounds like you set the modeset option correctly though.

I can report that forcing the install of 7.6.0-1ubuntu2~bug446578~1 on my notebook PC with ATI Radeon Xpress 200M graphics chip has solved the problem thus far. I can (re)enable compositing and desktop effects on Kubuntu Karmic Beta with KDE 4.3.2 and not experience the crash back to kdm login screen.

I am running the latest kernel 2.6.31-13. So I tried both booting without Radeon KMS enabled and with "radeon.modeset=1". Enabling "radeon.modeset=1" slows down my system, but on the other hand, leaving Radeon KMS off by current default creates the situation whereby I can see certain visual artifacts on the screen.

I can also report that I am getting kwin crashing, however it is not as "fatal." I am still able to open applications and I don't end up at the login screen when it happens. But it is happening regularly and apport is not able to collect for it. I am running KDE amd64 with kernel 2.6.31-13 on a HP HDX 16 with nVidia GeForce 9600M GT and nVidia driver version 185.18.36 (with of course compositing / desktop effects). Since it is not really bothering me I don't think I'll change anything unless someone wants me to for testing sake. If you need any files let me know and I'll be glad to post these.

Nathan, if you using the proprietary nvidia drivers, you are not using the mesa libraries.

Same issue here to.. turn effects on open Systemsettings or right-klick... wooooms back to KDM
Everything went fine and as stable like never before, before updating MESA..
I also tried the X-Udates PPA ( X-SWAT ) to see if it would get better, but nope!.. Why did we update Mesa, I dont understand???!!!

I am running a 32bit have this issue on a AMD 740G ( Radeon 2100 ) and another system with a ATI card ..

Jason, please read Bryce's comment above.

Ohh.. yeah.. okay, ill try that out :-) thanks... ( I should have read everything first )

marcinc, thanks for testing. The white lines seem less severe than a crash, so I guess this patch is worth adding. Please file a separate bug report on the white line issue.

Bryce, note that the white lines are not caused by the patch. But without the patch the server crashes before he can see any. I am pretty sure the white lines issue is the one you fixed in the last upload.

This bug was fixed in the package mesa - 7.6.0-1ubuntu3

---------------
mesa (7.6.0-1ubuntu3) karmic; urgency=low

  * Add 109_revert-dma-reuse.patch: Fix assertion failure leading to crash
    on kwin when compositing is enabled. This reverts commit 284a7af27.
    (LP: #446578)

 -- Bryce Harrington <email address hidden> Tue, 13 Oct 2009 00:52:32 -0700

yes, I couldn't test that white line patch from bug 446425 because it still was effected by this bug...

Just to cofirm with latest mesa upgrade both bugs are gone for me and compositing works perfectly :)

I can also confirm that the white line bug is gone, composite speed is good and smooth + till now, no crash! :-)
Awesome.... I Love it....
Thanks!..

Does anyone know where we are at with this bug? It seems to be the one that is affecting me, I am fully up-to-date using KUbuntu 10.10, and I can't enable KWin. I have good graphics acceleration otherwise. I have tried xorg-edgers and x-updates, and they don't help.