FS#22183 - [intel-dri] intel-dri 7.9.99.git20101217 breaks KDE compositing

Attached to Project: Arch Linux
Opened by Antonis (birdflesh) - Wednesday, 22 December 2010, 07:15 GMT
Last edited by Andreas Radke (AndyRTR) - Saturday, 29 January 2011, 10:38 GMT
Task Type Bug Report
Category Packages: Testing
Status Closed
Assigned To No-one
Architecture x86_64
Severity High
Priority Normal
Reported Version
Due in Version Undecided
Due Date Undecided
Percent Complete 100%
Votes 1
Private No

Details

Description: After upgrading to the latest testing mesa packages KDE desktop effects based on lanczos filter (taskbar thumbnails, present windows) become really slow and the whole desktop is unresponsive for a few seconds whenever one of this effects is used. At some point KDE detects the slowness and suspends compositing altogether. This was not the case with mesa 7.9 series packages where everything works flawlessly. .xsession-errors does not provide any useful info.


Additional info:
* package version(s) intel-dri 7.9.99.git20101217-1
* hardware intel x4500


Steps to reproduce: Upgrade to pre-7.10 mesa packages from [testing] and login to KDE.
This task depends upon

Closed by  Andreas Radke (AndyRTR)
Saturday, 29 January 2011, 10:38 GMT
Reason for closing:  Fixed
Comment by Andreas Radke (AndyRTR) - Wednesday, 22 December 2010, 16:06 GMT
Make sure you did a full pacman -Syu. Please post your dmesg + Xorg.0.log.
Comment by Antonis (birdflesh) - Thursday, 23 December 2010, 07:41 GMT
Same behaviour after upgrading to 7.9.99.git20101222 (this is a fully updated system with [testing] enabled). Attached are my dmesg.log and Xorg.0.log
   dmesg.log (30.9 KiB)
   Xorg.0.log (31.1 KiB)
Comment by Jan de Groot (JGC) - Thursday, 23 December 2010, 09:19 GMT
intel-dri from testing is broken for most intel users. If you have a G35, then the bug is in xf86-video-intel, but in all other cases intel-dri is the problem. You can safely downgrade intel-dri to the version in extra, it will work with new drivers, libgl, mesa, xorg-server and libdrm from testing.
Comment by Antonis (birdflesh) - Thursday, 23 December 2010, 09:36 GMT
It's definetely the intel-dri package (downgrading just this one solves the issues). I just hope that 7.10 does not move into [extra] before things are better for intel users.
Comment by Antonio Rojas (arojas) - Wednesday, 19 January 2011, 08:22 GMT
The lanczos filter has been blacklisted for the intel/mesa 7.10 combo in KDE 4.6, so this won't be a problem anymore with the upcoming KDE 4.6

http://websvn.kde.org/branches/KDE/4.6/kdebase/workspace/kwin/lanczosfilter.cpp?revision=1215502&view=markup
Comment by Antonis (birdflesh) - Saturday, 29 January 2011, 10:24 GMT
Indeed, KDE 4.6 and mesa 7.10 are working together fine.