Latest working kernel version: Every version with KMS disabled. Earliest failing kernel version: Same problem with 2.6.29rc8 Distribution: GNU/Linux Debian Sid Hardware Environment: 00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960 Integrated Graphics Controller (rev 0c) Software Environment: Xorg(master) libdrm(master) xf86-intel(master) mesa(master) Problem Description: X does not draw elements unless mouse currsor is moved. Moreover things are horribly slow. Also after booting in KMS enabled mode. grep i915 /proc/interrupts 29: 1 0 PCI-MSI-edge i915 After booting in KMS disabled mode. grep i915 /proc/interrupts 29: 5853 5411 PCI-MSI-edge i915@pci:0000:00:02.0 dmesg/syslog/Xorg.0.log does not produce any strange information so not attached. Steps to reproduce: Boot in KMS enabled kernel 2.6.29 on GM965 with software as above and startx or gdm.
Confirming this issue with the same hardware...present in drm-fixes and drm-linus trees as well. Makes KMS useless on my laptop, even though it otherwise works correctly.
Does this still exist in 2.6.31?
This has been fixed in 2.6.30 already or maybe 2.6.29. And was caused by vbetool on Debian systems messing with gpu, now not only this package is not mandatory, but there is also in kernel fix for such a cases. I am closing this.