Comment 0 for bug 586325

--- Bug description ---
When I try to change the display resolution with KMS enabled (i915.modeset=1), the graphic output is destroyed. This means I can only see parts of the screen and the content starts moving (looks similar to a CRT with lost sync).

--- System environment ---
# uname -m
x86_64
# pkg-config --modversion libdrm
2.4.14
# glxinfo | grep Mesa
OpenGL renderer string: Mesa DRI Intel(R) 965G GEM 20090712 2009Q2 RC3
OpenGL version string: 2.1 Mesa 7.6
# cat /var/log/Xorg.0.log
X.Org X Server 1.6.5
Release Date: 2009-10-11
X Protocol Version 11, Revision 0
Build Operating System: openSUSE SUSE LINUX
Current Operating System: Linux linux 2.6.31.3-1-desktop #1 SMP PREEMPT 2009-10-08 00:27:25 +0200 x86_64
Build Date: 12 October 2009 08:58:03PM
...
(II) LoadModule: "intel"
(II) Loading /usr/lib64/xorg/modules//drivers/intel_drv.so
(II) Module intel: vendor="X.Org Foundation"
        compiled for 1.6.5, module version = 2.9.0
        Module class: X.Org Video Driver
        ABI class: X.Org Video Driver, version 5.0
...
# uname -r
2.6.31.3-1-desktop
# cat /etc/SuSE-release
openSUSE 11.2 RC 1 (x86_64)
VERSION = 11.2
# Mainboard:
<I'll have to look... (Intel mainboard with i965G chipset)>
Display connector: DVI (via ADD2 card)

--- Steps to reproduce (about 90% reproducible) ---
1. Start openSUSE 11.2-RC1 from KDE4 Live-CD. Enter "i915.modeset=1" at the boot prompt. (The problem also happens with the current Ubuntu Live-CD)
2. Wait until the desktop is loaded.
3. Start "krandrtray" (using "xrandr" usually leads to the same result)
4. Switch resolution several times (from 1600x1200 to 1024x768)