Comment 21 for bug 160309

Same problem with " VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03) ".

Freezes when you resume from suspend to ram. It's appear a busy mouse cursor, you can move it for a while, then all stop, and again. Imposible to go to console (Ctrl+Alt+F1). Only solution turn off the computer.

This bug is stocastic. if suspend resume cicle is fast not always hang, if suspend more time almost always hang. I have tryed all posible solutions, no compiz, no screensaver, multiple combinations of /etc/accpi-support, a lot of alternative xserver-xorg-video-intel debs: ( xserver-xorg-video-intel_2.1.1-0ubuntu10~bwh4_i386.deb, xserver-xorg-video-intel_2.1.1-0ubuntu10~fw1_i386.deb, xserver-xorg-video-intel_2.1.1-0ubuntu10~pcjc2.2_i386.deb, ...). Bug persists.

This is the same bug #160309 or related, X crashes when idle. When compiz is active Xorg logs is:

_____
(II) AIGLX: Suspending AIGLX clients for VT switch
Error in I830WaitLpRing(), timeout for 2 seconds
..
FatalError re-entered, aborting
lockup
_______________-

When compiz is inactive Xorg logs when freezes after resume is, as reported in this bug:
______________
(II) intel(0): [drm] removed 1 reserved context for kernel
(II) intel(0): [drm] unmapping 8192 bytes of SAREA 0xf8c04000 at 0xb7ae7000
(EE) intel(0): I830 Vblank Pipe Setup Failed 0
(EE) intel(0): I830 Vblank Pipe Setup Failed 0
(EE) intel(0): I830 Vblank Pipe Setup Failed 0
(II) intel(0): xf86UnbindGARTMemory: unbind key 0
(II) intel(0): xf86UnbindGARTMemory: unbind key 1
(II) intel(0): xf86UnbindGARTMemory: unbind key 2
(II) intel(0): xf86UnbindGARTMemory: unbind key 3
(II) intel(0): xf86UnbindGARTMemory: unbind key 4
_________________

So, in practice this bug makes Linux inusable in a laptop with video intel (most thinkpad and others), without suspend option or data lost.

The intel oficcial page por these drivers:
http://www.intellinuxgraphics.org/download.html