Jesse Barnes pointed me here. This problem seem to be related to i915 drm module.
I described and discussed the problem here:
I'm running debian lenny on an acer travelmate 290 with 855gm intel integrated video (debian stock kernel 2.6.26-1-686, Xorg: 7.3, intel driver 2.3.2)
Description of the problem:
Suspend to disk always works.
When using console (no X running) or X with vesa driver:
- suspend to ram works fine
When using intel driver:
- suspend to ram fails on every normal boot: laptop suspends but on resume system freezes with blank screen and no keyboard control
- suspend to ram works fine when resuming from disk: on a normal boot I invoke pm-hibernate; laptop suspends to disk; when I resume from disk suspend to ram works flawlessly every time I want
So the problem must be related to intel hardware. I was asked to produce a dump using intel_reg_dumper here:
and to file a bug in bugzilla.
Many thanks for your help,
Oops, how did this sit for a year without an update?
Does this behavior still happen? There have been many suspend/resume fixes since Oct. of last year...
I too have this problem with my Acer 290 running Debian Lenny. I can confirm that this problem still exists, but seems to work with newer Intel graphics drivers (version 2.6 upwards).
I would like to get it working properly with version 2.3 provided in Debian Lenny. After all, it works after a hibernate!
How can I help resolve this issue?
If it's fixed in 2.6 I'd consider it done. If someone from Debian wants to look at the changes between the two drivers and kernels and backport they're welcome to of course; I'm happy to answer questions too.