Bug 6091

Most recent kernel where this bug did not occur: no newer kernel tested
Distribution: Debian Linux
Hardware Environment: IBM ThinkPad T23, Pentium 3, 1.13 GHz, 384 MB RAM
Software Environment: Kernel 2.6.15.4 with sws2 patches

Problem Description: 
Suspend to RAM hangs hard on resume. Once I got a text display back (without 
any error message), but the other tries I simply got a black screen with three 
white pixels somewhere near the center of the display. The machine seems to be 
locked up completely.

Steps to reproduce:

1) build a 2.6.15.4 kernel with sws2-2.2 patches

Suspend to RAM worked okay with 2.6.14.4 + sws2.2-rc14 at least (which was my 
first sws2 kernel). So its probably not needed to use the sws2 patches.

If need be I look into compiling a kernel without sws2 to know for sure, but it 
make take quite a long time till I come to it.

2) echo mem > /sys/power/state

Also tried with my own suspend script which disables ALSA, USB ehci driver and 
some other stuff as well with "hibernate 
--config-file /etc/hibernate/ram.conf" (from Debian's hibernate package, 
slightly adapted to my needs)


This problem hasn't high priority for me since I don't use suspend to RAM 
anyway (except for testing whether bug #5600 has gone;-). Just wanted to report 
it. I will ask the guys on the linux-thinkpad mailing list whether they can 
reproduce this and point them to the bug number.

Regards,
Martin Steigerwald