http://bugzilla.kernel.org/show_bug.cgi?id=6133
Summary: hang on resume from suspend to ram when using vga=0x305
on ThinkPad T23
Kernel Version: 2.6.15.4
Status: NEW
Severity: normal
Owner: [EMAIL PROTECTED]
Submitter: [EMAIL PROTECTED]
Most recent kernel where this bug did not occur: no later kernel tested
Distribution: Debian Etch/Sid
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.
When I tell grub not to use vga=0x305 as kernel boot parameter the resume works
okay.
Steps to reproduce:
1) Have a similar hardware (probably), my T23 has a SuperSavage chip, but
savagefb is not compiled into the kernel due to conflict with savage DRI
driver.
2) use 2.6.15.4 + sws2-2.2 (I doubt it comes from there, but I can try without
if needed and I find time) + my kernel configuration (attached to this bug)
3) use vga=0x305 as kernel boot parameter
4) try suspend to RAM... either
a) by hibernate with ram.conf or
b) by simple script which disabled ALSA, ISDN, unload ehci and then calls: echo
mem > /sys/power/state
c) Not tested, but I think sufficient should be just doing: echo mem
> /sys/power/state
Earlier on I thought that resume hang would be a regression of 2.6.15.4 (see
bug #6091), but I am not sure about this any longer. Maybe this problem
happened with older kernels as well. I did not use the vga parameter for a long
time and probably, I do not remember exactly anymore, this was the reason. I
can try with some older kernel if need be, I at least have 2.6.11-2.6.14 as
self compiled debian packages here, some with and some without sws2 patches.
Closing bug #6091 in favor of this one.
Regards,
Martin Steigerwald
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