Bug 23432

Summary: resume from suspend hangs on everex stepnote sa2053
Product: Power Management Reporter: tomas m (tmezzadra)
Component: Hibernation/SuspendAssignee: power-management_other
Status: CLOSED UNREPRODUCIBLE    
Severity: normal CC: florian, maciej.rutecki, rjw
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: 2.6.37-rc2 Subsystem:
Regression: Yes Bisected commit-id:
Bug Depends on:    
Bug Blocks: 7216, 21782    
Attachments: git bisect incomplete.

Description tomas m 2010-11-21 13:32:05 UTC 
Created attachment 37802 [details]
git bisect incomplete.

2.6.37-rc1 works fine.
2.6.37-rc2 fails.

i tried to bisect this but i got to a point where the system would hang before suspend. skipping patches got me nowhere.

Bisecting: 39 revisions left to test after this (roughly 5 steps)

im attaching the bisect log just it case it proves useful.

the system is an everex stepnote sa2053t.
it had several issues concerning suspend/resume in the past. but this one is a bit different.

see: https://bugzilla.kernel.org/show_bug.cgi?id=16396
and  https://bugzilla.kernel.org/show_bug.cgi?id=19422

when this system tries to come back to life. it shows an empty terminal with a stuck cursor. sysrq-REISUB reboots the system.
Comment 1 Rafael J. Wysocki 2010-12-02 20:42:03 UTC 
1. Does the problem also happen in the minimum config, ie. when booted with
   init=/bin/bash ?

2. The only commit I can think may cause this problem to happen from the
   first sight is 48fcfc8 (i915: reprogram power monitoring registers on resume).
   Can you try to revert it and see if that helps, please?
Comment 2 tomas m 2010-12-05 21:27:13 UTC 
(In reply to comment #1)
> 1. Does the problem also happen in the minimum config, ie. when booted with
>    init=/bin/bash ?

yes it does work issuing an echo mem > /sys/power/state

> 
> 2. The only commit I can think may cause this problem to happen from the
>    first sight is 48fcfc8 (i915: reprogram power monitoring registers on
> resume).
>    Can you try to revert it and see if that helps, please?

i did revert this on rc3 but it didnt help.
Comment 3 tomas m 2010-12-05 21:28:49 UTC 
(In reply to comment #1)
> 1. Does the problem also happen in the minimum config, ie. when booted with
>    init=/bin/bash ?

yes it does work issuing an echo mem > /sys/power/state

> 
> 2. The only commit I can think may cause this problem to happen from the
>    first sight is 48fcfc8 (i915: reprogram power monitoring registers on
> resume).
>    Can you try to revert it and see if that helps, please?

i did revert this on rc3 but it didnt help.
Comment 4 tomas m 2010-12-07 10:33:34 UTC 
apparently this got fixed in rc4.

will do more testing in the week, but i guess you can close this for now.

thanks

Tomas
Comment 5 Florian Mickler 2010-12-17 01:08:45 UTC 
Thx. I'm closing this. Please reopen if necessary.