[Bug 592780] Re: [Lucid] kernel suspend + resume works only once, 2nd timesystem freezes

[ingo]

I tried to further pin down to find the root cause:

Stepwise test of suspend (s2ram) done with this configuration:

Single user mode
Boot-parameter: no_console_suspend usbcore.autosuspend=-1 i8042.nopnp

cat decices > /sys/power/pm_test
cat mem > /sys/power/state
	performs/resumes correctly many times without any problems

cat platform > /sys/power/pm_test
cat mem > /sys/power/state
	performs/resumes correctly once, second time during suspend I get this output and system hangs:

Freezing user space processes ... (elapsed 00.0 s) done
Freezing remaining tasks ... (elapsed 00.0 s) done
sd 1:0:0:0: [sdb] Stopping disk
sd 0:0:0:0: [sda] Synchronizing SCSI cache
sd 0:0:0:0: [sda] Stopping disk
serial 00:09: disabled
[drm] nouveau 0000:07:00.0: Evicting buffers ...
[drm] nouveau 0000:07:00.0: Idling channels ...
[drm] nouveau 0000:07:00.0: Suspending GPU objects ...
[drm] nouveau 0000:07:00.0: And we're gone!

I am unable to get any further output on the console.


Next I checked the DSDT table (extracted from proc filesystem):
cat /proc/acpi/dsdt > mydsdt.bin

dis-assemled it with the Intel compiler:
iasl -d mydsdt.bin

re-assembled it.
iasl -sa mydsdt.dsl

During that assembly I got 5 warnings:

Intel ACPI Component Architecture
ASL Optimizing Compiler version 20061109 [May 16 2007]
Copyright (C) 2000 - 2006 Intel Corporation
Supports ACPI Specification Revision 3.0a

mydsdt.dsl   387:     Method (\_WAK, 1, NotSerialized)
Warning  1079 -                   ^ Reserved method must return a value (_WAK)

mydsdt.dsl  4418:                 Method (RVLT, 1, NotSerialized)
Warning  1086 -                              ^ Not all control paths return a value (RVLT)

mydsdt.dsl  4546:                 Method (RTMP, 1, NotSerialized)
Warning  1086 -                              ^ Not all control paths return a value (RTMP)

mydsdt.dsl  4737:                 Method (OCOP, 1, NotSerialized)
Warning  1086 -                              ^ Not all control paths return a value (OCOP)

mydsdt.dsl  6052:                 Method (GCQV, 1, NotSerialized)
Warning  1086 -                              ^ Not all control paths return a value (GCQV)

ASL Input:  mydsdt.dsl - 9644 lines, 306800 bytes, 4049 keywords
AML Output: mydsdt.aml - 33889 bytes 1137 named objects 2912 executable opcodes

Compilation complete. 0 Errors, 5 Warnings, 0 Remarks, 1214
Optimizations


For your further reference I do attach the dis-assembled DSDT-table here
for my ASUS M2N-E


Final remark: all is fine on same hardware with Hardy-amd64!

** Attachment added: "DSDT table for ASUS M2N-E"
   http://launchpadlibrarian.net/51736745/mydsdt.dsl

-- 
[Lucid] kernel suspend + resume works only once, 2nd timesystem freezes
https://bugs.launchpad.net/bugs/592780
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