So I have one remaining problem on my nasty EeePC problem child
computer, and this one I cannot bisect simply because it's so flaky.
The exact same kernel may suspend and resume many many times in a row,
and then I reboot it, and it hangs on the first suspend. Very
occasionally the machine comes back when I press a key, and resumes
ok. Most of the time it does not - it's just dead to the world, and
there are no logs to go by. I even tried pm_trace, and that didn't get
me anywhere, although I once got a hash match:
hash matches drivers/base/power/main.c:555
which is the last part of a deivice_resume(), but none of the devices
matched, so that didn't really give any information at all.
So I have very little to go on.
However, at least one time when it failed and came back (remember:
very rare), I did get that suspend sequence printouts logged. Here's a
_good_ suspend:
...
[ 79.596367] PM: Saving platform NVS memory
[ 79.596378] Disabling non-boot CPUs ...
[ 79.700053] CPU 1 is now offline
[ 79.700565] PM: Restoring platform NVS memory
[ 79.700565] Enabling non-boot CPUs ...
[ 79.700565] Booting Node 0 Processor 1 APIC 0x1
[ 79.597894] Initializing CPU#1
...
and here's the one that failed and then ended up coming back on a keypress:
...
[ 54.628375] PM: Saving platform NVS memory
[ 54.628387] Disabling non-boot CPUs ...
[ 63.554966] ACPI Exception: AE_BAD_PARAMETER, Returned by Handler
for [EmbeddedControl] (20110112/evregion-474)
[ 63.554992] ACPI Error: Method parse/execution failed
[\_SB_.PCI0.SBRG.EC0_.RCTP] (Node f5c2dea0), AE_BAD_PARAMETER
(20110112/psparse-536)
[ 63.555022] ACPI Error: Method parse/execution failed
[\_TZ_.RTMP] (Node f5c32fa8), AE_BAD_PARAMETER (20110112/psparse-536)
[ 63.555047] ACPI Error: Method parse/execution failed
[\_TZ_.TZ00._TMP] (Node f5c34018), AE_BAD_PARAMETER
(20110112/psparse-536)
[ 63.555079] Thermal: failed to read out thermal zone 0
[ 63.556361] CPU 1 is now offline
[ 63.556944] PM: Restoring platform NVS memory
[ 63.556944] Enabling non-boot CPUs ...
[ 63.556944] Booting Node 0 Processor 1 APIC 0x1
[ 63.556279] Initializing CPU#1
...
which really doesn't tell me much, except that clearly something in
ACPI-land is unhappy, and it looks thermal-related (that last error
message comes from thermal_zone_device_update()).
Any ideas?
Linus
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