Re: Occasional (too common) suspend problem

[Zhang Rui <rui.zhang@intel.com>]

On Fri, 2011-01-21 at 12:50 +0800, Linus Torvalds wrote:
> 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

is this a 2.6.38-rc1 regression?
can you attach the acpidump output of this machine?

thanks,
rui