Re: Occasional (too common) suspend problem

["Rafael J. Wysocki" <rjw@sisk.pl>]

On Friday, January 21, 2011, Len Brown wrote:
> > 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()).
> 
> The thermal code failed to get the current
> temperature (via AML "_TMP" method) because
> the embedded controller (or our interface to it) malfunctioned.
> Likely the suspend issue has nothing to do with thermal per se,
> and thermal is effectively pointing out to us that the EC is unhappy.
> 
> Failures associated with the embedded controller are now
> by far the largest portion of unsolved mysteries
> in the Linux ACPI implementation and we need to focus
> on the EC in 2011.

Still, I don't really understand why that's happening while we're disabling
CPU1 on this machine.  The execution of AML certainly shouldn't take place at
this time.

Rafael