[ltp] Re: immediate resume from suspend

[Vitus Jensen]

Am Fri, 24 Oct 2008 22:53:19 +0000 schrieb Vitus Jensen:

> After a patch enabled my Thinkpad R51e (1843-6NG) to generate ACPI
> events and react to the Fn-keys (see
> http://bugzilla.kernel.org/show_bug.cgi? id=8246), I'm experiencing
> problems getting the R51e to suspend probably: after boot the first time
> suspend works, every other time the Thinkpad immediately resumes.  No
> other issues, it just won't suspend anymore.  Do a reboot and you will
> get it to do a single suspend.

...
> * after return from acpi_enter_sleep_state() acpi_get_event_status()
>   reports that the state for event 1 and 2 is set.  Whichever this
>   means, but it's the same for every suspend try.
> 
> I will try to understand which events those are and whether I can
> disable one or both and see how this affects things.  But as I said, any
> hint is welcome!

Hmm, that was fast.  See output of acpitool -w:

   Device       S-state   Status   Sysfs node
  ---------------------------------------
  1. LID          S3    *enabled
  2. SLPB         S3    *enabled
  3. PB2          S4     disabled
  4. PB3          S4     disabled
  5. PB4          S4     disabled  pci:0000:00:04.0
  6. PB5          S4     disabled
  7. PB6          S4     disabled  pci:0000:00:06.0
  8. PB7          S4     disabled
  9. P2P          S4     disabled  pci:0000:00:14.4
  10. USB0        S3     disabled  pci:0000:00:13.0
  11. USB1        S3     disabled  pci:0000:00:13.1
  12. USB2        S3     disabled  pci:0000:00:13.2
  13. AC9M        S3     disabled

It lists 2 wakeup sources.  When I disable one:

asterix ~ # acpitool -W 1
  Changed status for wakeup device #1 (LID      )

   Device       S-state   Status   Sysfs node
  ---------------------------------------
  1. LID          S3    *disabled
  2. SLPB         S3    *disabled
  3. PB2          S4     disabled
  4. PB3          S4     disabled
...

Both get disabled.  And ... tataa! ... the R51e stays in suspend every 
time :-)  One can't any longer wakeup via Fn key but has to use the power 
button.  This is no big problem.

I love thinkpads :-D

By[t]e,
   Vitus
-- 
Vitus Jensen, Hannover, Germany, Earth, Milky Way, Universe (current)