[Bug 86697] [BSW] System fail to enter S4 at the second cycle to execute "echo disk > /sys/power/state" command

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=86697

wendy.wang at intel.com changed:

           What    |Removed                     |Added
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             Status|NEEDINFO                    |ASSIGNED

--- Comment #4 from wendy.wang at intel.com ---
Helo Ville,
We are having problem to upgrade BIOS to V43 on BSW fab1 or fab2: because of
once upgrade BIOS to V43, we always see board debug LED show 0000 and cannot
boot up system and we are still under analysis.

Then double checked S4 behavior again:

Fab2+ V41.0 BIOS or Fab2+V40.0 BIOS,
Second cycle to execute S4 command"echo disk > /sys/power/state", we did see
the system cannot enter S4 failure.

And disable the i915 display via "modprobe.blacklist=i915" parameter,can
successfully multi-times to put system enter into S4, there is no S4 problem.

I attached S4-fail-dmesg.log and S4-good-dmesg-i915-disable.log for your
analysis.

Fab1 board+ V41.0 BIOS has the same S4 failures as FAB2.

I'm not sure if this is the regression now, as I have not find a workable
Kernel right now.

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