[Bug 83094] [BDW] System dmesg contains "ERROR" when machine resumes from s3

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=83094

--- Comment #11 from Guo Jinxian <jinxianx.guo at intel.com> ---
Created attachment 107532
  --> https://bugs.freedesktop.org/attachment.cgi?id=107532&action=edit
dmesg

(In reply to Paulo Zanoni from comment #10)
> Created attachment 107437 [details] [review]
> Possible fix
> 
> Hi
> 
> Does this patch fix the problem?
> 
> Thanks,
> Paulo

The dmesg error still able to reproduce with this patch.

root at x-bdw05:~#  echo 0 > /sys/class/rtc/rtc0/wakealarm ; echo +10 >
/sys/class/rtc/rtc0/wakealarm; echo mem > /sys/power/state
root at x-bdw05:~#
root at x-bdw05:~# dmesg -r|egrep "<[1-4]>"|grep drm
<3>[  669.801135] [drm:hsw_unclaimed_reg_detect] *ERROR* Unclaimed register
detected. Please use the i915.mmio_debug=1 to debug this problem.

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