[Bug 102906] New: Violent glitches when screen turns on from "xset dpms force off" or from sleep

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102906

            Bug ID: 102906
           Summary: Violent glitches when screen turns on from "xset dpms
                    force off" or from sleep
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: aleksey at rybalkin.org
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 134384
  --> https://bugs.freedesktop.org/attachment.cgi?id=134384&action=edit
syslog from recorded session

I am experiencing some violent graphical glitches in situations when the screen
is turned back on after it went to sleep or after it was turned off with "xset
dpms force off". The glitches continue even after exiting the X into the
console.

hardware: Lenovo ThinkPad X250
cpu: Intel(R) Core(TM) i5-5200U CPU @ 2.20GHz
kernel: 4.13.3 vanilla
xorg-server: 1.19.3

Video of the glitches: https://www.youtube.com/watch?v=yvv0cHL4UyM

On the video glitches start only after sixth attempt to do "xset dpms force
off" while the debugging options "drm.debug=0xe log_bug_len=2M" are on. Without
these options glitches appear much more frequently (nearly every time). At the
end of the video I do exit the X server to reboot the system from console and
the glitches still continue in the console.

System log from the session on the video with "drm.debug=0xe log_bug_len=2M"
attached. During the activation of the glitches the error line
"[drm:intel_cpu_fifo_underrun_irq_handler] *ERROR* CPU pipe A FIFO underrun"
does appear.

As far as I remember this regression was introduced in kernel 4.12 (4.11 was
fine). I can test both, if needed.

Also, is this the right place for this bug report or should I create one on
kernel bugzilla?

Also might be related to https://bugs.freedesktop.org/show_bug.cgi?id=102587

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