[Bug 93230] New: eDP brightness flicker when you control it(also HDMI plugged), and return from S3 fails

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93230

            Bug ID: 93230
           Summary: eDP brightness flicker when you control it(also HDMI
                    plugged), and return from S3 fails
           Product: DRI
           Version: DRI git
          Hardware: All
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: marco.delmastro at seco.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 120305
  --> https://bugs.freedesktop.org/attachment.cgi?id=120305&action=edit
dmesg file

I have a board based on Intel Atom E38xx (Bay Trail), if I plug HDMI/DP and an
eDP, when I control the brightness value, I see some flicker on eDP.
Other problem is about S3 state(standby), when I return from standby, the eDP
is off and my board freezes.

If I plug only the eDP, I don't see any bug, the brightness control works fine
and the S3 state works fine.

System information :
- system architecture : i686
- kernel version : 4.4.0-rc2+
- linux ubuntu 15.10
- display connection : HDMI/DP and eDP

Attached:
- dmesg.txt
- xrandr.txt
- intel_reg_dumper.txt

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