[Bug 100821] New: Black external monitor after resume from suspend

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=100821

            Bug ID: 100821
           Summary: Black external monitor after resume from suspend
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.1.0
          Hardware: Intel
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: high
          Priority: P1
         Component: Video(DRI - Intel)
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: noga.dany at gmail.com
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: No

Created attachment 181661
  --> https://bugzilla.kernel.org/attachment.cgi?id=181661&action=edit
dmesg after suspend - resume

How to reproduce:
1) Dell Latitude E7450 with i7-5600U (HD Graphics 5500)
2) Notebook in dock station with external monitor connected
3) Everything ok
4) Suspend to ram
5) Resume from suspend
6) External screen connected via DVI is black

Environment:
1) until 3.17 is ok
2) from 3.18 to 4.0 external monitor is black after resume
3) from 4.1 external monitor blinks black every cca minute

Start monitor with xrandr again after resume works.



I am redirected here from report on openSUSE bugzilla:
https://bugzilla.opensuse.org/show_bug.cgi?id=936308

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