[Bug 75401] New: When laptop monitor is turned off it periodically turns on for a fraction of a second

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75401

          Priority: medium
            Bug ID: 75401
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: When laptop monitor is turned off it periodically
                    turns on for a fraction of a second
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: grebator at gmail.com
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: unspecified
         Component: DRM/Intel
           Product: DRI

Created attachment 94600
  --> https://bugs.freedesktop.org/attachment.cgi?id=94600&action=edit
dmesg output when my laptop monitor is switched off

I have Lenovo W540 with Arch Linux. My laptop monitor slightly flashes every
three seconds when it's turned off. This happens every time either when I
connect an external display and turn off my laptop monitor or when I don't have
any external monitor connected and my laptop monitor turns off (e.g. when I
lock the screen). However, this doesn't happen in the opposite case when the
external monitor is turned off and my laptop monitor is turned on.

>From dmesg output I can see that a call to drm:ironlake_panel_vdd_off_sync is
initiated every three seconds and thus most probably this bug is related to
that call.

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