[Bug 101093] New: i915: screen goes dark on modeswitch during boot (Failed to own the pwm chip)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101093

            Bug ID: 101093
           Summary: i915: screen goes dark on modeswitch during boot
                    (Failed to own the pwm chip)
           Product: DRI
           Version: XOrg git
          Hardware: x86 (IA32)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: sassmann at redhat.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 131413
  --> https://bugs.freedesktop.org/attachment.cgi?id=131413&action=edit
dmesg with debug enabled

With 4.12-rc1 the screen goes dark during boot when attempting to modeswitch. I
assume the backlight is turned off. Still worked with kernel 4.11. This is on a
baytrail tablet.

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