[Bug 94299] New: Missing secondary display with Kernel 4.4 on Sandybridge

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94299

            Bug ID: 94299
           Summary: Missing secondary display with Kernel 4.4 on
                    Sandybridge
           Product: DRI
           Version: XOrg git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: kairo at kairo.at
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Created attachment 121970
  --> https://bugs.freedesktop.org/attachment.cgi?id=121970&action=edit
dmesg, kernel 4.4.0

With the openSUSE Tumbleweed update to kernel 4.4, my secondary display went
dark.
This is on a Sandybridge graphics system (i7-2600K) with an Intel mainboard
(DH67CL), the same problem persists with 4.4.1 and 4.5-rc1 kernels from OBS
(Kernel:Stable and Kernel:HEAD), while a 4.3.3 from home:tiwai:kernel:4.3 makes
the display connected to "HDMI2" (actually the DVI connector) work again fine -
the main display on "HDMI1" (HDMI connector of the mainboard) works fine with
all those kernel variants.

I'm attaching dmesg and xrandr --verbose output for both 4.4.0 and 4.3.3
kernels.

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