[Bug 92698] New: [SKL] Displayport display not detected when hybrid laptop is in Intel IGP only mode.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=92698

            Bug ID: 92698
           Summary: [SKL] Displayport display not detected when hybrid
                    laptop is in Intel IGP only mode.
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: sarvatt at gmail.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Bug description: 

When plugging in a displayport monitor it is not detected on this Thinkpad P50.
It is an nvidia/intel hybrid, and displayport works fine when the nvidia gpu is
enabled, but not when it is running in IGP mode with the nvidia disabled. This
same problem exists in 4.2 and drm-intel-nightly 20151016, and is the same if
hotplugging or booting when it already plugged in.

System environment:
-- system architecture:  64 bit
-- kernel versions: drm-intel-nightly 20151016, 4.2.0
-- xf86-video-intel: 2:2.99.917-1~exp1ubuntu2.2~trusty1
-- Linux distribution: ubuntu 14.04.3
-- CPU: Intel(R) Xeon(R) CPU E3-1505M v5 @ 2.80GHz
-- GPU: Intel Corporation Device [8086:191b] (rev 06) (prog-if 00 [VGA
controller]) + NVIDIA Corporation Device [10de:13b0] (rev a2) (prog-if 00 [VGA
controller])
-- Display connector: eDP, DP.
-- Monitor: Dell E1715S

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