[Bug 106250] New: Regression with Dell TB16 dock and Linux kernel 4.16.x

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=106250

            Bug ID: 106250
           Summary: Regression with Dell TB16 dock and Linux kernel 4.16.x
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: patrik.flykt at linux.intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Dell XPS13 connected via Thunderbolt to Dell TB16 docking station as described
in bug #103645 is showing a regression when running a 4.16.[1234] kernel.
Symptoms are a black power saved monitor connected to the DP output of TB16
after connecting the docking station. Keyboard connected via the docking
station still works, so Thunderbolt itself is working fine. The patch from bug
#104425 was tried out, but did not make any difference to the DP connected
monitor.

Kernel 4.15.x works just fine (or as fine it can work taking into account bug
#103645) with the DP monitor connected.

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