[Bug 110506] New: i915 not handling the fake monitor well

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=110506

            Bug ID: 110506
           Summary: i915 not handling the fake monitor well
           Product: DRI
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: wiktor at metacode.biz
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Hello,

I'm using Dell TB dock to connect external monitor. fwupd service, that checks
for hardware components creates an extra fake monitor to probe information when
MST controller is powered up without a monitor plugged in. That causes a series
of flickers caused by the kernel graphics driver.

I've been asked to create this bug by fwupd maintainers as they believe it's
"i915 not handling the fake monitor well".

See: https://github.com/hughsie/fwupd/issues/1105#issuecomment-476206640 for
details.

Technical details (from
https://01.org/linuxgraphics/documentation/how-report-bugs):

uname -m: x86_64
uname -r: 5.0.9-arch1-1-ARCH
Linux distribution: Arch
Machine or mother board model: Dell XPS 13 9350
Display connector: DP through Thunderbolt dock.

If there is more info needed please do tell me. Sorry in advance if I did miss
something!

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