[Bug 62724] New: SNA: corrupted output after changing xrandr mode

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=62724

          Priority: medium
            Bug ID: 62724
          Assignee: chris at chris-wilson.co.uk
           Summary: SNA: corrupted output after changing xrandr mode
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: All
          Reporter: tiagomatos at gmail.com
          Hardware: Other
            Status: NEW
           Version: git
         Component: Driver/intel
           Product: xorg

Created attachment 76996
  --> https://bugs.freedesktop.org/attachment.cgi?id=76996&action=edit
Messed up output picture

Been using SNA on intel SNB hardware for a while now and and just updated to
2.21.5. Seems like the output gets messed up when I log in to GNOME and it
changes the xrandr configuration. Switching to UXA works around it.

The framebuffer seems to be fine since taking a screenshot yields a perfectly
normal looking desktop but what actually gets sent to the monitor is different,
see the attached pic.

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