[Nouveau] [Bug 104897] New: nouveau memory allocation issue causes screen distortions under KDE

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=104897

            Bug ID: 104897
           Summary: nouveau memory allocation issue causes screen
                    distortions under KDE
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: Driver/nouveau
          Assignee: nouveau at lists.freedesktop.org
          Reporter: estellnb at elstel.org
        QA Contact: xorg-team at lists.x.org

Created attachment 137106
  --> https://bugs.freedesktop.org/attachment.cgi?id=137106&action=edit
screenshot

Working under mesa-common-dev 13.0.6-1+b2, plasma-workspace 4:5.8.6-2.1, Xorg
1.19.2 and kernel 4.15.0-rc9+ I do get weird screen distortions under KDE as
soon as I enable my external 4K display. As KDE runs stable and fine with my
integrated display in a much lower resolution I would guess this to be a memory
allocation issue of nouveau. Other less memory intense desktop environments
like Xfce still run fine under 4K. The issue is known since long (see also the
KDE bug: https://bugs.kde.org/show_bug.cgi?id=368275)

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