[Bug 85864] New: Periodic font rendering bug on Radeon HD 8570

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=85864

            Bug ID: 85864
           Summary: Periodic font rendering bug on Radeon HD 8570
           Product: xorg
           Version: unspecified
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Driver/Radeon
          Assignee: xorg-driver-ati at lists.x.org
          Reporter: jonathan.p.schuster at gmail.com
        QA Contact: xorg-team at lists.x.org

I'm running into an issue where every now and then, all instances of a
particular character in a window are rendered incorrectly. For instance, see
http://imgur.com/crvPOM6 (note that "a" does not render properly).

This only happened as of the upgrade to 7.5 (specifically, using the most
recent version of this package on Arch: 
https://www.archlinux.org/packages/extra/x86_64/xf86-video-ati/).

I'm using a Radeon HD 8570 / R7 240.

I've found what seem to be other instances of users reporting the bug in Arch
Linux. Some are reporting that it seems specific to GTK apps:
https://bbs.archlinux.org/viewtopic.php?id=186783
https://bbs.archlinux.org/viewtopic.php?id=187100
https://bbs.archlinux.org/viewtopic.php?pid=1472456

I've downgraded to 7.4 for now, and so far it seems to have fixed the issue.

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