[Bug 78120] New: "[drm] stuck on render ring" when using Terminator

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78120

          Priority: medium
            Bug ID: 78120
                CC: intel-gfx-bugs at lists.freedesktop.org
          Assignee: intel-gfx-bugs at lists.freedesktop.org
           Summary: "[drm] stuck on render ring" when using Terminator
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
          Severity: normal
    Classification: Unclassified
                OS: Linux (All)
          Reporter: pukayana at openmailbox.org
          Hardware: x86-64 (AMD64)
            Status: NEW
           Version: XOrg CVS
         Component: DRM/Intel
           Product: DRI

Created attachment 98248
  --> https://bugs.freedesktop.org/attachment.cgi?id=98248&action=edit
cat /sys/class/drm/card0/error

There was a short freeze when using (the terminal emulator) Terminator. When
starting it from command line it crashes at some point with the following
message:
python2: cairo-scaled-font.c:459: _cairo_scaled_glyph_page_destroy: Assertion
`!scaled_font->cache_frozen' failed.
[1]    26494 abort (core dumped)  terminator

I am on Arch Linux, but it's not completely vanilla, so I'll give you what I
think might or might not be important details:

- Kernel with ck-patchset

- Fontconfig infinality (
https://wiki.archlinux.org/index.php/Infinality-bundle )

- Compositor compton

dmesg doesn't really tell much:

[ 4000.214394] [drm] stuck on render ring
[ 4000.214395] [drm] GPU crash dump saved to /sys/class/drm/card0/error
[ 4000.214396] [drm] GPU hangs can indicate a bug anywhere in the entire gfx
stack, including userspace.
[ 4000.214396] [drm] Please file a _new_ bug report on bugs.freedesktop.org
against DRI -> DRM/Intel
[ 4000.214396] [drm] drm/i915 developers can then reassign to the right
component if it's not a kernel issue.
[ 4000.214396] [drm] The gpu crash dump is required to analyze gpu hangs, so
please always attach it.

Before and after nothing related to the freeze.

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