[Bug 196291] New: amdgpu: Freeze because of syscall not returning

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=196291

            Bug ID: 196291
           Summary: amdgpu: Freeze because of syscall not returning
           Product: Drivers
           Version: 2.5
    Kernel Version: 4.11.8
          Hardware: x86-64
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: tobi291019@gmail.com
        Regression: No

Created attachment 257397
  --> https://bugzilla.kernel.org/attachment.cgi?id=257397&action=edit
dmesg with lockup warning at the end

An amdgpu syscall, called by plasmashell, appears to deadlock randomly and
freeze X.org completely. Several graphics processes, plasmashell and X.org are
left stuck in D-State. Everything else continues to operate correctly,
including audio, networking, etc..

The issue seems to appear more frequently whilst running games, although I am
unable to find any particular pattern to it.

Running Arch Linux with a custom compiled linux-zen kernel (with ACS override
patches) and ZFS, although as far as I can tell those are not related to the
issue, Mesa 17.1.4 with Radeon RX 480. The issue has been around for a while
and I sadly do not remember when it first occured, but definitely the entire
4.11.x lineup is affected and I am fairly sure 4.10.x was as well. The issue is
way too rare though for me to bisect the exact cause however.

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