On 14.04.2018 00:24, Bráulio Bhavamitra wrote:
It ALWAYS crashes on shader15 of http://www.graphicsfuzz.com/benchmark/android-v1.html.

This is very likely an unrelated issue to any kind of desktop hang you're seeing. The graphics fuzz shaders are the result of fuzzing to intentionally generate unusual control flow structures which are likely to trigger shader compiler bugs. Typical desktop workloads don't have such shaders, so any generic desktop hang you're seeing is almost certainly unrelated.

Cheers,
Nicolai



Also reported at https://bugzilla.redhat.com/show_bug.cgi?id=1562530

Using kernel 4.16 with options rcu_nocb=0-15 and amdgpu.dpm=0

Cheers,
Bráulio

On Mon, Mar 26, 2018 at 8:30 PM Bráulio Bhavamitra <brauli...@gmail.com <mailto:brauli...@gmail.com>> wrote:

    Hi all,

    Following the random crashes happenning with many users (e.g.
    
https://www.phoronix.com/scan.php?page=news_item&px=Raven-Ridge-March-Update),
    not only on Linux but also Windows, I've been struggling to
    reproduce and generate any error log.

    After discovering that the error only happenned with KDE and games
    (at least for me, see https://bugs.kde.org/show_bug.cgi?id=392378),
    I could reproduce after a failing suspend.

    The crash most of the times allows the mouse to keep moving, but
    anything else works. Except for this time the keyboard worked so I
    could switch the tty and save the dmesg messages. After this I had
    to force reboot as it got stuck trying to kill the lightdm service
    (gpu hanged?).

    The errors are, see attached the full dmesg:
    [ 2899.525650] amdgpu 0000:03:00.0: couldn't schedule ib on ring <sdma0>
    [ 2899.525769] [drm:amdgpu_job_run [amdgpu]] *ERROR* Error
    scheduling IBs (-22)
    [ 2909.125047] [drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx
    timeout, last signaled seq=174624, last emitted seq=174627
    [ 2909.125060] [drm] IP block:psp is hung!
    [ 2909.125063] [drm] GPU recovery disabled.
    [ 2914.756931] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR*
    amdgpu_cs_list_validate(validated) failed.
    [ 2914.756997] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to
    process the buffer list -16!
    [ 2914.997372] amdgpu 0000:03:00.0: couldn't schedule ib on ring <sdma0>
    [ 2914.997498] [drm:amdgpu_job_run [amdgpu]] *ERROR* Error
    scheduling IBs (-22)
    [ 2930.117275] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR*
    amdgpu_cs_list_validate(validated) failed.
    [ 2930.117405] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to
    process the buffer list -16!
    [ 2930.152015] [drm:amdgpu_fill_buffer [amdgpu]] *ERROR* Trying to
    clear memory with ring turned off.
    [ 2930.157940] [drm:amdgpu_fill_buffer [amdgpu]] *ERROR* Trying to
    clear memory with ring turned off.
    [ 2930.180535] [drm:amdgpu_fill_buffer [amdgpu]] *ERROR* Trying to
    clear memory with ring turned off.
    [ 2933.781692] IPv6: ADDRCONF(NETDEV_CHANGE): wlp2s0: link becomes ready
    [ 2945.477205] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR*
    amdgpu_cs_list_validate(validated) failed.
    [ 2945.477348] [drm:amdgpu_cs_ioctl [amdgpu]] *ERROR* Failed to
    process the buffer list -16!

    System details:
    HP Envy x360 Ryzen 2500U
    ArchLinux, kernel 4.16rc6 and 4.15.12

    Cheers,
    bráulio



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