[Bug 102322] System crashes after "[drm] IP block:gmc_v8_0 is hung!" / [drm] IP block:sdma_v3_0 is hung!

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=102322

--- Comment #8 from Andrey Grodzovsky <andrey.grodzovsky at amd.com> ---
(In reply to dwagner from comment #7)
> (In reply to Andrey Grodzovsky from comment #6)
> > Verify you are using latest AMD firmware and up to date MESA/LLVM
> 
> Firmware:
> 
> pacman -Q linux-firmware
> linux-firmware 20180606.d114732-1
> 
> ll  /usr/lib/firmware/amdgpu/vega10_vce.bin
> -rw-r--r-- 1 root root 165344 Jun  7 08:01
> /usr/lib/firmware/amdgpu/vega10_vce.bin
> 
> 
> MESA:
> 
> pacman -Q mesa
> mesa 18.1.2-1
> 
> 
> LLVM:
> pacman -Q llvm-libs
> llvm-libs 6.0.0-4
> 
> Is this new enough?

The kernel and MESA seems new enough, LLVM is 6 so maybe you should try 7.
The firmware also looks pretty late but I still would advise to manually
override all firmware files with files from here
https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/tree/amdgpu
Just backup your existing firmware/amdgpu folder for any case.

> 
> 
> BTW: In a forum somebody asked what the dmesg output on crash looked like if
> I enabled amdgpu.gpu_recovery=1 - the result is a few lines more of output,
> but still a fatal system crash:
> 
> Jun 26 00:50:09 ryzen kernel: [drm:amdgpu_job_timedout [amdgpu]] *ERROR*
> ring gfx timeout, last signaled seq=12277, last emitted seq=12279
> Jun 26 00:50:09 ryzen kernel: [drm] IP block:gmc_v8_0 is hung!
> Jun 26 00:50:09 ryzen kernel: [drm] IP block:gfx_v8_0 is hung!
> Jun 26 00:50:09 ryzen kernel: amdgpu 0000:0a:00.0: GPU reset begin!
> Jun 26 00:50:15 ryzen kernel: [drm:drm_atomic_helper_wait_for_flip_done
> [drm_kms_helper]] *ERROR* [CRTC:42:crtc-0] flip_done timed out
> Jun 26 00:50:15 ryzen kernel: [drm:drm_atomic_helper_wait_for_dependencies
> [drm_kms_helper]] *ERROR* [CRTC:42:crtc-0] flip_done timed out
> Jun 26 00:50:25 ryzen kernel: [drm:drm_atomic_helper_wait_for_dependencies
> [drm_kms_helper]] *ERROR* [PLANE:40:plane-4] flip_done timed out

It's a know issue, try the patch I attached to resolve the deadlock , but you
will probably experience other failures after that anyway. 

Andrey

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