RX Vega 56 hangs immediately after start gdm
Submitted by Mikhail Gavrilov @Mikhail
Assigned to Default DRI bug account
Link to original bug (#105833)
Description
Created attachment 138461
dmesg
RX Vega 56 hangs immediately after start gdm
kernel: 4.16.0-rc7-git7b225300c716
mesa: 18.1.0-0.11.git6179a87
llvm: 7.0.0-0.1.r326462
Demonstration: https://youtu.be/uvsg36d9tZk
[ 23.005522] [drm:amdgpu_job_timedout [amdgpu]] ERROR ring gfx timeout, last signaled seq=1, last emitted seq=5
[ 23.005645] [drm] GPU recovery disabled.
[ 82.427656] sysrq: SysRq : Show Blocked State
[ 82.427950] task PC stack pid father
[ 121.856551] sysrq: SysRq : Show Blocked State
[ 121.856576] task PC stack pid father
[ 257.886375] sysrq: SysRq : Show Blocked State
[ 257.886399] task PC stack pid father
This is very similar to previous bugs:
[1] https://bugs.freedesktop.org/show_bug.cgi?id=105317
[2] https://bugs.freedesktop.org/show_bug.cgi?id=104001
but not needed make any action for hung occurs. It happens immediately after start graphic mode in Linux.
- install Fedora 27.
https://download.fedoraproject.org/pub/fedora/linux/releases/27/Workstation/x86_64/iso/Fedora-Workstation-Live-x86_64-27-1.6.iso
- install latest MESA and LLVM
https://copr.fedorainfracloud.org/coprs/che/mesa/
- build and install staging kernel with latest amdgpu driver
$ git clone git://people.freedesktop.org/~agd5f/linux --branch drm-next-4.17-wip
$ cd linux
$ make clean && make bzImage && make modules
make modules_install && make install
Reproducing issue:
1. Try to boot computer with the newly builded kernel.
Symptoms:
1. The system stop to respod.
2. All the LEDs on the video card showing the load start to glow.
3. The turbine on the video card starts to make a lot of noise.
In dmesg appears follow lines:
[drm:amdgpu_job_timedout [amdgpu]] *ERROR* ring gfx timeout, last signaled seq=1, last emitted seq=5
[drm] GPU recovery disabled.
**Attachment 138461**, "dmesg":
dmesg.txt