https://bugs.freedesktop.org/show_bug.cgi?id=105833

Bug ID: 105833 Summary: RX Vega 56 hangs immediately after start gdm Product: DRI Version: XOrg git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: mikhail.v.gavrilov@gmail.com

Created attachment 138461 --> https://bugs.freedesktop.org/attachment.cgi?id=138461&action=edit 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.

1. install Fedora 27. https://download.fedoraproject.org/pub/fedora/linux/releases/27/Workstation/... 2. install latest MESA and LLVM https://copr.fedorainfracloud.org/coprs/che/mesa/ 3. 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.