Created attachment 138461 [details] 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/x86_64/iso/Fedora-Workstation-Live-x86_64-27-1.6.iso 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.
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