https://bugs.freedesktop.org/show_bug.cgi?id=105251 --- Comment #12 from Barry G --- My system (Threadripper, Vega 64) started exhibiting the same issue on 4.17. It will lock hard for me under IO. I have a custom python script that I run that does NFS IO off my X550 network card and then invokes imagemagick/convert to generate thumbnails. I wasn't experiencing issues on 4.16 personally. 4.17.5 locks 100% on running of the script with the attached ciri example dmesg. The only other system change I have made recently is the addition of the opencl-amd package in a failed attempt to make Divinci Resolve run (https://aur.archlinux.org/packages/opencl-amd/). My linux-firmware package is linux-firmware-git 20171125.17e6288-1. There might be a better way to get the firmware version from the card itself, but I don't possess such knowledge (yet). Barry -- You are receiving this mail because: You are the assignee for the bug.