I've attached Xorg.0.good.log to show a good boot with kernel 4.18.20, and a Xorg.0.bad.log to show the failed boot with amd-wip-git. If you leave those options out amdgpu works, but things like resuming from suspend, etc. This only happens if you set amdgpu.dpm=1 and/or amdgpu.dc=1 with the bad kernels. In nay case, the error line is always the same:ĪMDGPU(0): drm report modesetting isn't supported. By the way, I've gotten a few logs before but lost them while debugging, however this time I had the sense to save it. However after compiling and testing the latest linux-amd-wip-git I was able to get a log so I can finally file a bug. Kernels before 4.19.x work great with amdgpu, but all kernels from 4.19.x on hang at boot, and usually don't even generate a boot log, no matter how long you wait. I'm running the latest Manjaro and have a Sapphire Nitro R9 390. Example of failed amdgpu boot with R9 390.
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