On Wed, Nov 10, 2021 at 04:27:39PM +0000, Mark Boddington wrote: > Hi all, > > I run the mainline Linux kernel on Ubuntu 20.04, built from > https://kernel.ubuntu.com/~kernel-ppa/mainline/v5.15.1/ > > There appears to be a regression in 5.15.1 which causes the GPU to fail to > resume after power saving. > > Could it be this change??: > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c?h=v5.15.1&id=8af3a335b5531ca3df0920b1cca43e456cd110ad If you revert it, does it solve the problem for you? If not, what kernel version did work for you with this hardware? thanks, greg k-h
