https://bugs.freedesktop.org/show_bug.cgi?id=103370
--- Comment #37 from Robert Liu tsunghanliu@gmail.com --- (In reply to Robert Liu from comment #36)
BTW, with 4.13.0-16-generic, I change the max_sclk in drm/radeon/si_dpm.c (what we did with Ubuntu kernel 4.4.0-101-generic) from 75000 to 65000, but still met the hang issue.
By restricting max_sclk to 65000 and max_mclk to 80000, both radeon and amdgpu do not have the issue.