https://bugzilla.kernel.org/show_bug.cgi?id=199749
--- Comment #6 from Andrey Grodzovsky (andrey.grodzovsky@amd.com) --- (In reply to James Le Cuirot from comment #4)
Not sure if this is related to bug #199653, which concerns freezing on the 2500U and 2700U. It hasn't received any attention from AMD or other kernels devs but there is more information that could potentially be useful. I tried amdgpu.vm_update_mode=3 but that didn't help.
Are you seeing sdma0 timeout message when the system freezes like muelladi above ? I expect amdgpu.vm_update_mode=3 to help only in that case.