https://bugzilla.kernel.org/show_bug.cgi?id=211807 --- Comment #10 from Nils Tonnätt (nils.tonnaett@xxxxxxxxx) --- I patched 5.14.5. I see now difference in behavior. When the screen stays black it often works to switch to a tty or turn off and on the display. Dmesg seems to became a little more verbose about this: [ 64.800268] [drm] DM_MST: stopping TM on aconnector: 000000007957d743 [id: 97] [ 64.820206] amdgpu 0000:09:00.0: [drm] Cannot find any crtc or sizes [ 66.970887] [drm] DM_MST: starting TM on aconnector: 000000007957d743 [id: 97] [ 67.173165] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8: DPCD read on addr 0x60 for 1 bytes NAKed [ 67.176906] [drm] fb mappable at 0x7C00502000 [ 67.176907] [drm] vram apper at 0x7C00000000 [ 67.176907] [drm] size 33177600 [ 67.176908] [drm] fb depth is 24 [ 67.176908] [drm] pitch is 15360 [ 67.176965] fbcon: amdgpu (fb0) is primary device [ 67.192813] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8: DPCD read on addr 0x60 for 1 bytes NAKed [ 67.670123] Console: switching to colour frame buffer device 480x135 [ 67.708683] amdgpu 0000:09:00.0: [drm] fb0: amdgpu frame buffer device [ 72.960002] rfkill: input handler disabled [ 73.139379] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8: DPCD read on addr 0x60 for 1 bytes NAKed [ 80.216335] rfkill: input handler enabled [ 80.534571] amdgpu 0000:09:00.0: [drm] *ERROR* mstb 00000000ca721b5e port 8: DPCD read on addr 0x60 for 1 bytes NAKed -- You may reply to this email to add a comment. You are receiving this mail because: You are watching the assignee of the bug.
