Comment # 21
on bug 105018
from L.S.S.
Another problem: When I woke up the screen, sometimes the system would have intermittent soft lockups that made the system kind of unusable... This is after I included the patch to the latest 4.15 kernel, 4.15.5 (4.15.5-1-MANJARO) In journalctl I find the following phenomenon. During its sleep the error "failed to get VBLANK" is being written every 20s. Feb 27 11:57:29 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! Feb 27 11:57:49 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! Feb 27 11:58:09 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! Feb 27 11:58:29 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! Feb 27 11:58:49 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! Feb 27 11:59:09 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! Feb 27 11:59:29 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! Feb 27 11:59:49 linuxsys kernel: [drm:dm_logger_write [amdgpu]] *ERROR* Failed to get VBLANK! After I woke the screen up and I get the intermittent soft lockup issue, the error "dc_stream_state is NULL for crtc '1'" is written multiple times from either dm_vblank_get_counter or dm_crtc_get_scanoutpos every 8 or 18 seconds, which seemed to correspond to the lockup interval. I did not test the issue further as the system was almost unusable due to the lockup and I had to reboot. Feb 27 12:17:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:08 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:08 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:16 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:16 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:16 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:16 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:16 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:16 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:34 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:34 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:34 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:34 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:34 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:34 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:42 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:42 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:42 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:42 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:42 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:17:42 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:00 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:00 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:00 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:00 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:00 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:00 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:08 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:08 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:08 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! ... Feb 27 12:18:26 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:26 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:26 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:26 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:26 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:26 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:35 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:35 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:35 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:35 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:35 linuxsys kernel: [drm:dm_crtc_get_scanoutpos [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Feb 27 12:18:35 linuxsys kernel: [drm:dm_vblank_get_counter [amdgpu]] *ERROR* dc_stream_state is NULL for crtc '1'! Unfortunately, this issue is random and I could not always reproduce it. It just happens from time to time.
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