RX480 : random NULL pointer dereference on resume from suspend

Submitted by SET

Assigned to Default DRI bug account

Link to original bug (#111729)

Description

Created attachment 145421
Syslog data

Since kernel 5.2.x, resuming from suspend will randomly crash amdgpu/drm with a black screen. After login via SSH, rebooting or halting the host will not complete. A hard reset becomes unavoidable. Currently using 5.3.0-rc8, RX 480 with one single display. Stable 5.2.x kernels don't resolve the issue. The host does not last a week without a forced reboot.

Please see the attached syslog trace. Thanks.

Attachment 145421, "Syslog data":
amdgpu_syslog_00.txt