Created attachment 286317 [details] dmesg 5.4.3 With a recent upgrade on Arch Linux, a bug came back which existed also several versions before. Starting lightdm just results in a blank screen and switching to a terminal also fails then. Booting with dc=0 works.
Xorg logs: 21.247] (WW) AMDGPU(0): No outputs definitely connected, trying again... [ 21.247] (II) AMDGPU(0): Output DisplayPort-0 disconnected [ 21.247] (II) AMDGPU(0): Output HDMI-A-0 disconnected [ 21.247] (II) AMDGPU(0): Output DVI-D-0 disconnected [ 21.247] (WW) AMDGPU(0): Unable to find connected outputs - setting 1024x768 initial framebuffer```
Created attachment 286319 [details] xorg log
Created attachment 286321 [details] dmesg with amdgpu.dc_log=1 Enabling dc_log=1 shows similarities to #200695, but only with one monitor connected via HDMI. [ 19.548801] [drm:drm_client_modeset_probe [drm]] No connectors reported connected with modes [ 19.548809] [drm:drm_client_modeset_probe [drm]] connector 56 enabled? no [ 19.548816] [drm:drm_client_modeset_probe [drm]] connector 60 enabled? no [ 19.548823] [drm:drm_client_modeset_probe [drm]] connector 64 enabled? no [ 19.548831] [drm:drm_client_modeset_probe [drm]] Not using firmware configuration [ 19.548838] [drm:drm_client_modeset_probe [drm]] picking CRTCs for 16384x16384 config [ 19.548841] [drm] Cannot find any crtc or sizes
Issue was caused by a loose connection. Reinserted the HDMI cable and all is fine again.