Created attachment 138777 [details]
Dmesg krnel boot with dc_log enabled

Fedora kernel: 4.17.0-0.rc0.git7.2.fc29.x86_64 (pre -rc1)

Boot options: 

root=UUID=c88abf6f-2561-41e5-bec5-c3b2881d0ffc ro rhgb slub_debug=-
cgroup_disable=memory console=tty0 console=ttyUSB0,9600n8 nmi_watchdog=0
audit=0 radeon.cik_support=0 amdgpu.cik_support=1 resume=/dev/sda7
i915.enable_rc6=1 i915.semaphores=1 i915.enable_psr=1 i915.enable_fbc=1
drm_kms_helper.poll=0 mce=off amdgpu.dc=1 amdgpu.dc_log=1

Note: BIOS is in dGPU only mode, so i915 is disabled.

both VGA and the LCD (LVDS) panel remain turned off, no display is available.


Attached is kernel dmesg and Xorg log files.