https://bugs.freedesktop.org/show_bug.cgi?id=107823
Bug ID: 107823 Summary: [amdgpu/displayport] Blackscreen on native resolution Product: DRI Version: DRI git Hardware: Other OS: All Status: NEW Severity: normal Priority: medium Component: DRM/AMDgpu Assignee: dri-devel@lists.freedesktop.org Reporter: jan.burgmeier@unicon-software.com
Created attachment 141442 --> https://bugs.freedesktop.org/attachment.cgi?id=141442&action=edit dmesg with drm.debug=0x1e log_buf_len=1M
Hi,
there seems to be some monitor/graphics card combination which lead to a black screen. In my case it is the native (1920x1080) resolution of a NEC EA223WM monitor and a [AMD/ATI] Carrizo (rev 88). Setting any other mode than the native one via xrandr turns the monitor on. Setting it back to the native one results in a black screen. It seems unrelated to XOrg as there is also a black screen on the terminal and during boot. I do not see any errors in dmesg or XOrg log
The error does not occur with module parameter dc=0
Environment: Kernel: 4.19.0-rc2 (git master) Mesa: 18.1.6 XOrg: 1.20.1 amdgpu-ddx: 18.0.99 (git master)