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.burgme...@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)
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