Created attachment 1=
38831 [details]
Overscan issue on HP w2207h
With my HP w2207h monitor connected over HDMI, the image appears overscanne=
d,
it is cut off at the sides and is upscaled (see attached image, note how the
top bar is missing with dc=3D1). It is possible to fit the image inside the
monitor with xset --set underscan on and xset --set "underscan
{hborder,vborder}", but this results in a blurry display.
This occurs with a RX Vega 64 and an RX 560 with amd-staging-drm-next commit
6d15a288b18119428b3af5d7a7641745e9f82860 (the latest at the time of testing=
) as
well as mainline 4.16.0. With the RX 560, the overscanning only occurs when=
the
new DC code is used, using the old code (with amdgpu.dc=3D0) results in a p=
erfect
display. This also doesn't affect any other monitor I own using HDMI.=20
Attached further are logs made with amdgpu.dc_log=3D1 and drm.debug=3D0x6 o=
n the
Vega 64, the 560 with amdgpu.dc=3D1, and the 560 with amdgpu.dc=3D0.