[9000h]

Hi,

also my thanks to @wesk05, the CEA 861-F timings did the trick!

Code:

xrandr -display :0 --newmode  "3840x2160_50.00" 594.00 3840 4896 4984 5280 2160 2168 2178 2250 +hsync +vsync
xrandr -display :0 --addmode DP2 3840x2160_50.00
xrandr -display :0 --output DP2 --mode 3840x2160_50.00

with this timings I finally got 2160p50 with the Asrock J4205-itx and a Panasonic CXW754, it seems the Pana is more strict about the timings and I'm very happy that the Magachips MCDP2800 is not the issue.

btw is there any tool to calculate the CEA 861-F modlines like cvt or umc?

@fritsch your xorg.conf is working also fine here

Code:

xrandr -d :0 -q
Screen 0: minimum 8 x 8, current 3840 x 2160, maximum 32767 x 32767
DP1 disconnected (normal left inverted right x axis y axis)
DP2 connected primary 3840x2160+0+0 (normal left inverted right x axis y axis) 1280mm x 720mm
   3840x2160@50p  50.00*+
   3840x2160     30.00 +  25.00    24.00    29.97    23.98  
   4096x2160     24.00    23.98  
   3840x2160@60p  60.00  
   2560x1440     59.95  
   1920x1080@50p  50.00  
   1920x1080@60p  60.00  
   1920x1080     60.00    50.00    59.94    30.00    25.00    24.00    29.97    23.98  
   [email protected]  59.94  
   1920x1080@24p  24.00  
   1920x1080i    60.00    50.00  
   1920x1080@23p  23.98  
   1366x768      59.79  
   1280x720      60.00    50.00    59.94  
   1024x768      60.00  
   720x576       50.00  
   720x480       60.00    59.94  
   640x480       60.00    59.94  
HDMI1 disconnected (normal left inverted right x axis y axis)
VIRTUAL1 disconnected (normal left inverted right x axis y axis)

CU
9000h