Broken Monitor

With broken monitor..

Some monitors might end up 'dying' or only working in lower refresh rates, they are blinking when setting to high refresh rate, or not showing any picture at all. Use HDMI, This usual works!

Fixing this might be hard, in windows, go to NVIDIA Control Panel set ColorSpace to YcBcr420. Things should work. Same thing works in Linux. You might wanna use HDMI and DP at the same time to fix the problem.

In Linux, with amdgpu driver,

  cd /usr/src/linux/
  vim drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

Change

  timing_out->pixel_encoding = PIXEL_ENCODING_RGB;

to

  timing_out->pixel_encoding = PIXEL_ENCODING_YCBCR422;

  make oldconfig
  make scripts prepare modules_prepare
  make -j9 -C . M=drivers/gpu/drm

  cp ./drivers/gpu/drm/*ko /lib/modules/kernel-version/kernel/drivers/gpu/drm/
  cp ./drivers/gpu/drm/amd/amdgpu/amdgpu.ko /lib/modules/kernel-version/kernel/drivers/gpu/drm/amd/amdgpu/
  depmod -a
  reboot

That's all folks, have fun with ASUS VG258QR 165hz with YCBCR420 :-)

And btw add something like "video=DP-1:1920x1080@165" to the append line of lilo/grub :-)