I'm having the same random blanking problem on a HD3450 at 19200x1200 driven through the HDMI output.
xserver-xorg-video-radeon: Installed: 1:6.9.0.91-1ubuntu4
I'm having the same random blanking problem on a HD3450 at 19200x1200 driven through the HDMI output.
xserver- xorg-video- radeon:
Installed: 1:6.9.0.91-1ubuntu4