Have an OPi 4B with installed Armbian (Armbian_21.05.1_Orangepi4_buster_legacy_4.4.213_xfce_desktop.img from here) which is working perfectly. HUGE thanks for that.
So i wanted to try images with mainline kernel and found that none of XFCE desktop images from the archive can correctly output HDMI signal for my screen, maximum i could achive was compressed and flickering image using method from docs (editing /etc/X11/xorg.conf.d/40-monitor.conf).
by default there are no modes in /sys/class/drm/card0-HDMI-A-1/modes in mainline images and in legacy one there are two: 1280x800p60 and 1280x800p57.
EDID is there in both images.
And if i set resolution via /etc/X11/xorg.conf.d/40-monitor.conf in mainline i can't change it to anything via xrandr because "Configure crtc 0 failed".
on the latest mainline image (Armbian_22.08.10_Orangepi4_jammy_current_5.15.76_xfce_desktop.img) i was able to get normal resolution doing the following :
1. edit /etc/X11/xorg.conf.d/40-monitor.conf from console like below:
Section "Monitor"
Identifier "HDMI-1"
Modeline "1280x800_try4" 75 1280 1290 1300 1500 800 805 810 823 +hsync -vsync
Option "PreferredMode" "1280x800_try4"
EndSection
this gets me a compressed screen after reboot.
2. then in terminal:
xrandr --newmode "1280x800_60.00" 83.46 1280 1344 1480 1680 800 801 804 828 -hsync +vsync
xrandr --addmode DP-1 1280x800_60.00
xrandr --output DP-1 --mode 1280x800_60.00
xrandr --output DP-1 --crtc 1
after that image on HDMI suddenly becomes normal but still no resolution changes can be applied to HDMI
Any chances for easy workaround here?
