I'm working with a display and getting the following results, all using Ubuntu 22.04 (I've also tried all in Manjaro with same results):
- AMD graphics card system (amdgpu driver) display functions normally
- Intel integrated graphics computer (i915 driver) gets no display
- Raspberry Pi (?? driver) gets no display
For the AMD system (working), I can run xrandr --verbose and get the modeline:
Modeline "2880x1920"x0.0 360.23 2880 2928 2960 3040 1920 1925 1930 1975 +hsync -vsync (118.5 kHz eP)
Running xrandr on the Intel system i get:
HDMI-1 connected (normal left inverted right x axis y axis)
1280x720 60.00 50.00
720x480 59.94
Not seeing the correct output resolution, I follow the advice of other posts and try to add the modeline manually using:
$ xrandr --newmode "2880x1920" 360.23 2880 2928 2960 3040 1920 1925 1930 1976 +hsync -vsync
$ xrandr --addmode HDMI-1 2880x1920
$ xrandr --output HDMI-1 --mode 2880x1920 --verbose
Results:
screen 0: 2880x1920 760x506 mm 96.25dpi
crtc 0: 2880x1920 60.00 +0+0 "HDMI-1"
xrandr: Configure crtc 0 failed
crtc 0: disable
screen 0: revert
crtc 0: revert
I checked the log with cat ~/.local/share/xorg/Xorg.0.log
[ 717.472] (II) modeset(0): Allocate new frame buffer 2880x1920 stride
[ 717.588] (EE) modeset(0): failed to set mode: No such file or directory
[ 717.608] (II) modeset(0): Allocate new frame buffer 1280x720 stride
[ 717.759] (II) modeset(0): EDID vendor "LGD", prod id 1713
[ 717.759] (II) modeset(0): Using hsync ranges from config file
[ 717.759] (II) modeset(0): Using vrefresh ranges from config file
[ 717.759] (II) modeset(0): Printing DDC gathered Modelines:
[ 717.759] (II) modeset(0): Modeline "2880x1920"x0.0 360.23 2880 2928 2960 3040 1920 1925 1930 1975 +hsync -vsync (118.5 kHz eP)
[ 717.759] (II) modeset(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz e)
On the Intel computer, the second line reads as reported in the log, for RPi, it says
2302.315] (EE) modeset(0): failed to set mode: Invalid argument
Otherwise the results are the same.
Looking at this log, even without adding the xrandr --newmode, teh display is self reporting the correct resolution and timings of 2880x1920. However, for some reason, even though it is self reported and the other mode shows up, xrandr does not report this mode as being available until I add it manually. And after manually adding, I cannot use this mode and modeset claims it is invalid, even though it works on another system.
Is this a bug in modesetting? can I force a different driver to function?
