Unable to change resolution on Vega 10 (Thinkpad T495s, Ryzen 7 PRO 3700U)
Hi, xrandr provides me with following modes:
eDP-1 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 309mm x 173mm
1920x1080 60.00*+ 59.97 59.96 59.93
1680x1050 59.95 60.00 59.88
1400x1050 59.98
1600x900 59.99 59.94 59.95 59.82
1280x1024 60.00 60.02
1440x900 60.00
1400x900 59.96 59.88
1280x960 60.00
1440x810 60.00 59.97
1368x768 59.88 59.85
1280x800 59.99 60.00 59.97 59.81 59.91
1280x720 60.00 60.00 59.99 59.86 59.74
1024x768 60.00 60.04 60.00
960x720 60.00
928x696 60.05
896x672 60.01
1024x576 59.95 59.96 59.90 59.82
960x600 59.93 60.00
960x540 59.96 59.99 59.63 59.82
800x600 60.00 60.00 60.32 56.25
840x525 60.01 59.88
864x486 59.92 59.57
700x525 59.98
800x450 59.95 59.82
640x512 60.02
700x450 59.96 59.88
640x480 60.00 60.00 59.94
720x405 59.51 58.99
684x384 59.88 59.85
640x400 59.88 59.98
640x360 59.86 59.83 59.84 59.32
512x384 60.00
512x288 60.00 59.92
480x270 59.63 59.82
400x300 60.32 56.34
432x243 59.92 59.57
320x240 60.05
360x202 59.51 59.13
320x180 59.84 59.32
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
however most of these modes do not work. Selecting them results in blank screen (monitor backlight works but screen is black). I have shortcut which switches back to native mode which fixes it. It also should not be only hw problem of notebook monitor (like invalid frequency), because sometimes this change forces plasma desktop to crash, which I guess should not happen in case of only monitor problem. But there is no error to be found in Xorg.log, there is only message "Allocate new frame buffer" when resolution is being changed, either to non working or back to native.
This is for modesetting driver, amdgpu driver lists fewer modes, but again only some of them are working.