Troubleshooting LattePanda 3 Delta Linux

Can't reduce screen resolution under linux

StanislavRubtsov 2023-01-27 16:38:20 759 Views1 Replies
Hi, I own LattePanda 3 Delta. After intstalling kali linux I have automatically set maximum resolution for my screen 1920x1080, but I can't reduce it's to small to work with. I have other options in gui and xrandr but it reverts same time I switched it. I tried to set GRUB_GFXMODE=1280x720 but it work at grub menu only. when using same screen and kali distro with raspberryPi have no this issue. here is my sets and logs when switching resolution:

# xrandr -q
Screen 0: minimum 320 x 200, current 1920 x 1080, maximum 16384 x 16384
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 532mm x 299mm
1920x1080 60.00*+ 50.00 59.94
1920x1080i 60.00 50.00 59.94
1680x1050 59.88
1280x1024 75.02 60.02
1440x900 59.90
1280x960 60.00
1366x768 59.96
1280x800 59.91
1152x864 75.00
1280x720 60.00 50.00 59.94
1024x768 75.03 70.07 60.00
832x624 74.55
800x600 72.19 75.00 60.32 56.25
720x576 50.00
720x480 60.00 59.94
640x480 75.00 72.81 60.00 59.94
720x400 70.08

# xrandr --verbose --output HDMI-2 --mode 1280x720 --rate 60
crtc 0: disable
screen 0: 1280x720 338x190 mm 95.92dpi
crtc 0: 1280x720 60.00 +0+0 "HDMI-2"

# /var/log/Xorg.0.log
[ 1191.544] (II) modeset(0): Allocate new frame buffer 1280x720 stride
[ 1192.146] (II) modeset(0): EDID vendor "FHD", prod id 4224
[ 1192.146] (II) modeset(0): Using hsync ranges from config file
[ 1192.146] (II) modeset(0): Using vrefresh ranges from config file
[ 1192.146] (II) modeset(0): Printing DDC gathered Modelines:
[ 1192.146] (II) modeset(0): Modeline "1920x1080"x0.0 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync (67.5 kHz eP)
[ 1192.146] (II) modeset(0): Modeline "1366x768"x0.0 85.75 1366 1436 1579 1792 768 771 774 798 +hsync +vsync (47.9 kHz e)
.... and right after it reverts....
[ 1192.186] (II) modeset(0): Allocate new frame buffer 1920x1080 stride
[ 1192.297] (II) modeset(0): EDID vendor "FHD", prod id 4224
[ 1192.298] (II) modeset(0): Using hsync ranges from config file
[ 1192.298] (II) modeset(0): Using vrefresh ranges from config file
[ 1192.298] (II) modeset(0): Printing DDC gathered Modelines:
[ 1192.298] (II) modeset(0): Modeline "1920x1080"x0.0 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync (67.5 kHz eP)
[ 1192.298] (II) modeset(0): Modeline "1366x768"x0.0 85.75 1366 1436 1579 1792 768 771 774 798 +hsync +vsync (47.9 kHz e)

# xrandr --verbose -s 1280x720 --rate 60
SZ: Pixels Physical Refresh
*0 1920 x 1080 ( 532mm x 299mm ) *60 50 30 25
1 1680 x 1050 ( 532mm x 299mm ) 60
2 1280 x 1024 ( 532mm x 299mm ) 75 60
3 1440 x 900 ( 532mm x 299mm ) 60
4 1280 x 960 ( 532mm x 299mm ) 60
5 1366 x 768 ( 532mm x 299mm ) 60
6 1280 x 800 ( 532mm x 299mm ) 60
7 1152 x 864 ( 532mm x 299mm ) 75
8 1280 x 720 ( 532mm x 299mm ) 60 50
9 1024 x 768 ( 532mm x 299mm ) 75 70 60
10 832 x 624 ( 532mm x 299mm ) 75
11 800 x 600 ( 532mm x 299mm ) 72 75 60 56
12 720 x 576 ( 532mm x 299mm ) 50
13 720 x 480 ( 532mm x 299mm ) 60
14 640 x 480 ( 532mm x 299mm ) 75 73 60
15 720 x 400 ( 532mm x 299mm ) 70
Current rotation - normal
Current reflection - none
Rotations possible - normal left inverted right
Reflections possible - X Axis Y Axis
Setting size to 8, rotation to normal
Setting reflection on neither axis
Event received, type = 89
Got a screen change notify event!
window = 1896
root = 1896
size_index = 65535
rotation 1
timestamp = 3221334, config_timestamp = 3221289
Rotation = 1
1920 X 1080 pixels, 508 X 286 mm
Display width 1920, height 1080
Display widthmm 508, heightmm 286
new Subpixel rendering model is unknown

any help please