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Add resolution adjustment within xorg with xrandr (#69)

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* Update User-Guide_Fine-Tuning.md

* Update User-Guide_Fine-Tuning.md
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Werner
2020-04-24 13:22:42 +02:00
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docs/User-Guide_Fine-Tuning.md
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@@ -35,7 +35,34 @@
# disp.screen0_output_mode=1280x720p60
mkimage -C none -A arm -T script -d /boot/boot.cmd /boot/boot.scr
### Screen resolution within Xorg <sub>[Thx @maxlinux2000](https://forum.armbian.com/topic/10403-add-undetected-hdmi-resolution-to-x11xorg/)</sub>
Find matching HDMI output:
xrandr --listmonitors
Calculate VESA CVT mode lines (example for 1440x900)
cvt 1440 900
Sample output:
1440x900 59.89 Hz (CVT 1.30MA) hsync: 55.93 kHz; pclk: 106.50 MHz
Modeline "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync )
Create new mode (example):
xrandr --newmode "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync
Add resolution (example):
xrandr --addmode HDMI-1 1440x900_60.00
Set current resolution (example):
xrandr --output HDMI-1 --mode 1440x900_60.00
If it works as expected add it to Xorg by editing
/etc/X11/xorg.conf.d/40-monitor.conf
add (example)
Section "Monitor"
Identifier "HDMI-1"
Modeline "1440x900_60.00" 106.50 1440 1528 1672 1904 900 903 909 934 -hsync +vsync
Option "PreferredMode" "1440x900"
EndSection
Restart Xorg or reboot
### How to alter CPU frequency?