Zero's Uncle: xrandr - 雙螢幕解析度切換

2021-06-10

xrandr - 雙螢幕解析度切換

2021-06-10

雙螢幕 : 開機前先接好螢幕，才會自動抓到

查詢硬體

xrandr

DVI-I-0 disconnected (normal left inverted right x axis y axis)
VGA-0 connected primary 1920x1080+0+0 (normal left inverted right x axis y axis) 521mm x 293mm
   1360x768      60.02 +
   1920x1080     59.93*
DVI-I-1 disconnected (normal left inverted right x axis y axis)
HDMI-0 disconnected (normal left inverted right x axis y axis)
HDMI-1-1 disconnected (normal left inverted right x axis y axis)
HDMI-1-2 disconnected (normal left inverted right x axis y axis)
DP-1-1 connected 1280x1024+0+0 (normal left inverted right x axis y axis) 376mm x 301mm
   1280x1024     60.02*+
   1024x768      60.00
HDMI-1-3 disconnected (normal left inverted right x axis y axis)
  1280x1024 (0x282) 108.000MHz +HSync +VSync
        h: width  1280 start 1328 end 1440 total 1688 skew    0 clock  63.98KHz
        v: height 1024 start 1025 end 1028 total 1066           clock  60.02Hz
  1024x768 (0x285) 65.000MHz -HSync -VSync
        h: width  1024 start 1048 end 1184 total 1344 skew    0 clock  48.36KHz
        v: height  768 start  771 end  777 total  806           clock  60.00Hz

調解析度

xrandr --output VGA-0 --mode 1920x1080 --output DP-1-1 --mode 1280x1024

DP-1-1 在 VGA-0 左側

xrandr --output DP-1-1 --left-of  VGA-0

DP-1-1 在 VGA-0 右側

xrandr --output DP-1-1 --right-of VGA-0

關 HDMI-1-1 ，開 VGA-0

xrandr --output DP-1-1 --off
xrandr --output DP-1-1 --off --output VGA-0 --mode 1920x1080

DP-1-1 關 | 開

xrandr --output DP-1-1 --off
xrandr --output DP-1-1 --auto  --output VGA-0 --mode 1920x1080
xrandr --output DP-1-1 --right-of VGA-0

硬體查詢 ( Hardware query )
- sudo inxi -SMCGx
- sudo lshw -c video
- grep . /sys/class/drm/card0-*/{status,enabled,dpms}
- /usr/bin/lspci -nn
- ls /sys/class/drm
- /usr/bin/lsusb
- sudo /usr/sbin/dmidecode
- sudo vim /var/log/kern.log

參考：

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