xrandr虚拟显示器

• 虚拟一个屏幕

https://dl.2011101.xyz/%E6%95%99%E7%A8%8B/Sunshine%20_%20Moonlight%20%E7%BA%AF%E8%BD%AF%E4%BB%B6%E5%AE%9E%E7%8E%B0%E5%85%A8%E5%B9%B3%E5%8F%B0%E8%AE%BE%E5%A4%87%E4%BD%9C%20Linux%20%E5%89%AF%E5%B1%8F%20-%20Sxrhhh%20-%20%E5%8D%9A%E5%AE%A2%E5%9B%AD%20(2024_7_20%2014_41_55).html
https://github.com/dianariyanto/virtual-display-linux/issues/9#issuecomment-786389065
https://github.com/pavlobu/deskreen/issues/42

export DISPLAY=:0
# 如果是服务器, 没有任何显示器使用 issuecomment-786389065 修改/etc/X11/xorg.conf 当有connected就可以使用, 安装nv显卡驱动之后无法显示界面也可使用

# 创建一个和实体机一样大的虚拟显示器
cvt 1920 1080 30
gtf 1920 1080 60

xrandr --newmode "2880x1800_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync
# selected disconnected Screen, such as HDMI-1
xrandr --addmode HDMI-1 2880x1800_60.00
xrandr --output HDMI-1 --mode "2880x1800_60.00" --right-of eDP-1
xrandr
# see has * is runing.
# ...
# HDMI-1 disconnected 2880x1800+2880+0 (normal left inverted right x axis y axis) 0mm x 0mm
#    2880x1800_60.00  59.96*
# ...

# Off
xrandr --output HDMI-1 --off
# xrandr --delmode HDMI-1 "1920x1080_60.00"


# and use vnc server to use
x11vnc -forever -usepw -display :0

• 显卡测试性能测试

# mesa-utils glx-utils
yum install glx-utils

glxgears

• 显示器输出缩放

xrandr --output HDMI-1 --scale 2.15x2.15
# 亮度
xrandr --output HDMI-1 --brightness 0.6