无显示器linux设置默认分辨率
介绍
使用 teamview 远程连接无显示器的主机时，默认分辨率会被设置为 640x480，显示的内容有限，操作非常不便。
xrandr命令
# 查看当前分辨率
xrandr
# 设置分辨率（进对有显示器生效）
xrandr -s 1920x1080
xrandr --output VGA-1 --mode 1920x1080安装虚拟显示器
# 安装xserver-xorg-video-dummy
sudo apt install xserver-xorg-video-dummy配置xorg.conf
# 进入xorg配置目录
sudo cd /etx/X11
# 备份原始配置文件
sudo cp xorg.conf xorg.conf.bak
# 编辑xorg.conf文件
sudo gedit xorg.conf粘贴以下内容到 xorg.conf 文件中： ::: details
# This xorg configuration file will start a dummy X11 server.
# move it to /etc/X11/xorg.conf
# don't forget apt install xserver-xorg-video-dummy;
# based on https://xpra.org/Xdummy.html
Section "ServerFlags"
Option "DontVTSwitch" "true"
Option "AllowMouseOpenFail" "true"
Option "PciForceNone" "true"
Option "AutoEnableDevices" "false"
Option "AutoAddDevices" "false"
EndSection
Section "InputDevice"
Identifier "dummy_mouse"
Option "CorePointer" "true"
Driver "void"
EndSection
Section "InputDevice"
Identifier "dummy_keyboard"
Option "CoreKeyboard" "true"
Driver "void"
EndSection
Section "Device"
Identifier "dummy_videocard"
Driver "dummy"
Option "ConstantDPI" "true"
#VideoRam 4096000
#VideoRam 256000
VideoRam 192000
EndSection
Section "Monitor"
Identifier "dummy_monitor"
HorizSync 5.0 - 1000.0
VertRefresh 5.0 - 200.0
#To add your own modes here, use a modeline calculator, like:
#http://xtiming.sourceforge.net/cgi-bin/xtiming.pl
#or using the "gtf" command line tool (http://gtf.sourceforge.net/)
#This can be used to get a specific DPI, but only for the default resolution:
#DisplaySize 508 317
#NOTE: the highest modes will not work without increasing the VideoRam
# for the dummy video card.
Modeline "32768x32768" 15226.50 32768 35800 39488 46208 32768 32771 32781 32953
Modeline "32768x16384" 7516.25 32768 35544 39192 45616 16384 16387 16397 16478
Modeline "16384x8192" 2101.93 16384 16416 24400 24432 8192 8390 8403 8602
Modeline "8192x4096" 424.46 8192 8224 9832 9864 4096 4195 4202 4301
Modeline "6400x2160" 160.51 6400 6432 7040 7072 2160 2212 2216 2269
Modeline "5680x1440" 142.66 5680 5712 6248 6280 1440 1474 1478 1513
Modeline "5496x1200" 199.13 5496 5528 6280 6312 1200 1228 1233 1261
Modeline "5280x1080" 169.96 5280 5312 5952 5984 1080 1105 1110 1135
Modeline "5280x1200" 191.40 5280 5312 6032 6064 1200 1228 1233 1261
Modeline "5120x3200" 199.75 5120 5152 5904 5936 3200 3277 3283 3361
Modeline "4800x1200" 64.42 4800 4832 5072 5104 1200 1229 1231 1261
Modeline "4720x3840" 227.86 4720 4752 5616 5648 3840 3933 3940 4033
Modeline "3840x2880" 133.43 3840 3872 4376 4408 2880 2950 2955 3025
Modeline "3840x2560" 116.93 3840 3872 4312 4344 2560 2622 2627 2689
Modeline "3840x2048" 91.45 3840 3872 4216 4248 2048 2097 2101 2151
Modeline "3840x1200" 108.89 3840 3872 4280 4312 1200 1228 1232 1261
Modeline "3840x1080" 100.38 3840 3848 4216 4592 1080 1081 1084 1093
Modeline "3864x1050" 338.00 3864 4112 4520 5176 1050 1053 1063 1089
Modeline "3600x1200" 106.06 3600 3632 3984 4368 1200 1201 1204 1214
Modeline "3600x1080" 91.02 3600 3632 3976 4008 1080 1105 1109 1135
Modeline "3520x1196" 99.53 3520 3552 3928 3960 1196 1224 1228 1256
Modeline "3360x1050" 293.75 3360 3576 3928 4496 1050 1053 1063 1089
Modeline "3288x1080" 39.76 3288 3320 3464 3496 1080 1106 1108 1135
Modeline "3120x1050" 272.75 3120 3320 3648 4176 1050 1053 1063 1089
Modeline "2728x1680" 148.02 2728 2760 3320 3352 1680 1719 1726 1765
Modeline "2048x2048" 49.47 2048 2080 2264 2296 2048 2097 2101 2151
Modeline "2048x1536" 80.06 2048 2104 2312 2576 1536 1537 1540 1554
Modeline "2048x1152" 197.97 2048 2184 2408 2768 1152 1153 1156 1192
Modeline "2560x1600" 47.12 2560 2592 2768 2800 1600 1639 1642 1681
Modeline "2560x1440" 42.12 2560 2592 2752 2784 1440 1475 1478 1513
Modeline "1920x1440" 69.47 1920 1960 2152 2384 1440 1441 1444 1457
Modeline "1920x1200" 26.28 1920 1952 2048 2080 1200 1229 1231 1261
Modeline "1920x1080" 23.53 1920 1952 2040 2072 1080 1106 1108 1135
Modeline "1680x1050" 20.08 1680 1712 1784 1816 1050 1075 1077 1103
Modeline "1600x1200" 22.04 1600 1632 1712 1744 1200 1229 1231 1261
Modeline "1600x900" 33.92 1600 1632 1760 1792 900 921 924 946
Modeline "1440x900" 30.66 1440 1472 1584 1616 900 921 924 946
ModeLine "1366x768" 72.00 1366 1414 1446 1494 768 771 777 803
Modeline "1280x1024" 31.50 1280 1312 1424 1456 1024 1048 1052 1076
Modeline "1280x800" 24.15 1280 1312 1400 1432 800 819 822 841
Modeline "1280x768" 23.11 1280 1312 1392 1424 768 786 789 807
Modeline "1360x768" 24.49 1360 1392 1480 1512 768 786 789 807
Modeline "1024x768" 18.71 1024 1056 1120 1152 768 786 789 807
Modeline "768x1024" 19.50 768 800 872 904 1024 1048 1052 1076
#common resolutions for android devices (both orientations):
Modeline "800x1280" 25.89 800 832 928 960 1280 1310 1315 1345
Modeline "1280x800" 24.15 1280 1312 1400 1432 800 819 822 841
Modeline "720x1280" 30.22 720 752 864 896 1280 1309 1315 1345
Modeline "1280x720" 27.41 1280 1312 1416 1448 720 737 740 757
Modeline "768x1024" 24.93 768 800 888 920 1024 1047 1052 1076
Modeline "1024x768" 23.77 1024 1056 1144 1176 768 785 789 807
Modeline "600x1024" 19.90 600 632 704 736 1024 1047 1052 1076
Modeline "1024x600" 18.26 1024 1056 1120 1152 600 614 617 631
Modeline "536x960" 16.74 536 568 624 656 960 982 986 1009
Modeline "960x536" 15.23 960 992 1048 1080 536 548 551 563
Modeline "600x800" 15.17 600 632 688 720 800 818 822 841
Modeline "800x600" 14.50 800 832 880 912 600 614 617 631
Modeline "480x854" 13.34 480 512 560 592 854 873 877 897
Modeline "848x480" 12.09 848 880 920 952 480 491 493 505
Modeline "480x800" 12.43 480 512 552 584 800 818 822 841
Modeline "800x480" 11.46 800 832 872 904 480 491 493 505
#resolutions for android devices (both orientations)
#minus the status bar
#38px status bar (and width rounded up)
Modeline "800x1242" 25.03 800 832 920 952 1242 1271 1275 1305
Modeline "1280x762" 22.93 1280 1312 1392 1424 762 780 783 801
Modeline "720x1242" 29.20 720 752 856 888 1242 1271 1276 1305
Modeline "1280x682" 25.85 1280 1312 1408 1440 682 698 701 717
Modeline "768x986" 23.90 768 800 888 920 986 1009 1013 1036
Modeline "1024x730" 22.50 1024 1056 1136 1168 730 747 750 767
Modeline "600x986" 19.07 600 632 704 736 986 1009 1013 1036
Modeline "1024x562" 17.03 1024 1056 1120 1152 562 575 578 591
Modeline "536x922" 16.01 536 568 624 656 922 943 947 969
Modeline "960x498" 14.09 960 992 1040 1072 498 509 511 523
Modeline "600x762" 14.39 600 632 680 712 762 779 783 801
Modeline "800x562" 13.52 800 832 880 912 562 575 578 591
Modeline "480x810" 12.59 480 512 552 584 810 828 832 851
Modeline "848x442" 11.09 848 880 920 952 442 452 454 465
Modeline "480x762" 11.79 480 512 552 584 762 779 783 801
EndSection
Section "Screen"
Identifier "dummy_screen"
Device "dummy_videocard"
Monitor "dummy_monitor"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
#Modes "32768x32768" "32768x16384" "16384x8192" "8192x4096" "5120x3200" "3840x2880" "3840x2560" "3840x2048" "2048x2048" "2560x1600" "1920x1440" "1920x1200" "1920x1080" "1600x1200" "1680x1050" "1600x900" "1400x1050" "1440x900" "1280x1024" "1366x768" "1280x800" "1024x768" "1024x600" "800x600" "320x200"
Modes "5120x3200" "3840x2880" "3840x2560" "3840x2048" "2048x2048" "2560x1600" "1920x1440" "1920x1200" "1920x1080" "1600x1200" "1680x1050" "1600x900" "1400x1050" "1440x900" "1280x1024" "1366x768" "1280x800" "1024x768" "1024x600" "800x600" "320x200"
#Virtual 32000 32000
#Virtual 16384 8192
#Virtual 8192 4096
#Virtual 5120 3200
Virtual 1024 768
EndSubSection
EndSection
Section "ServerLayout"
Identifier "dummy_layout"
Screen "dummy_screen"
InputDevice "dummy_mouse"
InputDevice "dummy_keyboard"
EndSection:::
保存并重启
::: warning 注意 Identifier ：虚拟显示器的名称，你可以根据需要自定义。
Driver ：虚拟显示器的驱动程序，这里应该选择dummy。
Modeline ：虚拟显示器的显示模式，你可以根据需要选择适当的模式。
Viewport ：虚拟显示器的显示区域，你可以根据需要设置。
我们只需要将 Virtual 1024 768 改成适合你的分辨率，比如 Virtual 2560 1440,如果首次进入没有识别分辨率，可以进显示设置选择合适分辨率 :::
使用nvidia-xconfig生成xorg配置
# 方法一:
# 使用nvidia-xconfig生成xorg配置
sudo nvidia-xconfig
# 编辑xorg.conf文件，将 Virtual 2560 1440 加入到 Section "Screen" 中
# 保存，重启
# 方法二:
# 使用nvidia-xconfig命令加参数生成xorg配置
sudo nvidia-xconfig --use-display-device=all --virtual=2560x1440::: warning 注意 使用 nvidia-xconfig 配置虽然简单，但是会导致显示无法显示底部菜单（本人使用 deepin23 测试，其他系统可能也会出现类似问题） :::
参考
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