UbuntuHelp:ExternalMonitor

文章出处:

https://help.ubuntu.com/community/ExternalMonitor

点击翻译:

English

请不要直接编辑翻译本页，本页将定期与来源同步。

Guide on how to deal with a wrongly detected external monitor connected through VGA-cable

1. If you are connecting your external monitor with a VGA-cable, check that it has all 15 pins present in both ends, otherwise automatic detection might/is bound to fail. Most cables, according to my experience, seem to have one pin missing.