Ubuntu very laggy VNC

[GodAtum]

I have a Ubuntu 16.04 desktop with VNC installed. Compared to my Windows 10 it is very laggy. The mouse takes ages to move and the windows slowly open. On Windows there's no such lag.

 

[AmateurExpert]

Presumably you mean you have a VNC server running on your Ubuntu desktop, and when viewing this desktop from a client on another host you get a lot of lag?

If so, is the VNC server machine plugged into a monitor or is it headless? If headless, then you may be running into a known X server bug. There is a workaround for this which works for me: install xserver-xorg-video-dummy-lts-xenial on the VNC server machine and add a dummy display config in your xorg.conf file (there is an example in the answer given at https://askubuntu.com/questions/1022093/teamviewer-slow-on-ubuntu-without-monitor-16-04).

 

[GodAtum]

Presumably you mean you have a VNC server running on your Ubuntu desktop, and when viewing this desktop from a client on another host you get a lot of lag?

If so, is the VNC server machine plugged into a monitor or is it headless? If headless, then you may be running into a known X server bug. There is a workaround for this which works for me: install xserver-xorg-video-dummy-lts-xenial on the VNC server machine and add a dummy display config in your xorg.conf file (there is an example in the answer given at https://askubuntu.com/questions/1022093/teamviewer-slow-on-ubuntu-without-monitor-16-04).

Ah yes, that makes it much better. But now my max resolution is now 1360x768 from 1080!

 

[AmateurExpert]

If you've used the example xorg.conf with the line:
Modes "1024x800"

Try changing the resolution there to something like "1920x1080" and restarting

 

[GodAtum]

yeah i did but makes no difference

 

[GodAtum]

yeah i did but it makes no difference