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Hello, i'm searching on the web, but cao't found how to specify my screen resolution to 1680x1050.I read the doc https://doc.ubuntu-fr.org/xrandr Code: xrandr Screen 0: minimum 8 x 8, current 1360 x 768, maximum 16384 x 16384 DVI-I-0 discoected (normal left inverted right x axis y axis) DVI-I-1 coected 1360x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm 1024x768 60.00 + 1360x768 59.96* 59.80 1152x864 60.00 800x600 72.19 60.32 56.25 680x384 59.96 59.80 640x480 59.94 512x384 60.00 400x300 72.19 320x240 60.05 HDMI-0 discoected (normal left inverted right x axis y axis) DP-0 discoected (normal left inverted right x axis y axis) DP-1 discoected (normal left inverted right x axis y a...

Hi to all,I installed ubuntu 15.10 as guest O.S. on virutalbox.I have a problem with the screen resolution because I want set a resolution of 1024x768 but the max resolution that ubuntu retu me is 800x600.I tried to increase the max resolution to 1024x768 using the "XRANDR" command, but this command not work properly.If I run the command I get the following error (xrandr: Failed to get size of gamma for output default): Code: user@Ubuntu:~$ xrandr --q xrandr: Failed to get size of gamma for output default Screen 0: minimum 640 x 480, current 800 x 600, maximum 800 x 600 default coected primary 800x600+0+0 0mm x 0mm 800x600 61.00 640x480 60.00 If I run the command for increase the screen reso...