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Unknown Display in Ubuntu 16.04. Set Resolution using xrandr command but after restart display resolution in reset.

sudo cvt 1368 768 60

after this output will here

#1368x768 59.88 Hz (CVT) hsync: 47.79 kHz; pclk: 85.25 MHz Modeline "1368x768_60.00" 85.25 1368 1440 1576 1784 768 771 781 798 -hsync +vsync

then

sudo xrandr --newmode "1368x768_60.00" 85.25 1368 1440 1576 1784 768 771 781 798 -hsync +vsync

<p>sudo xrandr --addmode VGA-1 1368x768_60.00</p>

display will change that time but after restart/re-login the display is changed to default 1024x768(4:3) and show the error like

could not apply the stored configuration for monitors

but i want 1368x768(16:9).

I'm using dell S2216H display and Intel Inbuilt HD Graphics.

Ravi S.
  • 31
  • i need this configuration permanent. – Ravi S. May 18 '17 at 04:38
  • First of all you don't have to use sudo for working with xrandr. Secondly, please paste the output of xrandr without arguments in your question, so we can see what the system reports. –  May 18 '17 at 14:16
  • @WillemK There is no output after xrandr command. After these command execution screen resolution is changed but after restart resolution will reset. – Ravi S. May 19 '17 at 12:19
  • very strange. Xrandr should report something. if it returns nothing I think you should try another display driver. –  May 19 '17 at 13:45

2 Answers2

2

You can reconfigure xOrg. I did this by creating a file in my /usr/share/X11/xorg.conf.d Directory.

I made it using vim:

sudo vim /usr/share/X11/xorg.conf.d/5-monitor.conf

Here is an example of my file.

Section "Monitor"
   Identifier "Monitor0"
   Modeline "1920x1080_60.00" 173.00 1920 2048 2248 2576 1080 1083 1088 1120 -hsync +vsync
   Modeline "3840x2160_30.0" 297.00 3840 4016 4104 4400 2160 2168 2178 2250 +hsync +vsync
   Modeline "4096x2160_24.0" 297.00 4096 5116 5204 5500 2160 2168 2178 2250 +hsync +vsync
EndSection
Section "Device"
   Identifier "Device0"
   Driver "intel"
EndSection
Section "Screen"
   Identifier "Screen0"
   Device "Device0"
   Monitor "Monitor0"
   DefaultDepth 24
   SubSection "Display"
      Depth 24
      Modes "3840x2160" "1920x1080"
   EndSubSection
EndSection

For directions on how to do this you can follow this tutorial: https://wiki.gentoo.org/wiki/Xorg/Multiple_monitors

I ran into this issue a little while back.

Jermayne Williams
  • 215
0

This is how the output of xrandr could look like (I have shortened the list):

willem@TP420XU1604:~$ xrandr 
Screen 0: minimum 320 x 200, current 1600 x 900, maximum 8192 x 8192
LVDS-1 connected 1600x900+0+0 (normal left inverted right x axis y axis) 309mm x 174mm
   1600x900      60.01*+  40.00  
   1440x900      59.89  
   1360x768      59.80    59.96  
   .
   .
   400x300       60.32    56.34  
   320x240       60.05  
VGA-1 disconnected (normal left inverted right x axis y axis)
HDMI-1 disconnected (normal left inverted right x axis y axis)
DP-1 disconnected (normal left inverted right x axis y axis)
HDMI-2 disconnected (normal left inverted right x axis y axis)
HDMI-3 disconnected (normal left inverted right x axis y axis)
DP-2 disconnected (normal left inverted right x axis y axis)
DP-3 disconnected (normal left inverted right x axis y axis)
willem@TP420XU1604:~$

As I said in my comment, if you have no output at all, I think you have an issue with your graphics driver. Use lshw -c video to get info from the system. Please use the following post to troubleshoot: https://askubuntu.com/questions/23238/how-can-i-find-what-video-driver-is-in-use-on-my-system