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Increase virtual screen size past 4096 x 4096 on Ubuntu 14.04 LTS

Virtual screen larger than 4096x4096 using xrandrUbuntu 14.04 — 2 Monitors only acting as 1 monitorHow to get Lilliput USB monitor working?How can I set external monitor as default?NVidia dual monitor set-up 11.04External monitor does not correctly display on GMA500Dual displays not working, white backgorundAdd file to set screen size on Xorglow display resolutionXorg increase virtual screen size past 8192 x 8192How to render xorg on intel graphics and use cuda on nvidia gpu?Forcing a Display Size on Ubuntu 16.04

2

I have two 27" monitors with a 2560 x 1920 resolution each. When I try to extend my desktop across them both I get the below error:

So, if I need to increase the maximum virtual screen size? To include a resolution of 5120 x 1920.

I've been trying to do this for about 12 hours now....

I have tried using xrandr arandr and a bunch of other tools recommend on this site and other forums.

I have added a xorg.conf file to /etc/X11 (which didn't exist already, and I generated) which now looks like this:

Note: This is just a snippet from the file (I can post it if needed).

Section "Screen"
 SubSection "Display"
 Virtual 5120 4096
 EndSubSection
EndSection

I also tried a bunch of other similar answers, and in the process messed up the xorg server and wasn't able to boot at all until re installing it.

I know xserver changed a bit from 12 to 14, and now uses a bunch of files in /usr/share/xorg.conf.d, which I have also played around with. My understanding is putting a xorg.conf file in the /etc/X11 folder would overrule that anyway (but really, I've been trying anything).

So far nothing has worked.

Some things have had an effect, like me not being able to boot up at all, or get past the logo, which have been solved by root terminalling in safe mode to undo changes or reinstall xserver.

Any ideas would be appreciated.

xorg multiple-monitors display resolution

share|improve this question

asked Oct 12 '14 at 14:15

S..S..

2351311

bumped to the homepage by Community♦ 11 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Take a look at thinkwiki.org/wiki/Xorg_RandR_1.2#the_Virtual_screen for an explanation of why 4096x4096 is the limit.
  
  – James
  Oct 12 '14 at 14:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks @James I hadn't seen that. It doesn't really explain why 4096 4096 is the limit, just that it is, and the higher the number the more resources are consumed. tl;dr: Is there any way I can increase to 5120 1920? I really don't want to go back to windows..
  
  – S..
  Oct 12 '14 at 15:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also take a look at askubuntu.com/questions/347292/… for a possible workaround.
  
  – James
  Oct 13 '14 at 0:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  'Sadly'I went back to windows for this machine.. It simply works.
  
  – S..
  Nov 27 '14 at 11:44
  

  
  
  
  

add a comment | 

2

I have two 27" monitors with a 2560 x 1920 resolution each. When I try to extend my desktop across them both I get the below error:

So, if I need to increase the maximum virtual screen size? To include a resolution of 5120 x 1920.

I've been trying to do this for about 12 hours now....

I have tried using xrandr arandr and a bunch of other tools recommend on this site and other forums.

I have added a xorg.conf file to /etc/X11 (which didn't exist already, and I generated) which now looks like this:

Note: This is just a snippet from the file (I can post it if needed).

Section "Screen"
 SubSection "Display"
 Virtual 5120 4096
 EndSubSection
EndSection

I also tried a bunch of other similar answers, and in the process messed up the xorg server and wasn't able to boot at all until re installing it.

I know xserver changed a bit from 12 to 14, and now uses a bunch of files in /usr/share/xorg.conf.d, which I have also played around with. My understanding is putting a xorg.conf file in the /etc/X11 folder would overrule that anyway (but really, I've been trying anything).

So far nothing has worked.

Some things have had an effect, like me not being able to boot up at all, or get past the logo, which have been solved by root terminalling in safe mode to undo changes or reinstall xserver.

Any ideas would be appreciated.

xorg multiple-monitors display resolution

share|improve this question

asked Oct 12 '14 at 14:15

S..S..

2351311

bumped to the homepage by Community♦ 11 mins ago

This question has answers that may be good or bad; the system has marked it active so that they can be reviewed.

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Take a look at thinkwiki.org/wiki/Xorg_RandR_1.2#the_Virtual_screen for an explanation of why 4096x4096 is the limit.
  
  – James
  Oct 12 '14 at 14:21
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Thanks @James I hadn't seen that. It doesn't really explain why 4096 4096 is the limit, just that it is, and the higher the number the more resources are consumed. tl;dr: Is there any way I can increase to 5120 1920? I really don't want to go back to windows..
  
  – S..
  Oct 12 '14 at 15:46
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  Also take a look at askubuntu.com/questions/347292/… for a possible workaround.
  
  – James
  Oct 13 '14 at 0:28
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  'Sadly'I went back to windows for this machine.. It simply works.
  
  – S..
  Nov 27 '14 at 11:44
  

  
  
  
  

add a comment | 

I have two 27" monitors with a 2560 x 1920 resolution each. When I try to extend my desktop across them both I get the below error:

So, if I need to increase the maximum virtual screen size? To include a resolution of 5120 x 1920.

I've been trying to do this for about 12 hours now....

I have tried using xrandr arandr and a bunch of other tools recommend on this site and other forums.

I have added a xorg.conf file to /etc/X11 (which didn't exist already, and I generated) which now looks like this:

Note: This is just a snippet from the file (I can post it if needed).

Section "Screen"
 SubSection "Display"
 Virtual 5120 4096
 EndSubSection
EndSection

I also tried a bunch of other similar answers, and in the process messed up the xorg server and wasn't able to boot at all until re installing it.

I know xserver changed a bit from 12 to 14, and now uses a bunch of files in /usr/share/xorg.conf.d, which I have also played around with. My understanding is putting a xorg.conf file in the /etc/X11 folder would overrule that anyway (but really, I've been trying anything).

So far nothing has worked.

Some things have had an effect, like me not being able to boot up at all, or get past the logo, which have been solved by root terminalling in safe mode to undo changes or reinstall xserver.

Any ideas would be appreciated.

xorg multiple-monitors display resolution

share|improve this question

asked Oct 12 '14 at 14:15

S..S..

2351311

Section "Screen"
 SubSection "Display"
 Virtual 5120 4096
 EndSubSection
EndSection

share|improve this question

asked Oct 12 '14 at 14:15

S..S..

2351311

share|improve this question

asked Oct 12 '14 at 14:15

S..S..

2351311

asked Oct 12 '14 at 14:15

S..S..

2351311

asked Oct 12 '14 at 14:15

S..S..

2351311

1 Answer
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xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 5120x1920 --panning 5120x1920

where --rate xx and mode yyyyXyyy equal a valid mode for your monitor and the -fb and panning switches specify the desktop size. You'll have to adjust these values to your hardware. I don't have 2 monitors to test this so in your case I think you'd leave off the --panning switch and adjust your situation according to information here. This does result in a desktop of the desired size however and I can pan around it.

I returned my desktop to normal (for me) with xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 1440x900

Tested under Lubuntu 14.04.4 64-bit

share|improve this answer

edited Apr 13 '17 at 12:25

Community♦

1

answered Feb 26 '16 at 17:04

Elder GeekElder Geek

27.4k955130

add a comment | 

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0

xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 5120x1920 --panning 5120x1920

where --rate xx and mode yyyyXyyy equal a valid mode for your monitor and the -fb and panning switches specify the desktop size. You'll have to adjust these values to your hardware. I don't have 2 monitors to test this so in your case I think you'd leave off the --panning switch and adjust your situation according to information here. This does result in a desktop of the desired size however and I can pan around it.

I returned my desktop to normal (for me) with xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 1440x900

Tested under Lubuntu 14.04.4 64-bit

share|improve this answer

edited Apr 13 '17 at 12:25

Community♦

1

answered Feb 26 '16 at 17:04

Elder GeekElder Geek

27.4k955130

add a comment | 

0

xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 5120x1920 --panning 5120x1920

where --rate xx and mode yyyyXyyy equal a valid mode for your monitor and the -fb and panning switches specify the desktop size. You'll have to adjust these values to your hardware. I don't have 2 monitors to test this so in your case I think you'd leave off the --panning switch and adjust your situation according to information here. This does result in a desktop of the desired size however and I can pan around it.

I returned my desktop to normal (for me) with xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 1440x900

Tested under Lubuntu 14.04.4 64-bit

share|improve this answer

edited Apr 13 '17 at 12:25

Community♦

1

answered Feb 26 '16 at 17:04

Elder GeekElder Geek

27.4k955130

add a comment | 

xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 5120x1920 --panning 5120x1920

where --rate xx and mode yyyyXyyy equal a valid mode for your monitor and the -fb and panning switches specify the desktop size. You'll have to adjust these values to your hardware. I don't have 2 monitors to test this so in your case I think you'd leave off the --panning switch and adjust your situation according to information here. This does result in a desktop of the desired size however and I can pan around it.

I returned my desktop to normal (for me) with xrandr --output VGA1 --rate 60 --mode 1440x900 --fb 1440x900

Tested under Lubuntu 14.04.4 64-bit

share|improve this answer

edited Apr 13 '17 at 12:25

Community♦

1

answered Feb 26 '16 at 17:04

Elder GeekElder Geek

27.4k955130

share|improve this answer

edited Apr 13 '17 at 12:25

Community♦

1

answered Feb 26 '16 at 17:04

Elder GeekElder Geek

27.4k955130

edited Apr 13 '17 at 12:25

Community♦

1

edited Apr 13 '17 at 12:25

Community♦

1

answered Feb 26 '16 at 17:04

Elder GeekElder Geek

27.4k955130

answered Feb 26 '16 at 17:04

Elder GeekElder Geek

27.4k955130