xrandr add screen resolution

[max_power]

when i go System -> Preferences -> Display

I'm only offered :

1360x768 (16:9)
1152x864 (4:3)

How do i add more screen resolutions?

I tried adding more to /etc/X11/xorg.conf but its not showing up in the options box.

Thanks

[calmario]

Hey man. This will help:

https://wiki.ubuntu.com/X/Config/Resolution

[max_power]

Here are the steps

1. Use xrandr to make sure that the new mode can fit within the maximum framebuffer size

   xrandr | grep maximum

2. Use gtf to create a mode line

   gtf 1440 900 59.9

3. Add new mode using xrandr

   xrandr --newmode "1440x900_59.90"  106.29  1440 1520 1672 1904  900 901 904 932  -HSync +Vsync

4. Add this newly added mode to the desired output (VGA/LVDS etc)

   xrandr --addmode VGA 1440x900_59.90

5. Choose the new mode

   xrandr --output VGA --mode 1440x900_59.90

TO MAKE THE CHANGES PERSISTENT

sudo gedit /etc/X11/xorg.conf

Find this: (yours might look different than from below)
Section "Screen"
Identifier "Primary Screen"
Device "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
EndSection

and add this to it

DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "640x480"
EndSubSection

so it should all look similar to this:

Section "Screen"
Identifier "Primary Screen"
Device "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "640x480"
EndSubSection
EndSection


MAKE SURE YOU ADD YOUR NEW RESOLUTION TO THE MODES LINE
Modes "1280x1024" "1024x768" "640x480"


Thanks to:
https://wiki.ubuntu.com/X/Config/Res...%20resolutions

http://www.arunviswanathan.com/node/53

[unutbu]

Thank you for the nice write-up. =D>

[nacho_dh]

In case the frame buffer size is a limitation for the resolution you want to add (it happened to me), just modify/create the "Virtual" parameter in the "Display" subsection of your xorg.conf. Here's how mine looks after configuring the frame buffer size to use my 22' widescreen (resol: 1680x1050)...

Section "Screen"
	Identifier	"Default Screen"
	Monitor		"Configured Monitor"
	Device		"Configured Video Device"
	SubSection "Display"
		Virtual	2960 1050
		Depth 24
		Modes "1680x1050" "1280x800"
	EndSubSection
EndSection

[Alhenry]

I am extremely confused right now. I want my screen resolution
To be 1280x1024 on 60.00mhz and I have an hp vs17e screen
Any help would be appreciated

[max_power]

I am extremely confused right now. I want my screen resolution
To be 1280x1024 on 60.00mhz and I have an hp vs17e screen
Any help would be appreciated

This is an old thread and the xrandr info might be out dated. I would suggest you start a new thread and mark it as a karmic question.

[Cloink]

I would just like to add that these instructions worked for me with U10.10, after many attempts reading other posts.

DO NOT, if using an NVidia 8400 GS graphics card, install the nvidia driver.

I'm a little confused because my xorg.conf file does not exist. It did before I uninstalled the nvid driver, I need to see what happens when I reboot...

-----------
Rebooted
-----------

I found a backup, xorg.conf.backup (in /etc/X11). I'm guessing here but I think multiple installs/uninstalls of the nvidia driver must have lost the original xorg.conf that the ubuntu install would have created. Anyway, using the backup as a model, I tried my best to change it to match what max_power originally suggested. It hung at the . . u b u n t u . . splash screen so I obviously got that wrong. I've now removed the xorg.conf file (using recovery mode), allowing it to boot up without it, and have added the xrandr commands to a startup.sh shellscript which I already had anyway. This reports some errors/warnings but I get 1680x1050 so I'm happy for now.

----------
Update
Don't miss my comments re D-SUB cable that have tripped over onto page 2 of this thread...
http://ubuntuforums.org/showthread.php?t=1112186&page=2
----------

But.

Does anyone know how to generate the xorg.conf file, as per the ubuntu install?

Thanks,
Cloink.

[Cloink]

Bump.

Does anyone know how to generate the xorg.conf file, as per the ubuntu install?

Mine has gone missing, probably owing to hoping an install of the nvidia driver would give me a native screen resolution option, which of course it didn't.

[fnaaijkens]

Here are the steps

1. Use xrandr to make sure that the new mode can fit within the maximum framebuffer size

   xrandr | grep maximum

2. Use gtf to create a mode line

   gtf 1440 900 59.9

3. Add new mode using xrandr

   xrandr --newmode "1440x900_59.90"  106.29  1440 1520 1672 1904  900 901 904 932  -HSync +Vsync

4. Add this newly added mode to the desired output (VGA/LVDS etc)

   xrandr --addmode VGA 1440x900_59.90

5. Choose the new mode

   xrandr --output VGA --mode 1440x900_59.90

TO MAKE THE CHANGES PERSISTENT

sudo gedit /etc/X11/xorg.conf

Find this: (yours might look different than from below)
Section "Screen"
Identifier "Primary Screen"
Device "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
EndSection

and add this to it

DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "640x480"
EndSubSection

so it should all look similar to this:

Section "Screen"
Identifier "Primary Screen"
Device "ATI Technologies, Inc. M22 [Radeon Mobility M300]"
DefaultDepth 24
SubSection "Display"
Depth 24
Modes "1280x1024" "1024x768" "640x480"
EndSubSection
EndSection


MAKE SURE YOU ADD YOUR NEW RESOLUTION TO THE MODES LINE
Modes "1280x1024" "1024x768" "640x480"


Thanks to:
https://wiki.ubuntu.com/X/Config/Res...%20resolutions

http://www.arunviswanathan.com/node/53

Sir, you're the first to lay out so nicely how to work the mysterious xrandr option of adding a mode.

Althoug using OpenSuSE myself, you helped me a lot. And then to realize you wrote this 2 years ago!!

Wonder why there is so little out there about the new setup. It almost made me go back a few versions to be able to use the infamous SaX XOrg configurator...
You saved me from that horror! I had to use CRT1 instead of VGA, but one finds that out pretty quickly...

Thanks a bunch.