default screen resolution

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oz42
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Joined: Sun Aug 04, 2013 2:36 pm

default screen resolution

Post by oz42 »

Hi,

how can I set the default screen resolution *before* logging in? I mean, without cvt and xrandr voodoo. It would be nice to have a control panel option for this.

Olaf
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I2k4
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Re: default screen resolution

Post by I2k4 »

Howdy,

It sounds like you know enough to have figured out how to obtain the right "newmode" settings and are just weary of entering them in terminal every boot. This works perfectly on M17 Cinnamon and XFCE for my Samsung monitor - obviously you'll replace with your own settings - it begins to boot at low res and you can see it change before the desktop shows up:

$sudo gedit ~/.xprofile

in the blank document add the three xrandr lines:

xrandr --newmode "1904x1200_60.00" 191.00 1904 2032 2232 2560 1200 1203 1213 1245 -hsync +vsync

xrandr --addmode VGA1 1904x1200_60.00

xrandr --output VGA1 --mode 1904x1200_60.00

You may have to go into file manager properties for the file (be sure you view hidden files) to make the file executable if the dot .xprofile doesn't execute when you try it. Good luck.
TRUST BUT VERIFY any advice from anybody, including me. Mint/Ubuntu user since 10.04 LTS. LM20 64 bit XFCE (Dell 1520). Dual booting LM20 XFCE / Win7 (Lenovo desktop and Acer netbook).
oz42
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Re: default screen resolution

Post by oz42 »

Thank you for the information, but ~/.xprofile affects only the user that is logged in. I would like to change the login screen's resolution.
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roblm
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Re: default screen resolution

Post by roblm »

Add the 3 xrandr command lines to “/etc/mdm/Init/Default”, so they will be executed before the Login screen. Open the file with this
command in the Terminal:

Code: Select all

gksudo gedit /etc/mdm/Init/Default
Put the lines at the bottom, just above the last line that says “exit 0”.
oz42
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Re: default screen resolution

Post by oz42 »

Thank you for pointing into the right direction! In fact, it had been much easier.

I logged in (and got my preferred screen resolution) and just ran xrandr:

Code: Select all

Virtual1 connected primary 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   800x600        60.0 +   60.3
   2560x1600      60.0
   1920x1440      60.0
   1856x1392      60.0
   1792x1344      60.0
   1920x1200      59.9
   1600x1200      60.0
   1680x1050      60.0
   1400x1050      60.0
   1280x1024      60.0
   1440x900       59.9
   1280x960       60.0
   1360x768       60.0
   1280x800       59.8
   1152x864       75.0
   1280x768       59.9
   1024x768       60.0*
   640x480        59.9
So I just had to put one line into /etc/mdm/Init/Default:

Code: Select all

xrandr --output Virtual1 --mode "1024x768"
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