[SOLVED] Get higher video resolution with "Unknown Monitor"

cccc · 11-10-2011, 05:38 PM

hi

I have squeeze installed and the highest video resolution is 1024x768.
The Monitor is DELL 1909Wf 16:9 and is recognized as "Unknown Monitor".
Howto get higher resolution, for example 1440x900?

zrdc28 · 11-10-2011, 08:56 PM

Xrandr is what you need, it is in the repository.

jens · 11-11-2011, 09:35 AM

Try forcing it in xorg.conf using modline.
Just run gtf 1440 900 60 and it will create a modline for you.

PS: see man gtf

Edit: The "Unknown Monitor" with 1024x768 part usually means that your monitor doesn't provide a correct (or supported) EDID (and/or DCC) for xorg.

cccc · 11-11-2011, 04:50 PM

I've done the following:

Code:

$ cvt 1440 900
# 1440x900 59.89 Hz (CVT 1.30MA) hsync: 55.93 kHz; pclk: 106.50 MHz
Modeline "1440x900_60.00"  106.50  1440 1528 1672 1904  900 903 909 934 -hsync +vsync
sta@WDElinux4:~$ xrandr --newmode "1440x900_60.00"  106.50  1440 1528 1672 1904  900 903 909 934 -hsync +vsync
$ xrandr
Screen 0: minimum 320 x 200, current 1024 x 768, maximum 8192 x 8192
VGA1 connected 1024x768+0+0 (normal left inverted right x axis y axis) 0mm x 0mm
   1024x768       60.0* 
   800x600        60.3     56.2  
   848x480        60.0  
   640x480        59.9  
HDMI1 disconnected (normal left inverted right x axis y axis)
DP1 disconnected (normal left inverted right x axis y axis)
  1440x900_60.00 (0xb2)  106.5MHz
        h: width  1440 start 1528 end 1672 total 1904 skew    0 clock   55.9KHz
        v: height  900 start  903 end  909 total  934           clock   59.9Hz
$ xrandr --addmode VGA1 1440x900_60.00

and 1440x900 is available in gnome-display-properties.

BTW to hardcode these settings after restart, pls add in /etc/gdm3/Init/Default,
before exit 0, the following lines:

Code:

xrandr --newmode "1440x900_60.00"  106.50  1440 1528 1672 1904  900 903 909 934 -hsync +vsync
xrandr --addmode VGA1 1440x900_60.00