Adding undetected resolutions on my sony vaio z41 + SyncMaster223BW

Aug 05

Source : https://wiki.ubuntu.com/X/Config/Resolution#Adding%20undetected%20resolutions

Commands :

xrandr to show all the available configs, where I can see that my second sreen (on Iiyama ProLite E2607WS) miss the correct resolution 1920×1200 (60hz).

So I must add the mode for xrandr :

Find the correct modLine to add :cvt 1920 1200 wich output # 1920x1200 59.88 Hz (CVT 2.30MA) hsync: 74.56 kHz; pclk: 193.25 MHz Modeline "1920x1200_60.00" 193.25 1920 2056 2256 2592 1200 1203 1209 1245 -hsync +vsync

Copy the second line without “Modeline” and Paste it in xrandr –newmode command :

xrandr --newmode "1920x1200_60.00"  193.25  1920 2056 2256 2592  1200 1203 1209 1245 -hsync +vsync

Add this new mode to ~~LVDS~~ VGA output (you can see the correct name for resolution string with the command xrandr, without argument) :
```
xrandr --addmode VGA 1920x1200_60.00
```

Tried without success to do :

xrandr --ouptut VGA --mode VGA 1920x1200_60.00

Finish the job with gui utility “screen resolution” (“System > preferences > Screen Resolution”)

NB. With my former monitor (a samsunc syncMaster 223BW), my second screen was flickering. It was du to noise in the ground wire of the installation. When I was disconnecting my laptop from AC power, the flickering was stopping (found the idea on the net after several hours searching for a software/driver problem…). So, I plugged the monitor on a 2 ground plug (you can use a 3 to 2 grounds adaptor), and the flickering was over.

This howto can be used for any screen/graphic card combination if your native screen resolution is missing.

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