[ltp] Re: T410s and projector

[Claudius Hubig]

Leon Brokken <leon.brokken@med.lu.se> wrote:
>Screen 0: minimum 320 x 200, current 1440 x 900, maximum 8192 x 8192
>LVDS1 connected 1440x900+0+0 (normal left inverted right x axis y axis) 
>303mm x 190mm
>    1440x900       60.0*+   50.0
>    1024x768       60.0
>    800x600        60.3     56.2
>    640x480        59.9
>VGA1 connected (normal left inverted right x axis y axis)
>    1024x768       60.0
>    800x600        60.3     56.2
>    848x480        60.0
>    640x480        59.9
>
>I configured randr through the KDE interface. What would be the correct 
>syntax using xrandr to set the appropriate modes?
>
>I tried these (without any change):
>xrandr --output VGA1 --auto
>xrandr --output VGA1 --same-as LVDS1

To set 1024x768 via xrandr:

xrandr --output VGA1 --mode 1024x768

or (to create a new mode with a possibly correct modeline and both
hsync and vsync enabled):

xrandr --newmode "1024x768+h+v" 66.77 1024 1080 1184 1344  800 801 804 828 +hsync +vsync
xrandr --addmode VGA1 --mode "1024x768+h+v"
xrandr --output VGA1 --mode "1024x768+h+v"

The modeline given here was created with gtf. I found that playing
with (+/-)(h/v)sync was necessary to get my monitor to stop from
blanking every few minutes for half a second, so you might want to
give it a try.

Maybe reducing the refresh rate might be another option, so you might
try that as well (by generating the appropriate modeline with gtf).

Do you have another computer with which you could test if the
projector works properly?

Best regards,

Claudius
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