[ltp] Re: T410s and projector

[Leon Brokken]

On 07/26/2011 06:50 PM, Claudius Hubig wrote:
> 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).

Setting the refresh rate at 59 gives the best result so far, although 
not perfect. (+/-)(h/v)sync does not seem to have an effect:
"1024x768_59.00"  63.15  1024 1080 1184 1344  768 769 772 795  -HSync +Vsync

Will try out some more variations on the theme.

> Do you have another computer with which you could test if the
> projector works properly?
Projector works properly with another laptop. I have now tried with 
another projector, which gives the same vibrations. By the way, it 
vibrates in the horizontal direction (horizontal lines are fine, it's 
the verticals that are jittering).

Cheers, Leon.