Re: 16/9 fb resolution

On Fri, 2005-04-08 at 11:10 +0100, Torgeir Veimo wrote:

> Of course! I use 1280x720, not 768 though. I have these in
> my /etc/fb.modes file;
> 
> # 50 Hz
> mode "1280x720-50"
>    # D: 61.80 MHz, H: 37.50 kHz, V: 50.00 Hz
>    geometry 1280 720 1280 720 32
>    timings 16181 218 110 20 5 40 5
> endmode
> 
> # 60 Hz 
> mode "1280x720-60"
>    # D: 74.25 MHz, H: 45.00 kHz, V: 60.00 Hz
>    geometry 1280 720 1280 720 16
>    timings 13468 220 110 20 5 40 5
> endmode
> 
> Then an fbset "1280x720-50" does the trick. Or if you use DirectFB
> applications, just put in your /etc/directfb file;
> 
> mode=1280x720
> depth=32
> 
> to use this resolution by default.
> 
> To use 1280x768, you need to find the right timing parameters. You might
> find a modeline for X, and calculate the correct values for fb.modes;
> 
> http://www.faqs.org/docs/Linux-HOWTO/Framebuffer-HOWTO.html#s18
> 
> Using google usually gives you something usable, eg. 
> 
> http://www.mail-archive.com/[email protected]/msg15331.html
> 
> mode "1280x768 50Hz 32bit"
>     geometry 1280 768 1280 768 32
>     timings 11415 248 16 144 30 1 3
> endmode

Oh thank you very much, it's right 1280x720 is exactly 16/9, but I try
with a Thomson Scenium and its resolution seems to be 1280x768, so thank
you for these last lines too.


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