Re: [Linux-fbdev-users] 16/9 fb resolution

[Torgeir V. <to...@po...>]

On Fri, 2005-04-08 at 11:11 +0200, Dely Nicolas wrote:
> Hi,
> 
> Is it possible to have 16:9 resolution in framebuffer?
> 
> maybe 1280x768 about ?
> 
> Has anybody link or documentation on it?

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/lin...@li.../msg15331.html

mode "1280x768 50Hz 32bit"
    geometry 1280 768 1280 768 32
    timings 11415 248 16 144 30 1 3
endmode




-- 
Torgeir Veimo <to...@po...>