Re: [Linux-fbdev-users] Atyfb: Screen garbled on Fujitsu FMV-253L

[Ville <sy...@sc...>]

On Sun, Apr 22, 2007 at 08:13:19PM +0200, Stephan Diestelhorst wrote:
> > > With the panels native resolution of 1024x512, I can see that the screen
> > > is initialised properly (to the full resolution), but consists only of
> > > white on-pixel-wide vertical stripes. Some sort of blinking in the area
> > > of the curser is also visible.
> >
> > Try booting with video=atyfb:xclk:63.
> 
> Thanks, that helps partly! I can see a proper picture, however just in the 
> left 2/3 of the screen, I guess that is 640x480. It is also slightly shifted 
> downward. What does xclk do?

It sets the memory clock to 63 MHz. Typically the BIOS tables specify
125 MHz, but for some laptops that's too much. There have been a few
reports about laptops with 32bit memory interfaces that require halved
XCLK (I had one). Please post the boot messages from atyfb so I can
confirm that your case is similar.

> Where can I find proper docs for the driver? (In 
> the usual place aka. the source?)

Yes.

-- 
Ville Syrjälä
sy...@sc...
http://www.sci.fi/~syrjala/