Re: ATI Rage XL / Mach64GM hangs system when 'modprobe atyfb'

On Sat, Nov 19, 2005 at 06:19:24PM +0100, Miernik wrote:
> I have a HP t5500 system with a Transmeta Crusoe TM5800 CPU and a video
> chip ATI Mach64GM
> 
> (--) ATI(0): 8192 kB of SGRAM (2:1) 32-bit detected (using 8191 kB).
> (WW) ATI(0): Cannot shadow an accelerated frame buffer.
> (II) ATI(0): Engine XCLK 62.688 MHz;  Refresh rate code 1.

Hmm, one more board with 32bit memory and the BIOS uses a slow XCLK.

Try 'modprobe atyfb xclk=63'

What exactly is printed on your board's memory chip(s)?

I'm wondering if we should always cut the XCLK in half when we see a 
board with 32bit memory. The only counter example are my own XL boards 
that seemed perfectly happy with 125MHz XCLK. The memory chip is a 7 ns 
part so it should go up to 143 MHz. Of course there is the possibility 
that the chip does two memory accesses per XCLK with 32bit memory and I 
was just lucky in overclocking my memory to 250 MHz :) I'll have to 
check what XCLK the BIOS uses on my boards...

-- 
Ville Syrjälä
[email protected]
http://www.sci.fi/~syrjala/


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