On Wed, Dec 24, 2003 at 03:52:57PM -0500, John Zielinski wrote:

Geert Uytterhoeven wrote:

quoted

On Wed, 24 Dec 2003, Sergey Vlasov wrote:

quoted

Probably this fudge factor was needed for some early chips?
  

Yep, Mach64 needs one (but atyfb doesn't take care of it yet). So if you 
switch
between depths, the display may shift horizontally. I guess this is due to
different lengths of the dataflow paths for different color depths.

How many cards handled by radeonfb need it?   That way we can add a 
fudge or nofudge driver option.  Or put it in the card database if the 
numbers are roughly equal.

I suspect that either none of these cards need it (if this is really a
leftover from Mach64 days), or maybe some of the oldest (R100) cards
need it.  Radeon VE QY (RV100) and 8500 QL (R200) certainly don't need
this fudge factor.

Does someone have an old R100-based card to test this?

I need to see if that's what's causing the sync problems with my friends 
HDTV....