Re: Radeon Framebuffer Driver in 2.6.3?

[Zilvinas Valinskas <zilvinas@gemtek.lt>]

On Fri, Feb 27, 2004 at 08:56:42PM +1100, Benjamin Herrenschmidt wrote:
> On Fri, 2004-02-27 at 21:06, arief# wrote:
> > Dear all.
> > 
> > 
> > This patch from Benjamin solved my problem.
> > 
> > To Zilvinas <zilvinas@gemtek.lt>, I've tried your suggestion to change
> > my XF86Config-4 file to include UseFBDev line. But it doesnt work. It
> > made my Xserver wont even start. But I'm not sure, it could be X problem
> > (Debian Unstable got some updated X package that I haven't got a chance
> > to upgrade to).
> 
> There is a problem with recent radeonfb's an X + UseFBDev. I think the
> problem is that XFree is claiming a mode whose virtual resolution is very
> large. I have to verify that (it works for me here). Radeonfb has
> limitations on what it allows on the virtual resolution in recent
> version to limit the ioremap'ing done in the kernel. Unfortunately,
> there is no simple way to "detach" one from the other at this point. 
> 
> I should modify radeonfb to crop the virtual resolution instead of
> failing though...
> 
> Can you try hacking in drivers/video/aty/radeon_base.c, function
> check_mode() and see why it fails ? (I think it's that function
> that is failing).

Not sure what was failing on Arief# laptop, here it works perfectly
fine. Hardware: Compaq EVO N800v, kernel 2.6.3 , frambuffer and 
UseFBDev "true" just fine. 

Without UseFBDev console had almost the same effects Arief has reported.
After "clear screen" ^L in console with X running in background, I see a
lot of artifacts ... UseFBDev made it go away.

BR

> 
> Ben.
> 
> 
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