Re: RadeonFB [Re: 2.4.23pre8 - ACPI Kernel Panic on boot]

[Benjamin Herrenschmidt <benh@kernel.crashing.org>]

On Sat, 2003-11-01 at 06:16, Kristofer T. Karas wrote:
> Benjamin Herrenschmidt wrote:
> 
> >Ok, first thing: XFree "radeon" _is_ accelerated, though it doesn't
> >do 3D on recent cards
> >
> Hi Ben - Right, sorry, I mean to apply "accelerated" to the 3D effects; 
> the private ATI driver is much faster on glxgears than the version that 
> bundles with XFree.
> 
> >Then, the problem you are having is well known
> >
> I'm having two, actually.  The first is that YPAN is getting quite 
> confused.  If I switch VCs, then switch back, the text has been 
> re-arranged, the cursor is often invisible, and sometimes a page or two 
> of new text must be written before anything starts to show up on the 
> screen again.  Experimenting shows that setting VYRES = YRES works 
> around this problem.

I'll have to look at this in more details. I don't see why ypan would
cause such screen re-arrangement though...

> The second problem is of course the register contents issue when 
> returning from certain graphics programs (e.g. X+fglr) to text mode..  I 
> rather like your idea of doing a re-init when switching from KD_GRAPHICS 
> to KD_TEXT, as the monitor blank during resolution switch will likely 
> overshadow the re-init process.
> 
> >Can you verify that running fbset -accel 0 then back 1 cures the
> >problem for you ?
> >  
> >
> 
> At work now, will try when I return home later...
> 
> Kris