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

[Kristofer T. Karas]

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.

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

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