Re: video mirroring on G3 (mach64) powerbooks
On Mon, 24 Sep 2001, Josh Huber wrote:
> I've added support to the atyfb driver for video mirroring, much like
> Ben's m3mirror setup he's got going in the aty128fb driver.
>
> * if I enable/disable anything while in X it doesn't work quite right
> -- the effects seem to be delayed until I exit X.
X uses the secondary MMIO and disables the primary MMIO. So you end up changing
the underlying video memory instead of the MMIO registers.
Solution: make atyfb use the secondary MMIO and disable the primary MMIO too.
As a side effect, we gain 4 kB of video memory on systems with 8 MB.
Gr{oetje,eeting}s,
Geert
P.S. Doesn't this belong more on linux-fbdev-devel and linuxppc-dev than on a
Debian-specific list?
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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