On Fri, Sep 10, 2004 at 01:28:57PM +0800, Antonino A. Daplas wrote:

On Friday 10 September 2004 10:23, Benjamin Herrenschmidt wrote:

quoted

Recent changes upstream are breaking fbdev on pmacs.

I haven't had time to go deep into that (but I suspect Linus sees it
too on his own g5 unless he removed offb from his .config).

From what I see, it seems that offb is kicking in by default, reserves
the mmio regions, and then whatever chip driver loads can't access them.

offb is supposed to be a "fallback" driver in case no fbdev is taking
over, it should also be "forced" in with video=ofonly kernel command
line. This logic has been broken.

I dearly *hope* this is what I'm seeing with recent kernels, though I
have my doubts....  What I *do* know is that with recent bk snapshots
(post bk-1.2115) I have the following:  radeonfb seems to load, but when I
try to load X, my y-resolution seems to be half of what it ought to be...
The only code I see poking around at fb is yours...  *shrug*

-Happy to try new patches David