Re: atyfb in 2.5.51

On Tue, 2002-12-10 at 23:31, Paul Mackerras wrote:

I tried 2.5.51 on my G3 powerbook (laptop), which has a Rage LT Pro
video chip (ID 0x4c49 or LI).  With the patch below, atyfb compiles
and seems to mostly work.  However, I didn't see any penguin on boot.
Instead the top inch or so of the screen was just black.

X seems to be running just fine.  I have 'Option "UseFBDev"' in my
/etc/X11/XF86Config-4.

AFAIK, the X "mach64" driver in XF 4.* doesn't care about UseFBDev.
Marc Aurele La France (maintainer of this driver) is basically allergic
to kernel fbdev support.

What doesn't work is changing VTs from X to a
text console.  If I press ctrl-alt-F1, for instance, the colormap
changes but I don't see anything get redrawn.  The screen looks just
like what I had in X but with the altered colormap.  If I then press
alt-F7, it switches back to X and X redraws the screen properly and
restores its colormap.

I don't know if happened with earlier fbdev versions for you, but one
possibility is that X reconfigures the display base, and possibly more
bits of the card's internal memory map. Either fbdev should restore
that, or adapt to what X set. On R128's and radeon's, this is things
like DISPLAY_BASE_ADDR.
 

The patch below also takes out the CONFIG_NVRAM stuff since it doesn't
work and I don't believe anyone has ever used it.

Yup, it's some wacky old pmac stuff that should be killed.
 

I have also tried aty128fb with some local patches to get it to
compile for my G4 powerbook.  It also doesn't draw the penguin, and it
oopses when X starts, for some reason.

Hrm... I'll have to test radeonfb... It worked yesteday in console (I
don't remember about the penguin) but I didn't try X.