TEST: Sleep suppport for iBook G4 & Aluminium PowerBooks (ATI based)

Benjamin Herrenschmidt benh at kernel.crashing.org
Mon Nov 22 08:36:34 EST 2004

On Sun, 2004-11-21 at 11:37 -0600, Olof Johansson wrote:
> On Sun, Nov 21, 2004 at 11:01:08AM +1100, Benjamin Herrenschmidt wrote:
> > > Ok, I already found a bug, occasional lockups on boot and when setting
> > > the backlight. I uploaded a new version at:
> > 
> > Here's a 3rd version. It may or may not help, as I didn't have a chance
> > to test this one on either albook or ibook g4 yet. I added saving and
> > restoring of a few more registers that may fix the Xv problem (or not...
> > depends what X does at this point) and eventually some corruption
> > problem (the bandwidth related registers weren't restored).
> This one caused problems for me. Looks like the backlight got turned off
> at boot, I had to sleep it and wake it up to get it back.

There have been no change regarding backlight at boot, could just be
some latent problem... Next time it happens, test what happens if turn
the backlight all the way down to 0 (with the backlight keys), wait a
bit, then back up.


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