Messages in this thread | | | Subject | Re:No backlight control on PowerBook G4 | From | Benjamin Herrenschmidt <> | Date | Mon, 03 Nov 2003 11:45:34 +1100 |
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On Mon, 2003-11-03 at 06:23, Dustin Lang wrote: > Hi, > > I just bought a new PowerBook G4 and installed Linux on it. Now the > tweaking begins! One of the first orders of business is getting power > management working, and I'm a bit stuck.
You can't expect a machine just released a couple of weeks ago by Apple to be fully supported by linux, do you ? :)
> I'm running kernel version 2.4.22 with Ben Herrenschmidt's 2.4.23-pre5 > patches. > > On startup, arch/ppc/platform/pmac_backlight.c doesn't recognize the > backlight controller. It checks compatibility with a couple of specific > machines, and then checks compatibility with the backlight controller. > This appears to be the same check that is performed in the Darwin/xnu > kernel (at least the version that I found...).
If it's a new Mobility 9600 machine, then I expect my 2.6 tree (bk://ppc.bkbits.net/linuxppc-2.5-benh or rsync from source.mvista.com) to work, though the actual backlight "scale" may not be fully correct yet.
> Any (non-null) pointers would be appreciated!
Unfortunately, there's isn't much HW documentation available for these babies, other than reading Apple darwin source, Open Firmware forth code, etc...
Regarding overall power management (that is machine sleep), it is not supported on these machines yet. The blocking factor is the new ATI chip, which need to be rebooted from scratch. ATI told me they might be able to send me tables to do that though, so there is hope.
Ben.
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