PowerBook 12" hangs right after attaching ams0

[Bruce Cran]

On Thu, Oct 30, 2008 at 11:10:47AM -0500, Nathan Whitehorn wrote:
> Ed Schouten wrote:
>> Hello Nathan,
>>
>> * Nathan Whitehorn <nwhitehorn at freebsd.org> wrote:
>>> Drat. Could you try the patch at
>>> http://people.freebsd.org/~nwhitehorn/adb-delayed-attach.diff?
>>
>> After applying the patch, it still gets stuck during boot.
>
> Could you try the latest HEAD? I poked around at my machines this  
> morning to try to make them hang, succeeded, and then fixed some  
> problems that make mouse probes hang after the keyboard is probed  
> successfully.
>
>>> Unfortunately, ams0's attach doesn't have any debug information in it.
>>> It is stuck somewhere between lines 171 and 183 of adb_mouse.c, if you
>>> want to fill it with printf().
>>
>> I can confirm it indeed gets stuck in adb_mouse_attach(), namely during
>> its call to adb_set_device_handler(). I've just added a `return (ENXIO)'
>> to adb_mouse_probe(), so I can at least boot my PowerBook for now. The
>> keyboard support rocks. Thanks! :-)
>
> That's about what I expected. The change I added make it retry commands  
> like that if they get stuck, inside of looping forever on a reply. Glad  
> your keyboard works, though!
>
>> There are some random things I still have to look into:
>>
>> - I've dd'd the boot loader to /dev/ad0s2, but for some reason my Mac
>>   still refuses to boot from it.
>
> What is the partition type (gpart show) for ad0s2? I think it might need  
> to be set to !Apple_Bootstrap. The partition size may also need to be  
> exactly 800K. You should be able to change both of these things with the  
> system up, though you might need to enable foot shooting in geom.
>
>> - The processor still runs at 533 MHz. I think Linux also did this when
>>   I tried it 3-4 years ago.
>
> OF sets it to this at boot. I think there is something you can change at  
> the firmware prompt to bring it up to full speed, but my memory is foggy.
>

On my iBook G4 you can configure the CPU to run at the max frequency
with:

dev /cpus/PowerPC,G4 at 0
set-dfs-high

OF uses a tree for navigation: instead of 'cd' you change 'directories' using 
the 'dev' command.  You can run 'ls' to see what sub-directories are available 
and run 'words' to see what commands are available.

-- 
Bruce