Recovering from kernel hangs

[Tony Breeds]

On Tue, Dec 14, 2010 at 04:46:19PM -0800, juugcatm at juug.net wrote:
> Is there any way to recover from a kernel hang with Yaboot? I've
> read about the printk messages being stored in RAM on some embedded
> devices and they can be accessed via the bootloader. Is there any
> technique for doing this? I'm trying to get KMS working on my TiBook
> G4, and all kernels >2.6.34 hang on boot with KMS enabled by
> default.

Not really, once the kernel is running yaboot is no longer resident in memory.

If it existed it would be possible to teach yaboot to read a persisent store
and boot a different kernel but that's really all I can think of.

Yours Tony