I finally found out what happens when the system hangs, using netconsole.
I get this error message twice before the system dies:
ata1: command 0x25 timeout, stat 0x50 host_stat 0x4
It seems to happen faster when I work under X, then it is reproducible, I open
Thunderbird, type my password and it hangs. With the console I've had uptimes
of some hours, it's harder to trigger it.
The problem is also described here [1], although it's not exactly the same.
Find attached the kernel.log for that session.
Eduardo.
PS: As Ben suggested I added an entry for PowerMac8,2 in
arch/ppc64/kernel/pmac_feature.c.
[1] http://bugzilla.ubuntu.com/show_bug.cgi?id=12904
kern.log.bz2
Description: application/bzip2
