Crash with linux-pmac-stable on iMac DV

With the current linux-pmax-stable, with the backport dmasound
patches, my iMac crashes every couple of days with the message:

vector: 400 at pc = eb5c2c44, msr = 40009032, sp = d2949e10 [d2949d60]
current = d2948000, pid = 476, comm = gdmlogin

Is this a known problem?  If not, what can I do to help debug this?

--
(domestic pets only, the antidote for overdose, milk.)
   larsi@gnus.org * Lars Magne Ingebrigtsen

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