To my delight, this does appear fixed with:
Linux ubuntu 2.6.35-22-generic #33-Ubuntu SMP Sun Sep 19 20:34:50 UTC 2010 i686
GNU/Linux
using the current 10.10 RC desktop CD (i386). I assume the patch referenced in
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/475704/comments/18 landed?
Unfortunately the machine still freezes with no display when resuming
from suspend, probably unrelated.
Unfortunately the ACPI chatter is replaced by as much "serial8250: too
much work for irq17" noise, but that's an unrelated bug.*
*Footnote: Apparently due to presence of this modem, which happens to be
sharing IRQ17 with the Radeon and AC97 controller, go figure. Will hunt down
the right bug for this one...
02:09.0 Modem: Motorola SM56 Data Fax Modem (rev 04) (prog-if 00 [Generic])
Subsystem: Motorola Device 3020
Flags: bus master, stepping, medium devsel, latency 64, IRQ 17
Memory at fdcfd000 (32-bit, non-prefetchable) [size=4K]
I/O ports at da00 [size=256]
Capabilities: <access denied>
Kernel driver in use: serial
--
Karmic desktop livecd constant kernel ACPI exception messages: AE_LIMIT,
Returned by Handler for [SystemIO] 20090521 evregion-424
https://bugs.launchpad.net/bugs/475704
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