In message <20030208010857.GC16599@vex>, David Maxwell writes:
>On Fri, Feb 07, 2003 at 06:47:55PM -0500, Steven M. Bellovin wrote:
>> >could you provide a backtrace of a crash? Otherwise, I'm afraid, this
>> 
>> I wish I could, but I don't know how to get one.  The machine locks up 
>> hard, and the only way I know to reset it -- this is a laptop -- is to 
>> lean on the power button for several seconds.  ctl+alt+esc doesn't work 
>> at that point, as best I can tell, though since I'm in X I'm not 100% 
>
>I have a NEC Versa LX running a 'few days old' -current. I have some
>similar issues...
>
>Cardbus activities won't hang the machine, but sometimes the card isn't
>recognized and the network interface (tlp0) doesn't appear.
>
>Using apm -S will take the machine to a light sleep that I can recover
>from.
>
>Using apm -z will suspend the machine, but when I wake it up, the first
>disk access will hang the machine, with a couple ATA timeout and DMA
>errors, after which the hang is complete - can't get to ddb anymore.
>
>With some tips from Manuel, I single-stepped after waking the machine,
>and found that the hang happens on an inb instruction, which I believe
>is part of the bus_space_read_1() in ic/wdc.c/wdcwait() - it seems like
>my pciide controller is not reset properly after the suspend.
>
>When the machine hangs, the HD light is on solid as well. 
>
>Does any of that match what you've seen?

Not really.  I've sometimes seen a failure to notice a card insertion, 
but not reproducibly.  I can usually suspend/resume, but not always.


		--Steve Bellovin, http://www.research.att.com/~smb (me)
		http://www.wilyhacker.com (2nd edition of "Firewalls" book)