I reported a problem with ACPI suspend on a Compaq Presario X1050 laptop
a while ago:
http://bugzilla.kernel.org/show_bug.cgi?id=6075
Essentially when coming out of suspend I get ACPI execution errors like:
ACPI: read EC, IB not empty
ACPI Exception (evregion-0409): AE_TIME, Returned by Handler for
[EmbeddedControl] [20060127]
ACPI Exception (dswexec-0458): AE_TIME, While resolving operands for
[AE_NOT_CONFIGURED] [20060127]
ACPI Error (psparse-0517): Method parse/execution failed
[\_SB_.C046.C059.C0EA.C11D] (Node dfea0280), AE_TIME
ACPI Error (psparse-0517): Method parse/execution failed [\_WAK] (Node
c14dc500), AE_TIME
After this point, the battery status is no longer reported, the keyboard
starts losing keypresses and the mouse pointer tends to freeze up for a
while and then unstick. What ACPI seems to be having problems with is
that the ACPI Embedded Controller seems to be in a wacked-out state
where it appears to not process its input. As well, the keyboard/PS2
controller is messed up and keeps losing sync. Since these are
apparently usually the same physical hardware, this isn't too surprising
to see both problems.
Another user mentioned recently. that removing USB and IEEE1394 modules
prevented the problem on his HP laptop. For me, if the ohci_hcd,
ehci_hcd and ohci1394 modules are removed, suspend indeed appears to
work. I haven't tested all possible combinations, but it seems that if
any of those are loaded, the problem shows up. I've seen a number of
suspend scripts people have written that remove at least the USB modules
before suspend and reload them afterwards, but this seems like a rather
brutal hack.
I can possibly imagine some BIOS SMM code causing problems on the USB
side, but I'm not sure how the 1394 module could be involved here..
Does anyone have any ideas as to how I could help debug this further?
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from [email protected]
Home Page: http://www.roberthancock.com/
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