ASUS M6 has problem with ACPI events being delayed

ASUS M6 has problem with ACPI events being delayed

[Stefan Seyfried]

Hi,

i am sitting in front of an ASUS M6811NEBH and am experiencing an strange
behaviour wrt ACPI events.

Doing "cat /proc/acpi/event", i immediately get a response on every button
press, but using acpid or powersaved, they get the events delayed, like if
they were put into a FIFO or like if the "write" from the kernel to 
/proc/acpi/event was buffered.

I got reports that this broke between the 2.6.5 kernel as delivered by
SUSE 9.1 (where it still worked fine) and 2.6.9pre as delivered by SUSE 9.2.
It still does not work with 2.6.11.4

/proc/interrupts shows an acpi interrupt is generated for every button press.
-- 
Stefan Seyfried



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Re: ASUS M6 has problem with ACPI events being delayed

[Jan Kasprzak]

Stefan Seyfried wrote:
: Hi,
: 
: i am sitting in front of an ASUS M6811NEBH and am experiencing an strange
: behaviour wrt ACPI events.
: 
: Doing "cat /proc/acpi/event", i immediately get a response on every button
: press, but using acpid or powersaved, they get the events delayed, like if
: they were put into a FIFO or like if the "write" from the kernel to 
: /proc/acpi/event was buffered.
: 
: I got reports that this broke between the 2.6.5 kernel as delivered by
: SUSE 9.1 (where it still worked fine) and 2.6.9pre as delivered by SUSE 9.2.
: It still does not work with 2.6.11.4
: 
: /proc/interrupts shows an acpi interrupt is generated for every button press.

	I used to have the same problem (Asus M6R), but it disappeared
after a kernel upgrade/reconfiguration. Unfortunately I cannot tell exactly
where the problem was. Do you use CONFIG_PREEMPT?

-Y.

-- 
| Jan "Yenya" Kasprzak  <kas at {fi.muni.cz - work | yenya.net - private}> |
| GPG: ID 1024/D3498839      Fingerprint 0D99A7FB206605D7 8B35FCDE05B18A5E |
| http://www.fi.muni.cz/~kas/   Czech Linux Homepage: http://www.linux.cz/ |
-- Yes. CVS is much denser.                                               --
-- CVS is also total crap. So your point is?             --Linus Torvalds --


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Re: ASUS M6 has problem with ACPI events being delayed

[Stefan Seyfried]

On Fri, May 20, 2005 at 03:23:40PM +0200, Jan Kasprzak wrote:
 
> 	I used to have the same problem (Asus M6R), but it disappeared
> after a kernel upgrade/reconfiguration. Unfortunately I cannot tell exactly
> where the problem was. Do you use CONFIG_PREEMPT?

No, i don't. Actually i was pointed to kernel-bugzilla bug #3851 and am
trying the burst-mode EC patch now (it is compiling), so let's see if this
helps.

The really strange thing for me is, that blocking read from /proc/acpi/event
(cat) seems to work fine, but non-blocking (with select / poll) doesn't.

Update: the burst-mode-EC patch helped, everything seems to work fine now.
Now i have to check for bad side-effects :-)
-- 
Stefan Seyfried



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