* Method for resetting embedded controller? @ 2003-10-09 1:06 Nigel Cunningham [not found] ` <1065661576.1807.7.camel-udXHSmD1qAy4CTf7w+cZoA@public.gmane.org> 0 siblings, 1 reply; 4+ messages in thread From: Nigel Cunningham @ 2003-10-09 1:06 UTC (permalink / raw) To: ACPI List Hi. I've been tracing the cause of keventd sometimes sucking all available CPU after a suspend-to-disk (2.4.22). It seems that the embedded controller in my Omnibook continally generates interrupts iif an ACPI event occurs at the wrong time during the cycle (I haven't determined when the critical time is yet). I'm therefore wondering if there is a method whereby it can be reset or otherwise made to return to its normal state. I'm particularly noticing this when a lid event occurs during suspend, whether or not button.o is insmod'd. If acpid is running, it shows thousands of lid events per second. Another swsusp user has reported similar issues. Regards, Nigel -- Nigel Cunningham 495 St Georges Road South, Hastings 4201, New Zealand Evolution (n): A process whereby infinitely improbable events occur with alarming frequency, order arises from chaos, and no one is given credit. ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. SourceForge.net hosts over 70,000 Open Source Projects. See the people who have HELPED US provide better services: Click here: http://sourceforge.net/supporters.php ^ permalink raw reply [flat|nested] 4+ messages in thread
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* Re: Method for resetting embedded controller? [not found] ` <1065661576.1807.7.camel-udXHSmD1qAy4CTf7w+cZoA@public.gmane.org> @ 2003-10-09 12:33 ` Karol Kozimor [not found] ` <20031009123326.GC13739-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org> 0 siblings, 1 reply; 4+ messages in thread From: Karol Kozimor @ 2003-10-09 12:33 UTC (permalink / raw) To: Nigel Cunningham; +Cc: ACPI List Thus wrote Nigel Cunningham: > I'm particularly noticing this when a lid event occurs during suspend, > whether or not button.o is insmod'd. If acpid is running, it shows > thousands of lid events per second. Another swsusp user has reported > similar issues. I experienced the same problem a couple of times. I wouldn't really blame lid, as I'm almost sure I had the lid event overflow when the lid button was not touched at all during the cycle. From what I understand, the situation is connected with thermal zone handling, I can almost be sure that if an active thermal trip point is hit during the resume process, the lid events will appear. I don't yet know if it's connected with bug #1185. FYI: 1) There *was* something in swsusp code that caused keventd to spit those events at resume specifically when the lid was closed during suspend, but that was an ancient version of the code and AFAIR you fixed it right away, 2) I've had this problem occasionally occuring for months and I remember I once managed to calm keventd down by suspending and resuming again, 3) This may indeed be somehow related to swsusp, as the occurence rate of this problem has risen with recent versions of swsusp (but there's too many variables to confirm that and trying to reproduce the problem is a tedious task). Best regards, -- Karol 'sziwan' Kozimor sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. SourceForge.net hosts over 70,000 Open Source Projects. See the people who have HELPED US provide better services: Click here: http://sourceforge.net/supporters.php ^ permalink raw reply [flat|nested] 4+ messages in thread
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* Re: Method for resetting embedded controller? [not found] ` <20031009123326.GC13739-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org> @ 2003-10-09 23:51 ` Karol Kozimor 2003-10-19 6:37 ` Jan Rychter 1 sibling, 0 replies; 4+ messages in thread From: Karol Kozimor @ 2003-10-09 23:51 UTC (permalink / raw) To: Nigel Cunningham, ACPI List Thus wrote Karol Kozimor: [...] Oops, you were probably right to blame the lid event for that behaviour. Closing the lid during suspend causes the keventd loop for me too (at least for rc10F). We've had such a problem once, haven't we? Best regards, -- Karol 'sziwan' Kozimor sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org ------------------------------------------------------- This SF.net email is sponsored by: SF.net Giveback Program. SourceForge.net hosts over 70,000 Open Source Projects. See the people who have HELPED US provide better services: Click here: http://sourceforge.net/supporters.php ^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: Method for resetting embedded controller? [not found] ` <20031009123326.GC13739-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org> 2003-10-09 23:51 ` Karol Kozimor @ 2003-10-19 6:37 ` Jan Rychter 1 sibling, 0 replies; 4+ messages in thread From: Jan Rychter @ 2003-10-19 6:37 UTC (permalink / raw) To: ACPI List >>>>> "Karol" == Karol Kozimor <sziwan-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org>: Karol> Thus wrote Nigel Cunningham: >> I'm particularly noticing this when a lid event occurs during >> suspend, whether or not button.o is insmod'd. If acpid is running, >> it shows thousands of lid events per second. Another swsusp user has >> reported similar issues. Karol> I experienced the same problem a couple of times. I wouldn't Karol> really blame lid, as I'm almost sure I had the lid event Karol> overflow when the lid button was not touched at all during the Karol> cycle. From what I understand, the situation is connected with Karol> thermal zone handling, I can almost be sure that if an active Karol> thermal trip point is hit during the resume process, the lid Karol> events will appear. I don't yet know if it's connected with bug Karol> #1185. [...] FWIW, I've also been encountering this problem from time to time. It seems to have subsided recently, for some reason. I think I've even reported it here (ACPI list), but it got ignored (as usual). --J. ------------------------------------------------------- This SF.net email sponsored by: Enterprise Linux Forum Conference & Expo The Event For Linux Datacenter Solutions & Strategies in The Enterprise Linux in the Boardroom; in the Front Office; & in the Server Room http://www.enterpriselinuxforum.com ^ permalink raw reply [flat|nested] 4+ messages in thread
end of thread, other threads:[~2003-10-19 6:37 UTC | newest] Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed) -- links below jump to the message on this page -- 2003-10-09 1:06 Method for resetting embedded controller? Nigel Cunningham [not found] ` <1065661576.1807.7.camel-udXHSmD1qAy4CTf7w+cZoA@public.gmane.org> 2003-10-09 12:33 ` Karol Kozimor [not found] ` <20031009123326.GC13739-DETuoxkZsSqrDJvtcaxF/A@public.gmane.org> 2003-10-09 23:51 ` Karol Kozimor 2003-10-19 6:37 ` Jan Rychter
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