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Date: Sat, 12 Nov 2011 03:41:12 +0000 From: Arnd Bergmann <arnd@...db.de> To: "Rafael J. Wysocki" <rjw@...k.pl> Cc: linux-kernel@...r.kernel.org Subject: Re: [bisected][bug] commit e978aa7d7d57d04eb5f88 breaks suspend on laptop. On Saturday, November 12, 2011, Rafael J. Wysocki wrote: > If that's "acpi_idle", the appended patch should help (it works for > me at least). Hi Rafael, I currently have limited email connectivity but I happened to bisect the same bug and your patch fixes it for me. I am certainly on acpi_idle with my thinkpad w500. Sorry for breaking the email threading and dropping people from Cc. > From: Rafael J. Wysocki <rjw@...k.pl> > Subject: ACPI / cpuidle: Remove acpi_idle_suspend (to fix suspend regression) > After commit e978aa7d7d57d04eb5f88a7507c4fb98577def77 (cpuidle: Move > dev->last_residency update to driver enter routine; remove > dev->last_state) setting acpi_idle_suspend to 1 by > acpi_processor_suspend() causes the ACPI cpuidle routines to return > error codes continuously, which in turn causes cpuidle to lock up > (hard). However, acpi_idle_suspend doesn't appear to be useful for > any purpose (it's racy and doesn't really provide any real > protection), so it can be removed, which makes the problem go away. > > Signed-off-by: Rafael J. Wysocki <rjw@...k.pl> Tested-by: Arnd Bergmann <arnd@...db.de> Arnd -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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