Date: Wed, 11 Jul 2007 17:58:01 +0300 From: Cristian KLEIN <cristi@net.utcluj.ro> To: freebsd-current@freebsd.org Subject: Re: acpi forced suspending panics Message-ID: <4694EFF9.2060505@net.utcluj.ro> In-Reply-To: <62195.193.226.6.226.1184091201.squirrel@intranet.utcluj.ro> References: <62195.193.226.6.226.1184091201.squirrel@intranet.utcluj.ro>
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Cristian KLEIN wrote: > Hi everybody, > > I compiled FreeBSD-CURRENT a few days ago on an IBM Thinkpad R51. Whenever > I try to suspend the system using Fn+F4, the system will wait 10 seconds > then panic: > > acpi: suspend request timed out, forcing sleep now > panic: Trying sleep, but thread marked as sleeping prohibited > > I have a handwritten backtrace if anybody is interested. I don't know what > requires the forced suspend, but the panic is triggered by the following > events: > > * acpi_ReqSleepState() notifies the userspace that the system is going to > sleep and initializes a callout, using callout_reset(), which will call > acpi_sleep_force() (dev/acpica/acpi.c:2203) > * softclock() will mark the current thread as non-sleepable > (kern/kern_timeout.c:280) then call acpi_sleep_force(), through the > callout mechanism > * acpi_sleep_force() will go on, and suspend all devices > * some time later, the cardbus driver will call pause() on this very > non-sleepable thread (dev/pccbb/pccbb.c:1242), which, naturally, results > in a panic. > > I don't really know how to solve the problem. If I insert > THREAD_SLEEPING_OK() in acpi_sleep_force(), then the system will not panic > anymore, but it doesn't suspend either and it becomes unusable. > > Note that the kernel from 7.0-200706 did not have this issue (although it > had other). This problem was caused by world not being up-to-date, espacially acpiconf, devd and /etc/rc.suspend. Sorry for the noise. There are however other suspending issues which I will highlight in another thread.
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