how to debug a kernel that does not power off?
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From: Ákos Maróy on 23 Mar 2010 19:50 Hi, This might be a lame question, but: how would I debug a kernel that simply does not power off a machine? When powering off, on the console I get to the message: [...] Poweroff. but then, the machine actually does not power off. This is an HP Envy 15 laptop using an intel i7 CPU, and kernel 2.6.32.9. I tried to read up on all sorts of documentation, but could not get more debug info out of the kernel :( any pointers would be welcome.. Akos -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Arnout Vandecappelle on 26 Mar 2010 16:00 Take a look at the pm_power_off functions in arch/x86/kernel/apm_32.c Regards, Arnout On Wednesday 24 March 2010 00:44:30, �kos Mar�y wrote: > Hi, > > This might be a lame question, but: how would I debug a kernel that > simply does not power off a machine? When powering off, on the console I > get to the message: [...] Poweroff. > > but then, the machine actually does not power off. This is an HP Envy 15 > laptop using an intel i7 CPU, and kernel 2.6.32.9. > > I tried to read up on all sorts of documentation, but could not get more > debug info out of the kernel :( > > any pointers would be welcome.. > > > Akos > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" > in the body of a message to majordomo(a)vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- Arnout Vandecappelle arnout at mind be Senior Embedded Software Architect +32-16-286540 Essensium/Mind http://www.mind.be G.Geenslaan 9, 3001 Leuven, Belgium BE 872 984 063 RPR Leuven LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle GPG fingerprint: 31BB CF53 8660 6F88 345D 54CC A836 5879 20D7 CF43 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Robert Hancock on 26 Mar 2010 21:50
On 03/26/2010 01:56 PM, Arnout Vandecappelle wrote: > Take a look at the pm_power_off functions in arch/x86/kernel/apm_32.c > > Regards, > Arnout Any modern machine will be using ACPI functions to power off, not APM.. CCing the linux-acpi list. > > On Wednesday 24 March 2010 00:44:30, �kos Mar�y wrote: >> Hi, >> >> This might be a lame question, but: how would I debug a kernel that >> simply does not power off a machine? When powering off, on the console I >> get to the message: [...] Poweroff. >> >> but then, the machine actually does not power off. This is an HP Envy 15 >> laptop using an intel i7 CPU, and kernel 2.6.32.9. >> >> I tried to read up on all sorts of documentation, but could not get more >> debug info out of the kernel :( >> >> any pointers would be welcome.. >> >> >> Akos >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-kernel" >> in the body of a message to majordomo(a)vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> Please read the FAQ at http://www.tux.org/lkml/ > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |