Messages in this thread | | | Date | Thu, 20 Sep 2012 20:42:34 +0200 | From | François Boisson <> | Subject | shutdown with toshiba portege |
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Hey
I have a problem which seems to be related to shutdown for a Toshiba portege (it's seems that the problem is also on other Toshiba, on VAIO cw5, you can look at this thread on debian-user-french http://lists.debian.org/debian-user-french/2012/08/msg00164.html )
Symptoms (under 3.0, 3.1, 3.2, 3.3 and 3.5.2 and 3.5.4 amd64 kernels but not with 2.6.37-486-PAE kernel) under a TOSHIBA PORTEGE Z830/Portable PC, BIOS Version 1.60
If i shutdown the computer and wait some hours, the power consumption of the computer is not null, it's about the same as the power consumtion during a suspend of computer. In fact
Boot and halt with: Windows 7 ---> No power consumption after Linux 2.6.37-486-PAE ---> No power consumption after Linux >= 3.0 ---> Power consumption (about 45-50 mW if acpitool is correct)
I try 3.0, 3.1, 3.2.0 (Debian wheezy kernel), 3.3, 3.5.2 and 3.5.4 kernels. (System is a debian wheezy amd64 with (now) personnal kernel)
First I think it was something like Wake-On-Lan then Wake-on-WLan but I found nothing (WLAN and WWLAN are disabled or not present) Then I look on kernel source and I have found this in arch/x86/kernel/apic/apic.c :
[...] /* * If Linux enabled the LAPIC against the BIOS default disable it down before * re-entering the BIOS on shutdown. Otherwise the BIOS may get confused and * not power-off. Additionally clear all LVT entries before disable_local_APIC * for the case where Linux didn't enable the LAPIC. */ void lapic_shutdown(void) { [...]
I wonder if my problem is the problem describe here or something like. It seems that computer can be shutdown but some peripherics not power off. So I try to «trace» the shutdown process but I did not found the description a the kernel way to shutdown the computer. It seems that it's
* Shutdown all CPUs execpt the CPU0 * Shutdown local APIC * Shutdown computer but perhaps the problem is before these opérations.
Where can I verify that all is really power off before shutdown (with judicious printk for instance)
I try to look in kernel documentation but I did not found.
Thanks for any help or advices and sorry for noise if you think it is.
François Boisson -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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