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SubjectRe: Linux not shutting down all devices? Battery drain in after shutdown
On Thu 2009-09-17 14:24:51, Norbert Preining wrote:
> Dear all,
> I have a very strange problem with my Sony VAIO Z11 laptop. When I turn
> it off in Linux it still drains battery, and quite a lot indeed, several
> percent per hour.
> Interestingly, when shutting down from Windows XP the same doesn't happen,
> after 10 hours of off time starting from 100% charge after rebooting I have
> still 98.8%, so that is fine (counting that booting costs some energy).
> This is in fact also a problem for many other users using Windows, too,
> see [1]. I have checked that on Windows all devices are set up so that
> at shutdown and hibernation (S4 and S5) they are going to off state (D3).
> The only thing I can imagine is that one of the devices not completely
> of not at all supported by the kernel is not properly shut down.
> AFAIS the only device which I have not running here is the fingerprint
> scanner.
> My questions are:
> - is there a way and if how to check that all devices will get properly
> shut down on halt?
> - is there any other reason the battery drain might happen?
> Some details about the laptop:
> - it has a dual graphic card (Intel and nVidia), the sony-laptop module
> (extended for the zseries, see [2], with adaption to 2.6.31 by me [3]),
> or the stock kernel sony-laptop plus the nvidia-control module
> (by Matthew Garret [4]) can be used to turn the nvidia card of on a
> running system so that it does not draw any energy
> - lspci -vvv output is attached as lspci.txt
> - software running is Debian/sid with kernel 2.6.31

On PC, keyboard driver is expected to shut down the machine; I'd try
complaining to Sony, perhaps they have newer bios.

(cesky, pictures)

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