[linux-pm] [PATCH -mm] kexec jump -v9

[Eric W. Biederman]

Alan Stern <stern at rowland.harvard.edu> writes:

> On Wed, 19 Mar 2008, Rafael J. Wysocki wrote:
>
>> Well, I've been saying that for I-don't-remember-how-long: on my box, if you
>> use S5 instead of entering S4, the fan doesn't work correctly after the
>> resume.  Plain and simple.
>> 
>> Perhaps there's a problem with our ACPI drivers that causes this to happen,
>> but I have no idea what that can be at the moment.
>
> IMO it would be worthwhile to track this down.  It's a clear indication 
> that something is wrong somewhere.
>
> Could it be connected with the way the boot kernel hands control over
> to the image kernel?  Presumably ACPI isn't prepared to deal with that
> sort of thing during a boot from S5.  It would have to be fooled into
> thinking the two kernels were one and the same.

It should be easy to test if it is a hand over problem, by turning off
the laptop by placing it in S5 (shutdown -h now) and then booting same
kernel again.

Eric