sony-vaio-z-series team mailing list archive

[Adam Hill <sidepipeuk@xxxxxxxxx>]

	This is subtle, but you aren't running the redirect as root, you are 
running it as your user, so although "echo 1" is run as root, its your user 
that tries to take that output and send it to the file, which won't work.

	Try:

sudo sh -c 'echo 1 >/sys/devices/platform/sony-laptop/battery_care_limiter'

Adam

On Wednesday 27 July 2011 09:18:32 Brett Howard wrote:
> Ok so I've got a 3.0 kernel in place along with the headers and I've
> been able to compile and load this module... I now have the files in
> place...  However running "sudo echo 1 >
> /sys/devices/platform/sony-laptop/battery_care_limiter" results in a
> permission denied...
> 
> Any thoughts?
> 
> ~Brett
> 
> On Sun, Jul 24, 2011 at 6:51 PM, Norbert Preining <preining@xxxxxxxx> wrote:
> > On Fr, 22 Jul 2011, Brett Howard wrote:
> >> How does one set the battery care function once running this kernel?
> > 
> > Short description I wrote up ...
> > ---------------------------
> > The following files in /sys/devices/platform/sony-laptop
> > allow controlling various aspects.
> > 
> > The documentation here was created by Norbert Preining by reading the
> > source, so it might be wrong and burn your computer ;-)
> > 
> > lid_resume_control
> >        controls resume when lid is opened
> >        0       do nothing
> >        1       resume from S4 (ram)
> >        2       resume from S3 (disk)
> >        3       resume from S4 and S3
> > 
> > odd_power
> >        controls the cdrom drive connection
> >        0       disconnected (off)
> >        1       connected (on)
> > 
> > battery_care_limiter
> >        controls up to which level a battery is charged
> >        0       no limit
> >        1       80%
> >        2       50%
> > 
> > thermal_control
> >        controls the temperature/fan activity (AFAIU)
> >        0       balanced
> >        1       performance
> >        2       silent
> > 
> > thermal_profiles
> >        number of different profiles???
> > 
> > touchpad
> >        turns touchpad on or off
> >        0       off
> >        1       on
> > 
> > -------------------------------------
> > 
> >> there some user space application that comes along for the ride?  I've
> > 
> > Yes, there is a user space, actually two: "cat" and "echo", the first
> > for reading the value of the setting above, the other for writing ;-)
> > 
> > Best wishes
> > 
> > Norbert
> > ------------------------------------------------------------------------
> > Norbert Preining            preining@{jaist.ac.jp, logic.at, debian.org}
> > JAIST, Japan                                 TeX Live & Debian Developer
> > DSA: 0x09C5B094   fp: 14DF 2E6C 0307 BE6D AD76  A9C0 D2BF 4AA3 09C5 B094
> > ------------------------------------------------------------------------
> > SWANAGE (pl.n.)
> > Swanage is the series of diversionary tactics used when trying to
> > cover up the existence of a glossop (q.v.) and may include (a)
> > uttering a high-pitched laugh and pointing out of the window (NB. this
> > doesn't work more that twice); (b) sneezing as loudly as possible and
> > wiping the glossop off the table in the same movement as whipping out
> > your handkerchief; (c) saying 'Christ! I seen to have dropped some
> > shit on your table' (very unwise); (d) saying 'Christ, who did that?'
> > (better) (e) pressing your elbow on the glossop itself and working
> > your arms slowly to the edge of the table; (f) leaving the glossop
> > where it is but moving a plate over it and putting up with sitting at
> > an uncomfortable angle the rest of the meal; or, if the glossop is in
> > too exposed a position, (g) leaving it there unremarked except for the
> > occasional humorous glance.
> >                        --- Douglas Adams, The Meaning of Liff
> 
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