Linux users of Sony Z1 series

[Cyril Wattebled <>]

Hi,

you wrote:
> # CPUFreq processor drivers
> CONFIG_X86_ACPI_CPUFREQ=y

Do not use x86 acpi driver, use Enhanced speedstep driver instead.
> battery lasted exactly 3 hours on my pcg-z1rmp.

Well, I get around 3.7 hours but actually, I'm using Speedfreqd as the 
speedstep daemon which gives great results. Powernowd works well also.

> the most scaring thing is the temperature of the hard disk that keeps
> spinning and heating up...

Well, same here but here is the trick. You have to setup your hdparm to 
make the drive stop to spin after some time. I use the following :
/sbin/hdparm -d1 -u1 -m16 -c3 -a 16384 -S 241 /dev/hda
This makes the drive to go to sleep if not used for 30 mins, increase 
the read ahead to 8 mo and setup various things like 32bit i/o, dma on 
.... This is the most optimized setting I've came up with.
Check the man of hdparm if you want your drive to go to sleep faster (-S 
option).
I use also the Laptop_mode of the kernel available in the new 2.6.7 
kernel and in the -mm patch set for earlier versions.
Install kernel 2.6.7 and read this file for further info :
/usr/src/linux/Documentation/laptop-mode.txt
Have fun !
> ciao,
ciao =]
--
Cyril Wattebled