Re: acpi_osi=Linux on a MSI Wind

On Friday 26 September 2008 21:57:28 Sven Burmeister wrote:
> Hello!
>
> I got a MSI Wind and since the battery only lasts for 1-1,5 hours I had a
> look at several powersaving realted things.
>
> One thing I tried was acpi_osi=Linux. I noticed that some some figures
> changed after that.
Vendors should not identify Linux as the OS anymore.
Can you send me privately acpidump and dmidecode output, pls.

> For example the "maximum allowed latency" in 
> /proc/acpi/processor/CPU0/power increased. I searched on the web but could
> not find any detailed info about it. Can somebody tell me what it means if
> the number increases?
This is the value for the BIOS to tell the OS how long the CPU will take to
wake up from sleep.
Can you paste /proc/acpi/processor/CPU0/power
Depending on whether your system makes proper use of the C-states a slightly
increased value should not matter.

> As far as I can see all keys and resuming etc work with acpi_osi=Linux, as
> they do without it. Should I leave it active or not? Are there any other
> test that I could do in order see what that setting changes?
>
> Another question I have is, I had to put "hdparm -B 254 /dev/sda" into
> boot.local in order to prevent the harddisk from clicking every 5 seconds.
> Yet after resuming (suspend to disk), that setting is gone. Is there a way
> to apply it automatically when resuming?
AFAIK there is a README in the pm-utils package included. This should be
the package you want to have a look at.
>
> When running powertop it tells me that I could stop HAL polling the CD-ROM
> drive.
> The Wind does not have one, yet it seems to poll the card reader or 
> something like that. Is there are way to tell HAL to poll less often
> instead of killing it completely?
Can you past the output of a typical powertop output on your machine, pls.

  Thomas