mactel-linux-devel

[Mactel-linux-devel] battery alarm unsupported on macbook pro rev3?

[Steffen S. <pe...@gm...>]

Hi,

A few days ago I noticed that the battery alarm on my Santa Rosa Macbook
Pro is not working.

When 'battery' is loaded:

cat /proc/acpi/battery/BAT0/alarm 
alarm:                   unsupported


Witch sbshc and sbs do not even recognise a battery(no BAT0 dir).

The module help says sbs uses SMBus, so I activated i2c-core and
i2c-i801, but nothing..


Any hints on this? If this is not supported yet, how difficult would
that be?


/steffen

Re: [Mactel-linux-devel] battery alarm unsupported on macbook pro rev3?

[Soeren S. <mac...@nn...>]

On Sun, 2008-04-06 at 20:29 +0200, Steffen Schulz wrote:
> Hi,
> 
> A few days ago I noticed that the battery alarm on my Santa Rosa Macbook
> Pro is not working.
> 
> When 'battery' is loaded:
> 
> cat /proc/acpi/battery/BAT0/alarm 
> alarm:                   unsupported

what is battery alarm?

> Any hints on this? If this is not supported yet, how difficult would
> that be?

note that this is also not supported on mbp1,1's

Soeren

Re: [Mactel-linux-devel] battery alarm unsupported on macbook pro rev3?

[Steffen S. <pe...@gm...>]

On 080406 at 21:44, Soeren Sonnenburg wrote:
> On Sun, 2008-04-06 at 20:29 +0200, Steffen Schulz wrote:
> > cat /proc/acpi/battery/BAT0/alarm 
> > alarm:                   unsupported
> 
> what is battery alarm?

It seems to be mandatory to let acpi do something when the battery
status gets critical. I don't get acpi events, acpid doesn't put the
macbook to sleep.

So the goal is to get the laptop into s2ram without polling the
battery status..

Re: [Mactel-linux-devel] battery alarm unsupported on macbook pro rev3?

[Steffen S. <pe...@gm...>]

On 080406 at 22:53, Chris Nolan wrote:
> Steffen Schulz wrote:
>> So the goal is to get the laptop into s2ram without polling the
>> battery status..
> "[If the battery doesn't support alarms...] the ACPI specification  
> requires the OS to poll the battery to check its remaining capacity".
>
> Certainly on my Macbook 3,1 under Fedora, the laptop shuts down when the  
> battery reaches a critical level.

"...It appears that Linux does not yet do this."


So its a missing hardware feature. Unbelievable that neither the
battery module nor acpid or laptop-mode can handle this problem..


Thanks for the info!  *running yet another deamon*

/steffen
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