Re: [gpm] using info from apm for battery life

[Bee Hock Goh <beehock gmail com>]

On Sun, Jun 12, 2011 at 8:12 AM, Bee Hock Goh <beehock gmail com> wrote:
> On Sun, Jun 12, 2011 at 5:37 AM, Richard Hughes <hughsient gmail com> wrote:
>> On 11 June 2011 18:00, Bee Hock Goh <beehock gmail com> wrote:
>>> I am running ubuntu natty on my tablet. There battery driver seem to
>>> be broken. Its exposing battery and ac information on sysfs and
>>> gnome-power-manager is picking all information except the energy
>>> parameter resulting in a empty battery bar.
>>
>> What version of upower? We've got a lot better reading all the sysfs
>> entries in the last two releases thanks to Martins self test program.
>>
>
> its version 0.9.9
>
>>> However, its reflecting the percent remaining information correct on /proc/apm.
>>
>> /proc/apm has been deprecated upstream for years now. Fedora turned
>> off this legacy interface 3 or 4 releases ago.
>>
>>> Is there any way that I can use gnome-power-manger either to use only
>>> /proc/apm or get the battery life from apm instead?
>>
>> No, sorry. If you've got the latest version of upower and it still
>> doesn't work, you need to open a bug on kernel.org under the acpi
>> component. Working around brokenness like this in userspace is all
>> wrong.
>>
>> Richard.
>>
>
> I dont think its really a bug but a badly implemented kernel driver.
>
> Perhaps, i can modify upower to read apm instead of sysfs for the battery life?
>
> regards,
>  Hock.
>

Pardon, my ignorance. I believe the  /proc/apm is emulated. The
capacity that i see in apm -v seem to from sysfs.

Here's what what exported on /sys/class/power_supply/mxc_battery/

capacity
current_avg
device
health
manufacturer
power
present
status
subsystem
technology
temp
temp_ambient
type
uevent
voltage_avg
voltage_max_design
voltage_min_design
voltage_now