On Mon, 2007-09-24 at 02:44 +0200, Michael Biebl wrote:
> While checking why suspend on battery doesn't work for me, I noticed,
> that the way it currently works, is to poll a fixed set of proc file
> names:
>
> /* battery and ac power checks */
> const gchar *battery_filenames[4] = {
> "/proc/acpi/ac_adapter/AC/state",
> "/proc/acpi/ac_adapter/AC0/state",
> "/proc/acpi/ac_adapter/ADp1/state",
> "/proc/acpi/ac_adapter/ACAD/state"
>
>
> This approach seems to be broken imho.
> First, in my case the correct path would be /proc/acpi/ac_adapter/C134/state.
> I'm also sure there are other paths/ways on different platforms.
> Second, we have to poll (currently every 2 secs) which defeats all the
> recent achievements (like tickless kernel).
>
> Is there a good reason, not to use hal? This would solve 1 and 2.
I dont know enough about hal to use it - any code examples?
hal writes the output to /proc/acpi/ac_adapter/
so we can just parse that periodically but I will change it do this
polling only when indexing is active.
Also there will only ever be one ac_adapter present so we can scan for
it
will fix now
jamie
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