check for power state only when ACPI is available

[arighi]

In bbswitch_off() we use acpi_bus_get_device() to determine the power state, but this feature is only available if ACPI is enabled in the kernel, so make sure to do this check only when ACPI is available.

Fixes: 5593d95 ("Linux 3.8 compatibility hack") Signed-off-by: Dimitri John Ledkov dimitri.ledkov@canonical.com Signed-off-by: Andrea Righi andrea.righi@canonical.com

[bluca]

can you target the develop branch please?

[arighi]

@bluca it should target develop now, thanks!

[bluca]

You need to rebase your branch too

[arighi]

You need to rebase your branch too

@bluca I think it's rebased already, I re-applied my patch on top of devel and force pushed to my branch. Am I missing something?

[bluca]

Yes, it's the target that needed switching, done