[tesla-dev] [powertop bug]:Battery info not shown when running PowerTop through VirtualBox

[Aubrey Li]

Eric Saxe wrote:
> Aubrey Li wrote:
>>
>> I believe this bug should be reported to VirtualBox, not to powertop.
>> the root cause is virtualbox doesn't pass the battery info from host to
>> guest.
>> you can confirm it in the acpi table on the guest.
>>
>
> What does the kstat report if the ACPI table isn't present? ...or does the
> kstat not get created?
>
battery in kstat will be created, but the kstat member depends on what BIOS
exports to OS. if battery is not present, the battery control method
in ACPI will
tell us, like this one, even doesn't have BIF object.

Thanks,
-Aubrey

> module: battery                         instance: 0
> name:   battery warning                 class:    misc
>        crtime                          47.413763103
>        enabled                         0
>        low capacity threshold          0
>        snaptime                        2215.84236619
>        warn capacity threshold         0
>
> module: battery                         instance: 0
> name:   power                           class:    misc
>        crtime                          47.413758137
>        snaptime                        2215.842849596
>        supported_battery_count         0
>        system power                    AC