https://bugzilla.kernel.org/show_bug.cgi?id=176451

--- Comment #4 from [email protected] ---
Here's a BAT0 available/missing feature matrix (from memory, don't have
computer at hand to test right now):

           |  boot with: acpi_osi unset   | acpi_osi=Linux | acpi_osi=Darwin
-------------------------------------------------------------------------------
4.6        | BAT0                         | BAT0           | BAT0
4.7        | no BAT0 (defaults to Darwin) | BAT0           | no BAT0
4.8-rc8    | no BAT0 (defaults to Darwin) | BAT0           | no BAT0


Please also note the secondary problem: upowerd getting confused by ADP1 uevent
coming in and BAT0/status updating seconds later (thus new BAT0/status is
missed by upowerd when re-reading the current state). This problem is somehow
gone on 4.8-rc8 with acpi_osi=Linux where upowerd keeps battery state in sync
with reality when pluggin/unplugging power cable. The upowerd getting confused
problem did not exist about 1 year ago.

The winning configuration for me where I get rid of both problems is thus:
4.8-rc8 booted with acpi_osi=Linux

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