https://bugzilla.kernel.org/show_bug.cgi?id=187811
Bug ID: 187811
Summary: Unjustified _BQC initial brightness warning
Product: ACPI
Version: 2.5
Kernel Version: 4.9-rc5
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: low
Priority: P1
Component: Power-Video
Assignee: [email protected]
Reporter: [email protected]
Regression: No
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/drivers/acpi/scan.c#n1117
Latest acpi spec explicitly states it's optional, so if my laptop lacks it I
don't see what's the problem.
...While we are at it then, there's a great talking lately about
dissimilarities between Windows and Linux acpi handling.
Did somebody check if even brightness control behavior matches?
https://msdn.microsoft.com/en-us/library/windows/hardware/ff569755.aspx
Because I know lots of cases of people (including me) with oddities and
inconsistencies with backlight/brightness control.
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