Module Name: src
Committed By: martin
Date: Thu Jan 20 11:42:22 UTC 2022
Modified Files:
src/sys/dev/acpi [netbsd-9]: acpi_display.c
Log Message:
Pull up following revision(s) (requested by riastradh in ticket #1399):
sys/dev/acpi/acpi_display.c: revision 1.21
acpiout(4): Work around firmware that doesn't like some brightnesses.
Instead of just asking for cur - 5 or cur + 5, repeatedly ask for
that increment, check whether we actually made progress in that
direction, and if not keep going with another increment, until we hit
the bounds of brightness levels.
I can't find anything in the ACPI spec about this, but my laptop
seems to have trouble with certain levels: 15, 75, 85, 95. It goes
in all other increments of 5 from 5 to 100, just not those ones --
acts as if the change just never happened, so with the old logic the
brightness up/down would get stuck unable to move in either
direction.
This should have no impact on machines where the first increment
actually takes.
To generate a diff of this commit:
cvs rdiff -u -r1.16.16.2 -r1.16.16.3 src/sys/dev/acpi/acpi_display.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
