Hi Ethan,
Zitat von "Ethan W. House" <eho...@csh.rit.edu>:
What could be causing my brightness control to not work on my Intel
graphics card. The acpi values change but no effect takes place.
ehouse@derpy ~ $ sudo sysctl hw.acpi.video.lcd0.brightness=50
hw.acpi.video.lcd0.brightness: 100 -> 50
ehouse@derpy ~ $ sudo sysctl hw.acpi.video.lcd0.active=1
hw.acpi.video.lcd0.active: 0 -> 0
I also have an issue were upon resume by machine reboots. I believe the two
might be related but I am not sure.
I found a couple of other email chains with similar issues but most of them
have been inactive for more then a year.
Which Laptop model do you have? This issue appears a bit familiar to
me[1] - I have the same on my Thinkpad. As a workaround you could try
to change the brightness by direct ACPI calls.
Preparation:
* install sysutils/acpi_call
* kldload acpi_call
Change brightness:
* acpi_call -p '\VBRU' (Brightness Up)
* acpi_call -p '\VBRD' (Brightness Down)
It might be that these calls are specific to Thinkpads, not sure if
they work with others. You can try to find out with acpidump[1].
Kind regards,
Matthias
[1] http://www.freebsd.org/cgi/query-pr.cgi?pr=amd64/181357
[2] http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/acpi-debug.html
--
Matthias Petermann <matth...@petermann-it.de>
Ihr Partner für anspruchsvolle IT-Lösungen
www.petermann-it.de - lösungsorientiert, innovativ und erfolgreich
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