Date: Tue, 30 Mar 2010 09:47:12 +0100 From: Rui Paulo <rpaulo@freebsd.org> To: Dan Lukes <dan@obluda.cz> Cc: freebsd-acpi@freebsd.org Subject: Re: Brightness change on notebook that follow ACPI specification (par. B.7) Message-ID: <8D820BAA-C1B9-408C-AAF3-EA69612D2C46@freebsd.org> In-Reply-To: <4BB170E7.3030407@obluda.cz> References: <4BB170E7.3030407@obluda.cz>
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On 30 Mar 2010, at 04:32, Dan Lukes wrote: > > Most notebooks have special keys (mostly Fn+something) to change brightness of LCD display. > > Some of them (my notebok, for example) follows the ACPI specification (paragraph B.7) how to announce the user request for brightness change to OS. > > I implemented such handling as part of acpi-video module. > > It's verified to work on my HP Mini 5101 & FreeBSD 8.0. > > No test on other notebook done as I have no other notebook. > > No test on other OS version, but verified that patched module can be compiled on 6.4-R, 7.2-R, 8.0-R. I assume (not verified) it's compilable on all 6.x-8.x. I assume (not verified) it should work on all of these versions. > > If someone want to test it then the patch is here: > http://www.freebsd.cz/~dan/patch-acpi-video > > installation: > cd /usr/src ; patch < patch-acpi-video > then compile the module: > http://www.freebsd.org/doc/handbook/acpi-debug.html#ACPI-DEBUGOUTPUT > then kldload acpi_video > then try keys for brightness change. > > I'm interested to know on which notebook and FreeBSD version is verified to be (not)working. > > If it doesn't work it may be either: > 1. bug in my patch > 2. your notebook doesn't follow ACPI specification (par. B.7) > > If you are skilled user and you want to know more (and you have compiled ACPI modules with ACPI_DEBUG) you can set > debug.acpi.level="ACPI_LV_ALL_EXCEPTIONS" > then look on console messages what happens when you press the special keys. > > Dan I see nothing wrong with this patch and I think it can be committed, but I would like others to take a look. -- Rui Paulo
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