Date: Sat, 3 Apr 2010 16:19:11 GMT From: Dan Lukes <dan@obluda.cz> To: freebsd-acpi@FreeBSD.org Subject: Re: kern/145306: [acpi]: Can't change brightness on HP ProBook 4510s Message-ID: <201004031619.o33GJBHd043318@freefall.freebsd.org>
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The following reply was made to PR kern/145306; it has been noted by GNATS. From: Dan Lukes <dan@obluda.cz> To: bug-followup@FreeBSD.org, demelier.david@gmail.com Cc: Subject: Re: kern/145306: [acpi]: Can't change brightness on HP ProBook 4510s Date: Sat, 03 Apr 2010 10:12:27 +0200 The brightness change part of acpi-video is based on ACPI specification 4.0 paragpraph B.7 Maybe the notebook doesn't support it. The acpidump -dt may help. Also, it's necesarry to compile kernel with ACPI_DEBUG, then setup debug messages in loadr.conf, then check the BIOS will generate the required notifications. Dan
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