Re: kern/145306: [acpi]: Can't change brightness on HP ProBook 4510s

[re...@freebsd.org]

Old Synopsis: Can't change brightness on HP ProBook 4510s
New Synopsis: [acpi]: Can't change brightness on HP ProBook 4510s

Responsible-Changed-From-To: freebsd-i386->freebsd-acpi
Responsible-Changed-By: remko
Responsible-Changed-When: Sat Apr 3 07:41:51 UTC 2010
Responsible-Changed-Why:
Assign to ACPI team.

http://www.freebsd.org/cgi/query-pr.cgi?pr=145306

[Dan Lukes]

The following reply was made to PR kern/145306; it has been noted by GNATS.

From: Dan Lukes <d...@obluda.cz>
To: bug-fo...@FreeBSD.org, demelie...@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

[Dan Lukes]

The following reply was made to PR kern/145306; it has been noted by GNATS.

From: Dan Lukes <d...@obluda.cz>
To: David DEMELIER <demelie...@gmail.com>, bug-fo...@FreeBSD.org
Cc:
Subject: Re: kern/145306: [acpi]: Can't change brightness on HP ProBook 4510s

Date: Mon, 05 Apr 2010 19:20:01 +0200

Short summary for PR/145306:

I asked the David to turn on ACPI debugging. There are some notification
(so we know we got debugging output properly) but none of them are
related to brightness keys.

David DEMELIER wrote:
>>> I added them and I got a big output in dmesg but still no message when pressing fn-keys.
> No message at all, like I didn't do anything

Then no good news. I can't help you. Your BIOS doesn't create the
notification required by ACPI specification section B.7

Your's acpidump show that the notification may be sent, but we know the
prerequisites that's need to be fulfilled. It may be a initialisation of
something or so.

If you have older than lates version of system BIOS (e.g. F.12 revision)
the upgrade may help:
http://h20000.www2.hp.com/bizsupport/TechSupport/SoftwareIndex.jsp?lang=en&cc=us&prodNameId=3934829&prodTypeId=321957&prodSeriesId=3934828&swLang=13&taskId=135&swEnvOID=4056#120

May be someone smarter may help better to you. You should save output of:
1. acpidump -dt
2. devinfo -vr
3. dmesg after boot with ACPI debugging turned on

somewhere then send URL to the PR so anyone can read it.

I'm sorry I have no better response to you ...

Dan