From mboxrd@z Thu Jan  1 00:00:00 1970
From: joeyli <jlee@suse.com>
Subject: Re: Fwd: [Bugreport] Screen backllight issues on FirePro M5950 (HP
 EliteBook 8560w)
Date: Wed, 25 Jan 2012 09:52:34 +0800
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To: Artur Flinta <aflinta@gmail.com>
Cc: linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org

=E6=96=BC =E4=BA=8C=EF=BC=8C2012-01-24 =E6=96=BC 16:25 +0100=EF=BC=8CAr=
tur Flinta =E6=8F=90=E5=88=B0=EF=BC=9A
> Hi!
>=20
> > Thanks, but looks like your kernel didn't enable
> >        CONFIG_ACPI_DEBUG=3Dy
> >
> > So, doesn't show up any acpi debug log in messages.
>=20
> Fixed, now using kernel-debug package ;) Quite huge in attachment.
>=20

I just found the _BCM in your SSDT3 table, I am tracing it:

            Method (_BCM, 1, Serialized)
            {
                Store (\_SB.BCM, Arg0)
                Local0
                If (Local0)
                {
                    Store (BRID, Local1)
                    If (LEqual (SBRV (), 0x00))
                    {
                        \_SB.SSMI (0xEA74, 0x04, Local1, 0x00, 0x00)
                    }

                    Signal (\_SB.BEVT)
                }
            }

> > Does it work set backlight level by sysfs?
> >        echo 9 > /sys/class/backlight/acpi_video0/brightness
>=20
> if kernel is booted with acpi_backlight=3Dvendor parameter, then ther=
e
> are no entries in  /sys/class/backlight directory.
>=20

OH! you are right, sorry I forgot it.


Thanks a lot!
Joey Lee

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