From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pali =?ISO-8859-1?Q?Roh=E1r?= Subject: Re: Fwd: Brightness on HP EliteBook 8460p Date: Tue, 20 Dec 2011 14:20:43 +0100 Message-ID: <1700296.GfeBjppFVA@pali-elitebook> References: <3123346.jTQFjj4kVk@pali-elitebook> <1324223229.10394.39.camel@linux-s257.site> <1324368819.10394.335.camel@linux-s257.site> Mime-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart3691464.Q1MRl1VPVL"; micalg="pgp-sha1"; protocol="application/pgp-signature" Content-Transfer-Encoding: quoted-printable Return-path: In-Reply-To: <1324368819.10394.335.camel@linux-s257.site> Sender: platform-driver-x86-owner@vger.kernel.org To: joeyli Cc: linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org List-Id: linux-acpi@vger.kernel.org --nextPart3691464.Q1MRl1VPVL Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" On Tuesday 20 December 2011 16:13:39 joeyli wrote: > =E6=96=BC =E6=97=A5=EF=BC=8C2011-12-18 =E6=96=BC 23:47 +0800=EF=BC=8C= joeyli =E6=8F=90=E5=88=B0=EF=BC=9A >=20 > > Hi Pali, > >=20 > > =E6=96=BC =E6=97=A5=EF=BC=8C2011-12-18 =E6=96=BC 11:59 +0100=EF=BC=8C= Pali Roh=C3=A1r =E6=8F=90=E5=88=B0=EF=BC=9A > >=20 > > > On Friday 09 December 2011 16:46:29 Pali Roh=C3=A1r wrote: > > > > On Friday 09 December 2011 22:49:09 joeyli wrote: > > > > > Hi Pali, > > > > >=20 > > > > > =E6=96=BC =E4=BA=94=EF=BC=8C2011-12-09 =E6=96=BC 22:36 +0800=EF= =BC=8CLi Joey =E6=8F=90=E5=88=B0=EF=BC=9A > > > > >=20 > > > > > > ---------- Forwarded message ---------- > > > > > > From: Pali Roh=C3=A1r > > > > > > Date: 2011/7/15 > > > > > > Subject: Brightness on HP EliteBook 8460p > > > > > > To: linux-acpi@vger.kernel.org > > > > > >=20 > > > > > >=20 > > > > > > Hello, > > > > > >=20 > > > > > > on my HP EliteBook 8460p is not possible to set display > > > > > > brightness when ACPI > > > > > > is enabled in kernel. Entries in sysfs is properly > > > > > > created without errors. But > > > > > > when I try write any value > > > > > > to /sys/class/backlight/acpi_video0/brightness > > > > > > nothing happened (and no error is in dmesg). When I > > > > > > press Fn key for chaining > > > > > > display brightness kernel send correct key event (tested > > > > > > with xev) but > > > > > > nothing > > > > > > happened too. > > > > > >=20 > > > > > > When I disabled ACPI (acpi=3Doff in kernel command line) > > > > > > all Fn keys are > > > > > > broken > > > > > > and not working (no events in xev). But brightness keys > > > > > > working (I think on HW > > > > > > level, because xev does not see it) - increase and > > > > > > decrease display brightness. > > > > > >=20 > > > > > > So what can I do with my notebook? I think that there is > > > > > > error/bug in > > > > > > BIOS or > > > > > > ACPI because with disabled ACPI brightness working. But > > > > > > with > > > > > > disabled > > > > > > ACPI is > > > > > > notebook unuseable (no battery info, no Fn keys, no WIFI > > > > > > rfkill, > > > > > > ...). > > > > > > Can > > > > > > somebody help me with this problem? > > > > > >=20 > > > > > > -- > > > > > > Pali Roh=C3=A1r > > > > > > pali.rohar@gmail.com > > > > >=20 > > > > > You can try to put kernel parameter: > > > > > =09acpi_osi=3D"!Windows 2009" > > > > >=20 > > > > > to /boot/grub/menu.lst, then reboot look at maybe better. > > > > >=20 > > > > > And, > > > > > could you please kindly share DSDT and dmidecode to me? > > > > >=20 > > > > > Plesae login by root then: > > > > > =09% acpidump > acpidump.dat > > > > > =09% dmidecode > dmidecode.log > > > > >=20 > > > > > Thanks a lot! > > > > > Joey Lee > > > >=20 > > > > Hello, > > > >=20 > > > > adding any acpi_osi values did not changed anything (also tried= > > > > other osi strings from decompiled DSDT table). Brightness > > > > problem is in both BIOS and UEFI boot mode. > > > >=20 > > > > I attached acpidump and dmidecode output from bios and uefi mod= e > > > > too. > > >=20 > > > Did you find way how to control display brightness? > >=20 > > I am really sorry for I am sticking on another tough issue. > > I will look at your DSDT tomorrow. > >=20 > >=20 > > Thanks > > Joey Lee >=20 > I just look at the DSDT of HP EliteBook, this machine check _OS name > string, it's essentially obsolete. >=20 > Please add the following kernel parameter to /boot/grub/menu.lst: > =09acpi_os_name=3D"Windows 2009" >=20 > Let's by-pass the _OS name check first, hope it fix this issue. >=20 >=20 > Thanks > Joey Lee Hello, I tried to add one of these acpi_os_name into grub kernel command line:= acpi_os_name=3D"Windows 2009" acpi_os_name=3D"Windows 2006" acpi_os_name=3D"Windows 2001" acpi_os_name=3D"Windows 2001 SP1" acpi_os_name=3D"Windows 2001 SP2" but brightness control (via /sys/class/backlight/acpi_video0/brightness= ) did=20 not worked. --=20 Pali Roh=C3=A1r pali.rohar@gmail.com --nextPart3691464.Q1MRl1VPVL Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iEYEABECAAYFAk7wi6sACgkQi/DJPQPkQ1L+1gCfSfFFswPA1V/5A5V+oQNAuu7a PwcAnip4NRIxoY/KCqJX9tALvzq9J4mr =x5uk -----END PGP SIGNATURE----- --nextPart3691464.Q1MRl1VPVL--