From mboxrd@z Thu Jan 1 00:00:00 1970 From: joeyli Subject: Re: Fwd: Brightness on HP EliteBook 8460p Date: Wed, 21 Dec 2011 12:05:44 +0800 Message-ID: <1324440344.10394.444.camel@linux-s257.site> References: <3123346.jTQFjj4kVk@pali-elitebook> <1324223229.10394.39.camel@linux-s257.site> <1324368819.10394.335.camel@linux-s257.site> <1700296.GfeBjppFVA@pali-elitebook> <1324433810.10394.402.camel@linux-s257.site> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: Received: from victor.provo.novell.com ([137.65.250.26]:34361 "EHLO victor.provo.novell.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751715Ab1LUEJG (ORCPT ); Tue, 20 Dec 2011 23:09:06 -0500 In-Reply-To: <1324433810.10394.402.camel@linux-s257.site> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Pali =?ISO-8859-1?Q?Roh=E1r?= Cc: linux-acpi@vger.kernel.org, platform-driver-x86@vger.kernel.org =E6=96=BC =E4=B8=89=EF=BC=8C2011-12-21 =E6=96=BC 10:16 +0800=EF=BC=8Cjo= eyli =E6=8F=90=E5=88=B0=EF=BC=9A > =E6=96=BC =E4=BA=8C=EF=BC=8C2011-12-20 =E6=96=BC 14:20 +0100=EF=BC=8C= Pali Roh=C3=A1r =E6=8F=90=E5=88=B0=EF=BC=9A > > On Tuesday 20 December 2011 16:13:39 joeyli wrote: > > > > > >=20 > > > > > > adding any acpi_osi values did not changed anything (also t= ried > > > > > > 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= mode > > > > > > 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 n= ame > > > string, it's essentially obsolete. > > >=20 > > > Please add the following kernel parameter to /boot/grub/menu.lst: > > > acpi_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 > >=20 > > Hello, > >=20 > > I tried to add one of these acpi_os_name into grub kernel command l= ine: > >=20 > > 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" > >=20 > > but brightness control (via /sys/class/backlight/acpi_video0/bright= ness) did=20 > > not worked. > >=20 > > --=20 > > Pali Roh=C3=A1r > > pali.rohar@gmail.com >=20 > In DSDT, check the following 3 OS name strings, just need feed a stri= ng > not in list could be by-pass _OS check: >=20 > Name (OSID, Package (0x03) > { > "Microsoft Windows", > "Microsoft WindowsME: Millennium Edition", > "Microsoft Windows NT" /* match with Linux k= ernel's _OS name default define */ > }) >=20 > Unfortunately, just by-pass _OS check cann't fix your problem. I need > spend time to dig more detail in your DSDT. > Could you please attached your whole dmesg log that cover system boot > and press brightness control key a couple of times? >=20 >=20 > Thanks a lot! > Joey Lee Sorry! forgot say! could you please also enable the acpi debug messages in kernel parameter? Just need add the following kernel parameter to /boot/grub/menu.lst: acpi.debug_level=3D0x2 acpi.debug_layer=3D0xFFFFFFFF Please attached dmesg and messages log. Thanks a lot! Joey Lee -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html