From mboxrd@z Thu Jan 1 00:00:00 1970 From: Len Brown Subject: Re: Blacklisted system / blacklisting bad Date: Wed, 20 Sep 2006 00:55:42 -0400 Message-ID: <200609200055.42958.len.brown@intel.com> References: <200609031134.33024.dieter.jurzitza@t-online.de> Reply-To: Len Brown Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Return-path: Received: from hera.kernel.org ([140.211.167.34]:23244 "EHLO hera.kernel.org") by vger.kernel.org with ESMTP id S1751165AbWITExy (ORCPT ); Wed, 20 Sep 2006 00:53:54 -0400 In-Reply-To: <200609031134.33024.dieter.jurzitza@t-online.de> Content-Disposition: inline Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Dieter Jurzitza Cc: Linux ACPI On Sunday 03 September 2006 05:34, Dieter Jurzitza wrote: > I recently got a HP VISUALIZE NT workstation, using 2x 1GHz PIII processors >. After installation ACPI was always disabled, the on board USB interface did not work >(kernel 2.6.11.4 (SuSE linux 9.3) > > I tested using acpi=force on the commandline and that solved two problems: > > 1.) shutdown -h now switches the machine off (should be expected :-):-) ) > 2.) much more important: the onboard USB interface works now. > > After patching dmi_scan.c and removing the blacklist-entry I get the following > message at boot time: .... ACPI is necessary to get the interrupts right for USB to work on this box. pci=noacpi and acpi=ht will cause ACPI to be disabled for interrupt routing and thus USB will fail with those. As Luming pointed out, Shaohua's _CRS workaround for the _BBN BIOS bug is what your system needed, and that is why "acpi=force" is working. It seems that perhaps the DMI blacklist entry pre-dated that workaround. Please verify that 2.6.18-rc7 works with "acpi=force" on this box, and if it does, please send me a patch to remove the entry in that kernel. thanks, -Len