From: Len Brown Subject: Re: 2.6.19-rc4: known unfixed regressions (v3) Date: Tue, 7 Nov 2006 00:41:24 -0500 Message-ID: <200611070041.28008.len.brown@intel.com> References: <20061105064801.GV13381@stusta.de> <200611070317.42230.earny@net4u.de> Reply-To: Len Brown Mime-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Cc: Andrew Morton , jgarzik@pobox.com, Thierry Vignaud , discuss@x86-64.org, Ernst Herzberg , Linux Kernel Mailing List , Alex Romosan , openib-general@openib.org, Christian , linux-ide@vger.kernel.org, Linus Torvalds , oprofile-list@lists.sourceforge.net, Jens Axboe , Martin Lorenz , "Bryan O'Sullivan" , Elimar Riesebieter , linux-pm@osdl.org, Komuro , Jeff Chua , phil.el@wanadoo.fr, gregkh@suse.de, ak@suse.de, Adrian Bunk , linux-acpi@vger.kernel.org, mingo@redhat.com, nfs@lists.sourceforge.net, "Eric W. Biederman" , cpufreq@l Return-path: To: linux-pm@lists.osdl.org In-Reply-To: <200611070317.42230.earny@net4u.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: linux-pm-bounces@lists.osdl.org Errors-To: linux-pm-bounces@lists.osdl.org List-ID: On Monday 06 November 2006 21:17, Ernst Herzberg wrote: > On Sunday 05 November 2006 07:48, Adrian Bunk wrote: > > ... > > Subject : ThinkPad R50p: boot fail with (lapic && on_battery) > > References : http://lkml.org/lkml/2006/10/31/333 > > Submitter : Ernst Herzberg > > Status : problem is being debugged > = > Update: > = > 2.6.19-rc4-git11 does _not_ fix the problem. > = > But now it doesn't matter if Cardbus/PCMCIA is compiled in or not. > = > What also matters is a setting in the BIOS: > = > If i set instead of > = > Power -> = > SpeedStep -> > Mode for AC - "Max Performance" > Mode for Battery "Max Battery" > = > to > = > Power -> = > SpeedStep -> > Mode for AC - "Max Battery" > Mode for Battery "Max Performance" = > = > he _does_ boot from battery but also on AC... so with the new settings it boots properly in either AC or battery mode wit= h forced "lapic"? Strange, one would expect this to refer to APM settings, but who knows... Please test if booting with "processor.max_cstate=3D1" makes any difference Please test if building with CONFIG_CPU_FREQ=3Dn makes any difference. Also, please make sure that booting with "apm=3Doff" makes no difference -- there is a bug where the APM code is not currently disabled in ACPI mode, and who knows what effect that may have... > Also the problem is now(?) not very reliable. Sometimes the boot is succe= ssful = > even on battery and then the laptop works without a glitch. > This makes it not easier to isolate the problem. > = > Is somewhere a howto-revert-patches-in-kernel-git-for-raw-beginners? Documentation/git-bisect.txt is what you want -- though if you can't reliably reproduce the failure it may not easily lead you to the failure. Also, it may be a good use of time to make darn sure that booting 2.6.18 with forced "lapic" when on battery does not fail. ie. is this really a regression -- of did forcing the lapic on this box never work reliably? -Len