linux-kernel - Re: 2.6.19-rc <-> ThinkPads

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <200611010611.30445.earny@net4u.de>
Date:	Wed, 1 Nov 2006 06:11:27 +0100
From:	Ernst Herzberg <earny@...4u.de>
To:	Len Brown <lenb@...nel.org>
Cc:	Adrian Bunk <bunk@...sta.de>, Hugh Dickins <hugh@...itas.com>,
	"Michael S. Tsirkin" <mst@...lanox.co.il>,
	Pavel Machek <pavel@...e.cz>,
	Linus Torvalds <torvalds@...l.org>,
	Andrew Morton <akpm@...l.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	linux-acpi@...r.kernel.org, linux-pm@...l.org,
	Martin Lorenz <martin@...enz.eu.org>
Subject: Re: 2.6.19-rc <-> ThinkPads

On Wednesday 01 November 2006 04:15, Len Brown wrote:
> The BIOS disables the LAPIC for a reason.
> A couple of years ago Linux made the mistake of enabling the LAPIC
> that the BIOS disabled, and all hell broke loose.
> We fixed that bug about a year ago, but left "lapic"
> to force it on for those where forcing it to be enabled actually
> works (eg. some folks want the NMI profiling on their IOAPIC-less  laptop)
>
> But if you force the lapic to be enabled, you are running the system
> in a mode not supported by the manufacturer and you are on your own.
>
> I don't see an indication that this is a bug.
> If it used to work and it is important to you,
>  then run the old software where it used to work --
> because chances are good that it worked by accident.

Maybe. But why does it boot with AC connected and lapic enabled, bot not if AC 
is disconnected and lapic enabled? If have no problem to run this laptop 
without lapic, i don't relly need it. But i wondering that this happens only 
if the machine runs (by accident:) on battery.

still bisecting, will report the result.

<earny>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/