From: Vojtech Pavlik <vojtech@suse.cz>
To: Stefan Smietanowski <stesmi@stesmi.com>
Cc: Dmitry Torokhov <dtor_core@ameritech.net>,
torvalds@osdl.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 24/44] Workaround i8042 chips with broken MUX mode
Date: Fri, 19 Mar 2004 15:30:14 +0100 [thread overview]
Message-ID: <20040319143014.GA749@ucw.cz> (raw)
In-Reply-To: <405B01E7.5000809@stesmi.com>
On Fri, Mar 19, 2004 at 03:21:27PM +0100, Stefan Smietanowski wrote:
> Hi.
>
> >So far on every machine I've got a report from it was caused by BIOS
> >emulation of PS/2 mouse using an USB mouse (even when USB mouse wasn't
> >present). Compiling the USB modules into the kernel fixes the problem.
>
> Could this have anything to do with the fact that my x86-64 kernel nukes
> on startup if USB keyboard/mouse emul is enabled in the BIOS?
Yes, and no. USB keyboard/mouse emulation is simply broken in most
BIOSes. It's even more broken on AMD64 BIOSes, because usually noone
tests its interaction with 64-bit longmode. And thus when it is invoked
in 64-bit longmode, it crashes the machine.
On x86 it just causes problems with PS/2 mouse and keyboard.
So it's caused by the same thing, but these are two different problems.
> This is on an ASUS K8T800 and an MSI K8T800 board.
>
> If you don't know what I'm talking about I'll give more info of course.
--
Vojtech Pavlik
SuSE Labs, SuSE CR
next prev parent reply other threads:[~2004-03-19 14:29 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-03-16 18:24 [PATCH 24/44] Workaround i8042 chips with broken MUX mode Dmitry Torokhov
2004-03-18 20:37 ` Vojtech Pavlik
[not found] ` <200403190005.36956.dtor_core@ameritech.net>
2004-03-19 13:58 ` Vojtech Pavlik
2004-03-19 14:21 ` Stefan Smietanowski
2004-03-19 14:30 ` Vojtech Pavlik [this message]
2004-03-19 13:56 ` Vojtech Pavlik
2004-03-28 0:29 ` Andries Brouwer
2004-03-28 0:40 ` Dmitry Torokhov
2004-03-28 1:25 ` Andries Brouwer
2004-03-28 3:11 ` Dmitry Torokhov
2004-03-28 7:45 ` Stefan Smietanowski
-- strict thread matches above, loose matches on Subject: below --
2004-03-16 14:19 [PATCH 23/44] Use __obsolete_setup() in input drivers to warn about obsolete kernel params Vojtech Pavlik
2004-03-16 14:19 ` [PATCH 24/44] Workaround i8042 chips with broken MUX mode Vojtech Pavlik
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