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From: Pavel Machek <pavel@suse.cz>
To: Dmitry Torokhov <dtor_core@ameritech.net>
Cc: Vojtech Pavlik <vojtech@suse.cz>, LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH 0/8] New set of input patches
Date: Fri, 9 Jul 2004 07:06:18 +0200	[thread overview]
Message-ID: <20040709050618.GA23152@elf.ucw.cz> (raw)
In-Reply-To: <200407082248.28835.dtor_core@ameritech.net>

Hi!

> > > 03-i8042-broken-mux-workaround.patch
> > > 	- Some MUXes get confused what AUX port the byte came from. Assume
> > > 	  that is came from the same port previous byte came from if it
> > > 	  arrived within HZ/10
> > 
> > Does that mean that (even if my hw is ok) when I two mice at once
> > I get random movements?
> 
> No, that code will only kick in if your MUX gets confused and not during
> normal course of operation. Some MUXes, when confused, raise MUXERR flag
> but leave the data byte intact in violation of active multiplexing spec.
> which says that with MUXERR the only valid data bytes are 0xfd, oxfe and
> 0xff (to signal timeout, resend or parity error). So if we get something
> other than 0xfd, 0xfe or 0xff within HZ/10 of last successfully transmitted
> byte we assume that MUX got confused and the byte was sent by the same
> device that transmitted the previous byte.
> 
> Does it make any sense?

Yes... Hmm, it is wonderfull in how many ways hardware can be
broken...

								Pavel

-- 
People were complaining that M$ turns users into beta-testers...
...jr ghea gurz vagb qrirybcref, naq gurl frrz gb yvxr vg gung jnl!

      reply	other threads:[~2004-07-09  5:06 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2004-07-08  6:55 [PATCH 0/8] New set of input patches Dmitry Torokhov
2004-07-08  6:55 ` [PATCH 1/8] " Dmitry Torokhov
2004-07-08  6:56   ` [PATCH 2/8] " Dmitry Torokhov
2004-07-08  6:56     ` [PATCH 3/8] " Dmitry Torokhov
2004-07-08  6:57       ` [PATCH 4/8] " Dmitry Torokhov
2004-07-08  6:57         ` [PATCH 5/8] " Dmitry Torokhov
2004-07-08  6:58           ` [PATCH 6/8] " Dmitry Torokhov
2004-07-08  6:58             ` [PATCH 7/8] " Dmitry Torokhov
2004-07-08  6:59               ` [PATCH 8/8] " Dmitry Torokhov
2004-07-12  3:17   ` synaptics driver Ari Pollak
2004-07-12  3:41     ` Dmitry Torokhov
2004-07-08 20:32 ` [PATCH 0/8] New set of input patches Pavel Machek
2004-07-09  3:48   ` Dmitry Torokhov
2004-07-09  5:06     ` Pavel Machek [this message]

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