linux-kernel - Re: 2.6.24: false double-clicks from USB mouse

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Date:	Sun, 2 Dec 2007 20:09:02 +0100 (CET)
From:	Jiri Kosina <jkosina@...e.cz>
To:	Mark Lord <lkml@....ca>
Cc:	Dmitry Torokhov <dmitry.torokhov@...il.com>,
	rubini@...ion.unipv.it, linux-input@...r.kernel.org,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	Jeff Garzik <jeff@...zik.org>
Subject: Re: 2.6.24:  false double-clicks from USB mouse

On Sun, 2 Dec 2007, Mark Lord wrote:

> > Here's a *single* button click (press/release quickly):
> > Event: time 1196621063.612542, type 1 (Key), code 272 (LeftBtn), value 1
> > Event: time 1196621063.612553, type 0 (Reset), code 0 (Reset), value 0
> > Event: time 1196621063.620504, type 1 (Key), code 272 (LeftBtn), value 0
> > Event: time 1196621063.620512, type 0 (Reset), code 0 (Reset), value 0
> > Event: time 1196621063.628497, type 1 (Key), code 272 (LeftBtn), value 1
> > Event: time 1196621063.628502, type 0 (Reset), code 0 (Reset), value 0
> > Event: time 1196621063.684524, type 1 (Key), code 272 (LeftBtn), value 0
> > Event: time 1196621063.684531, type 0 (Reset), code 0 (Reset), value 0
> > Event: time 1196621063.700532, type 1 (Key), code 272 (LeftBtn), value 1
> > Event: time 1196621063.700538, type 0 (Reset), code 0 (Reset), value 0
> > Event: time 1196621063.764540, type 1 (Key), code 272 (LeftBtn), value 0
> > Event: time 1196621063.764550, type 0 (Reset), code 0 (Reset), value 0
> ..

Thanks. This definitely is bogus. In fact three clicks are reported.

> Note that, much of the time, a single mouse click looks like this:
> Event: time 1196621357.073485, type 1 (Key), code 272 (LeftBtn), value 1
> Event: time 1196621357.073494, type 0 (Reset), code 0 (Reset), value 0
> Event: time 1196621357.201482, type 1 (Key), code 272 (LeftBtn), value 0
> Event: time 1196621357.201492, type 0 (Reset), code 0 (Reset), value 0

Yes, this is correct.

> This information may also be relevant:
> The mouse is plugged into a USB2 hub, and appears as IRQ19:
> 19:      34776          0   IO-APIC-fasteoi   uhci_hcd:usb1, ehci_hcd:usb5

Just a random shot into the dark -- if you remove the ehci-hcd module, 
does anything change?

Thanks,

-- 
Jiri Kosina
SUSE Labs
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