From: Dmitry Torokhov <dmitry.torokhov@gmail.com>
To: Yao-Chung Chang <yaochung@cic.org.tw>
Cc: linux-input@vger.kernel.org
Subject: Re: about mouse lost synchronization
Date: Wed, 13 May 2009 19:56:09 -0700 [thread overview]
Message-ID: <20090514025609.GC9461@dtor-d630.eng.vmware.com> (raw)
In-Reply-To: <000001c9d39c$4baeb6f0$e30c24d0$@org.tw>
Hi,
On Wed, May 13, 2009 at 03:27:33PM +0800, Yao-Chung Chang wrote:
> Dear all
>
> I've implemented a ps/2 serio driver that uses GPIO (two GPIO pins). Each
>
> bit is triggered by GPIO interrupt. When in console mode, GPM works
>
> fine, and I can see the mouse cursor moves correctly. But When entering
>
> GUI, say QT or microwindows, the following messages occurred:
>
> Mouse at xxxxx/serio0/input0 lost synchronization, throwing 1 bytes away.
> ..
> Mouse at xxxxx/serio0/input0 lost synchronization, throwing 1 bytes away.
>
> Mouse at xxxxx/serio0/input0 lost synchronization, throwing 2 bytes away.
>
> And the mouse cursor is floating and moves incorrectly.
>
> What is the criteria that kernel think the mouse packet is lost of sync.?
>
When interrupts are delayed for too long the krenel thinks that it
missed a few bytes and complains.
--
Dmitry
prev parent reply other threads:[~2009-05-14 2:56 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-13 7:27 about mouse lost synchronization Yao-Chung Chang
2009-05-14 2:56 ` Dmitry Torokhov [this message]
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