From: "Dmitry Torokhov" <dmitry.torokhov@gmail.com>
To: Alan Stern <stern@rowland.harvard.edu>
Cc: linux-input@atrey.karlin.mff.cuni.cz,
Jiri Kosina <jkosina@suse.cz>, Claas Langbehn <claas@rootdir.de>
Subject: Re: [Linux-usb-users] reset low speed USB device using uhci_hcd (fwd)
Date: Fri, 16 Mar 2007 10:06:24 -0400 [thread overview]
Message-ID: <d120d5000703160706p67f51d31i5312df2de3c1a3cc@mail.gmail.com> (raw)
In-Reply-To: <Pine.LNX.4.44L0.0703160953100.3349-100000@iolanthe.rowland.org>
On 3/16/07, Alan Stern <stern@rowland.harvard.edu> wrote:
> Take a look at the message below. It turned out that the USB errors went
> away when Claas removed a USB extension cable, but that doesn't explain
> the peculiar keyboard-mouse interaction -- especially since it's a PS/2
> keyboard. Any ideas?
>
Going on a limb here - faulty USB cable causes USB resets which throws
off legacy emulation (which is done in SMM as well as KBC controller)
which causes KCB to lose bytes. I would expect also seeing some
keypresses not being registered but losing release is much more
visible...
--
Dmitry
next prev parent reply other threads:[~2007-03-16 14:06 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-16 13:56 [Linux-usb-users] reset low speed USB device using uhci_hcd (fwd) Alan Stern
2007-03-16 14:06 ` Dmitry Torokhov [this message]
2007-03-16 14:17 ` Alan Stern
2007-03-16 14:28 ` Claas Langbehn
2007-03-16 15:10 ` Alan Stern
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