From: David Brownell <david-b@pacbell.net>
To: linux-hotplug@vger.kernel.org
Subject: Re: [linux-usb-devel] [PATCH] fix some hubs and hid devices at startup
Date: Tue, 12 Mar 2002 00:20:30 +0000 [thread overview]
Message-ID: <marc-linux-hotplug-101589262901345@msgid-missing> (raw)
In-Reply-To: <marc-linux-hotplug-101588456410451@msgid-missing>
Johannes replied to Greg:
> > Since the latest USB patch went in that added a proper delay to the
> > hub connection sequence, a lot of people have been reporting odd
> > problems with some USB hubs, keyboards, and mice. I've seen this
> > problem too. It is usually fixed by just replugging the device in, but
> > not all of the time.
>
> .... deleted patch (adds delay in userland) and comments ....
>
> Is it that devices don't like how quickly we let the driver talk to it
> after enumeration?
I'm likewise puzzled by this. Were these devices that worked
previously? If so it'd seem to be the kernel "delay" patch
that's at fault somehow. And if not, it'd seem like that "delay"
patch doesn't work quite well enough on those devices (which
might be more marginal than it seems at first).
It doesn't make sense to me that if more delays are added in
the kernel code, userland needs to see even more.
- Dave
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next prev parent reply other threads:[~2002-03-12 0:20 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-03-11 22:08 [linux-usb-devel] [PATCH] fix some hubs and hid devices at startup Johannes Erdfelt
2002-03-12 0:20 ` David Brownell [this message]
2002-03-12 20:27 ` Greg KH
2002-03-12 20:29 ` Greg KH
2002-03-12 22:15 ` David Brownell
2002-03-12 22:52 ` Greg KH
2002-03-13 1:52 ` David Brownell
2002-03-14 13:21 ` Olaf Hering
2002-03-15 18:28 ` Greg KH
2002-05-15 20:25 ` David Brownell
2002-05-15 20:37 ` Olaf Hering
2002-05-15 21:37 ` Johannes Erdfelt
-- strict thread matches above, loose matches on Subject: below --
2002-05-15 20:08 Olaf Hering
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