From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Josua Dietze <digidietze@draisberghof.de>
Cc: Greg KH <greg@kroah.com>, Alan Stern <stern@rowland.harvard.edu>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
Hugh Blemings <hugh@blemings.org>
Subject: Re: USB serial regression 2.6.31.1 -> 2.6.31.2
Date: Sat, 10 Oct 2009 18:41:01 +1100 [thread overview]
Message-ID: <1255160461.3387.4.camel@pasglop> (raw)
In-Reply-To: <4AD03A03.5050702@draisberghof.de>
On Sat, 2009-10-10 at 09:38 +0200, Josua Dietze wrote:
> Benjamin Herrenschmidt schrieb:
>
>
> > The symptom is that the USB modem just disconnects/reconnects in a loop.
> > The log looks like what I pasted below when plugging the device (and
> > leaving it in, the disconnects don't correspond to the device being
> > removed).
>
>
> This is one of the mode switching devices. It is switched to modem
> mode by "usb_stor_huawei_e220_init".
>
> Something keeps resetting it to initial mode. It might be a
> powersave/suspend issue.
suspend is a good candidate yeah, autosuspend might be causing something
like that, I'll see what I can find. I didn't spot an obvious change to
the USB suspend policy between those two kernels, but it could be
trigged by one of the numerous changes that went into usb-serial.
Cheers,
Ben.
next prev parent reply other threads:[~2009-10-10 8:04 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-10-10 0:25 USB serial regression 2.6.31.1 -> 2.6.31.2 Benjamin Herrenschmidt
2009-10-10 0:31 ` USB serial regression 2.6.31.1 -> 2.6.31.2 (and 2.6.32-rc3) Benjamin Herrenschmidt
2009-10-10 0:32 ` Benjamin Herrenschmidt
2009-10-10 1:56 ` Alan Stern
2009-10-10 2:03 ` Alan Stern
2009-10-10 2:48 ` Benjamin Herrenschmidt
2009-10-10 3:11 ` Benjamin Herrenschmidt
2009-10-10 16:20 ` Alan Stern
2009-10-10 2:45 ` Benjamin Herrenschmidt
2009-10-10 7:38 ` USB serial regression 2.6.31.1 -> 2.6.31.2 Josua Dietze
2009-10-10 7:41 ` Benjamin Herrenschmidt [this message]
2009-10-10 9:55 ` Oliver Neukum
2009-10-10 15:05 ` Greg KH
2009-10-10 17:05 ` Alan Stern
2009-10-10 17:43 ` Ondrej Zary
2009-10-10 20:41 ` Alan Stern
2009-10-10 21:20 ` Benjamin Herrenschmidt
2009-10-10 22:17 ` Benjamin Herrenschmidt
2009-10-11 14:45 ` Alan Stern
2009-10-10 21:18 ` Benjamin Herrenschmidt
2009-10-10 21:56 ` Benjamin Herrenschmidt
2009-10-10 22:52 ` Alan Stern
2009-10-10 23:26 ` Benjamin Herrenschmidt
2009-10-10 23:47 ` Benjamin Herrenschmidt
[not found] <11818577.563251255220394815.JavaMail.root@mail.pc-doctor.com>
2009-10-11 0:21 ` Ben Efros
2009-10-11 5:24 ` Benjamin Herrenschmidt
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