[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date: Sat, 10 Oct 2009 18:41:01 +1100
From: Benjamin Herrenschmidt <benh@...nel.crashing.org>
To: Josua Dietze <digidietze@...isberghof.de>
Cc: Greg KH <greg@...ah.com>, Alan Stern <stern@...land.harvard.edu>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
Hugh Blemings <hugh@...mings.org>
Subject: Re: USB serial regression 2.6.31.1 -> 2.6.31.2
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.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists