From: Stanislaw Gruszka <sgruszka@redhat.com>
To: "Ozan Çağlayan" <ozan@pardus.org.tr>
Cc: linux-wireless@vger.kernel.org, linville@tuxdriver.com,
ivdoorn@gmail.com, Johannes Stezenbach <js@sig21.net>,
Gertjan van Wingerde <gwingerde@gmail.com>
Subject: Re: Unplugging usb wlan (rt73usb) hangs the system
Date: Wed, 9 Mar 2011 11:06:56 +0100 [thread overview]
Message-ID: <20110309100651.GA23594@redhat.com> (raw)
In-Reply-To: <4D6E7B55.6010905@pardus.org.tr>
On Wed, Mar 02, 2011 at 07:16:05PM +0200, Ozan Çağlayan wrote:
> I have a bunch of different Edimax and Asus WLAN sticks that are working
> very well in Linux 2.6.37.2 with the rt73usb driver. But there's a
> really annoying problem which causes the system to hang upon unplugging
> those sticks.
>
> First X server goes. Then you can SSH into the machine for a while, and
> then I/O operations will start to fail. Magic SysRQ can be used to
> safely sync/unmount/reboot the system.
>
> It's happening very frequently but there are times that nothing bad happens.
>
> As far as I can tell, it happens much more frequently if you were
> associated to an AP when you unplugged the stick but let me clear this
> after testing plug/unplug without associating at all.
>
> One thing that is quite sure is that after unplugging the stick, if you
> do nothing with your keyboard, the problem seems not to appear, e.g. I'm
> moving the mouse cursor for a while, no problem at all but once I hit
> pageup/pagedown to browse on the current konsole screenbuffer, it hangs!
> So the problem seems to be triggered after keyboard interrupts.
>
> I've set up a netconsole connection and got the dmesg for a while.
> There's no oops/warning/error but every 2 minutes another tasks
> generates a stacktrace because of 120 seconds timeout. I'm attaching the
> log.
I can confirm problem exist in 2.6.37. I can not reproduce it in
current wireless-testing. I did not investigate further, I guess
issue is fixed by:
commit d7bb5f845f437662296adbfeaab8fbfce1c32289
Author: Johannes Stezenbach <js@sig21.net>
Date: Mon Dec 13 12:32:49 2010 +0100
rt2x00: fix hang when unplugging USB device in us
Stanislaw
next prev parent reply other threads:[~2011-03-09 10:08 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-02 17:16 Unplugging usb wlan (rt73usb) hangs the system Ozan Çağlayan
2011-03-09 10:06 ` Stanislaw Gruszka [this message]
2011-03-09 10:16 ` Ozan Çağlayan
2011-03-09 10:36 ` Stanislaw Gruszka
2011-03-11 9:18 ` Ozan Çağlayan
2011-03-11 10:21 ` Stanislaw Gruszka
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