linux-kernel - Re: USB disconnects every 30 seconds (2.6.27-rc8)

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Date:	Sat, 4 Oct 2008 14:12:52 -0400 (EDT)
From:	Alan Stern <stern@...land.harvard.edu>
To:	Dave Hansen <dave@...1.net>
cc:	Thomas Gleixner <tglx@...utronix.de>, gregkh <gregkh@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	USB list <linux-usb@...r.kernel.org>
Subject: Re: USB disconnects every 30 seconds (2.6.27-rc8)

On Fri, 3 Oct 2008, Dave Hansen wrote:

> OK, here's output with both Thomas/Hugh's timing fix as well as the USB
> snooping turned on.  The disconnects still happen, but I did get some
> good snoop output:
> 
> Oct  3 16:01:59 nimitz kernel: [  180.273883] usb usb7: opened by process 6485: hald-addon-usb-
> Oct  3 16:01:59 nimitz kernel: [  180.273894] usb usb7: usbdev_ioctl: CONNECTINFO
> Oct  3 16:01:59 nimitz kernel: [  180.273935] usb usb7: opened by process 6485: hald-addon-usb-
> 
> grepping for hald:
> dave@...itz:~$ ps aux | grep hald
> 111       6407  0.5  0.1   6340  4352 ?        Ss   15:59   0:00 /usr/sbin/hald
> root      6411  0.0  0.0   3348  1152 ?        S    15:59   0:00 hald-runner
> root      6485  0.1  0.0   2996  1140 ?        S    15:59   0:00 hald-addon-usb-csr: listening on 'MX700 Optical Mouse'
> ...
> 
> If I kill off 'hald-addon-usb-csr', then the resets stop happening.
> Restart hal, and they come back.  

There's probably a setting for hal which will prevent this constant 
probing.

> Oct  3 16:01:59 nimitz kernel: [  180.273883] usb usb7: opened by process 6485: hald-addon-usb-
> Oct  3 16:01:59 nimitz kernel: [  180.273894] usb usb7: usbdev_ioctl: CONNECTINFO
> Oct  3 16:01:59 nimitz kernel: [  180.273935] usb usb7: opened by process 6485: hald-addon-usb-
> Oct  3 16:01:59 nimitz kernel: [  180.273940] usb usb7: usbdev_ioctl: IOCTL
> Oct  3 16:01:59 nimitz kernel: [  180.392126] usb 3-4: opened by process 6485: hald-addon-usb-
> Oct  3 16:01:59 nimitz kernel: [  180.393185] usb 3-4.3: USB disconnect, address 16
> Oct  3 16:01:59 nimitz kernel: [  180.393191] usb 3-4.3.4: USB disconnect, address 17
> Oct  3 16:01:59 nimitz kernel: [  180.437913] usb 3-4.3: new high speed USB device using ehci_hcd and address 18
> Oct  3 16:01:59 nimitz kernel: [  180.494705] usb 3-4.3: configuration #1 chosen from 1 choice
> Oct  3 16:01:59 nimitz kernel: [  180.495101] hub 3-4.3:1.0: USB hub found
> Oct  3 16:01:59 nimitz kernel: [  180.495409] hub 3-4.3:1.0: 4 ports detected
> Oct  3 16:01:59 nimitz kernel: [  180.600101] usb 3-4: usbdev_ioctl: CONNECTINFO
> Oct  3 16:01:59 nimitz kernel: [  180.600144] usb usb3: opened by process 6485: hald-addon-usb-
> Oct  3 16:01:59 nimitz kernel: [  180.600147] usb usb3: usbdev_ioctl: CONNECTINFO
> Oct  3 16:01:59 nimitz kernel: [  180.600167] usb 3-4: opened by process 6485: hald-addon-usb-
> Oct  3 16:01:59 nimitz kernel: [  180.600170] usb 3-4: usbdev_ioctl: IOCTL

Without a usbmon log, I can't tell what may still be going wrong.

Alan Stern

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