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Subject:	usb device "cannot reset port" error
From:	William Lutter <[log in to unmask]>
Reply To:	[log in to unmask]
Date:	Mon, 16 Apr 2012 10:37:53 -0500
Content-Type:	text/plain
Parts/Attachments:	text/plain (29 lines)

Friday, on a desktop running SL 6.1, I tried mounting an external USB hard drive and got hub port status errors.

External USB HD is a Cavalry CAXM3701T0 Series 1 TB USB 2.0 / eSATA device.  It worked fine with older linux SL (4.9) immediately after the SL6.0 error.  It has worked in past on SL5.3 SL5.7.  

It worked on SL6 (same machine a week earlier). I automounted it, unmounted it, added a line to fstab and mounted at /mnt/usbhd</x>.
/dev/sdb1               /mnt/usbhd</x>              ext3    noauto,user,rw  0 0

This time (on SL6.1) when I get the messages, I had the fstab line uncommented and would have mounted it at /mnt/usbhd</x> except I got the hub port messages below and sdb didn't show up at all via fdisk.
 
(from /var/log/messages)
Apr 13 12:55:08 mu2 kernel: usb 2-1.3: new high speed USB device using ehci_hcd and address 11
Apr 13 12:55:13 mu2 kernel: usb 2-1.3: device descriptor read/all, error -110
Apr 13 12:55:14 mu2 kernel: hub 2-1:1.0: cannot disable port 3 (err = -110)
...
Apr 13 12:55:31 mu2 kernel: hub 2-1:1.0: cannot reset port 3 (err = -110)
Apr 13 12:55:31 mu2 kernel: hub 2-1:1.0: Cannot enable port 3.  Maybe the USB cable is bad?
Apr 13 12:55:32 mu2 kernel: hub 2-1:1.0: cannot disable port 3 (err = -110)
Apr 13 12:55:32 mu2 kernel: hub 2-1:1.0: unable to enumerate USB device on port 3
Apr 13 12:55:33 mu2 kernel: hub 2-1:1.0: cannot disable port 3 (err = -110)
Apr 13 12:56:54 mu2 kernel: hub 2-1:1.0: hub_port_status failed (err = -110)
...
Apr 16 10:19:37 mu2 kernel: hub 2-1:1.0: hub_port_status failed (err = -110)
Apr 16 10:19:42 mu2 kernel: hub 2-1:1.0: hub_port_status failed (err = -110)
Apr 16 10:19:47 mu2 kernel: hub 2-1:1.0: hub_port_status failed (err = -110)

I've not had trouble with USB external hard drives before.  Any advice on how to get this working without having to reboot, which I've not tried yet.

Bill Lutter

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