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Old 10-21-2012, 01:02 AM   #1
flyer103
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Registered: Mar 2010
Location: Beijing, China
Distribution: Slackware
Posts: 41

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hub 2-1:1.0: unable to enumerate USB device on port 5


Recently, I always find the following messages when starting Slackware14.0:

Code:
Oct 21 13:16:11 flyer kernel: [   20.602684] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   20.858425] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   21.114419] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   21.370122] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   21.626009] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   21.881843] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   22.137731] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   22.393878] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   22.649585] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   22.905344] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   23.161354] hub 2-1:1.0: unable to enumerate USB device on port 5
Oct 21 13:16:11 flyer kernel: [   23.417222] hub 2-1:1.0: unable to enumerate USB device on port 5

Oct 21 13:24:14 flyer kernel: [  769.397952] hub 2-1:1.0: connect-debounce failed, port 5 disabled
Oct 21 13:24:16 flyer kernel: [  771.189145] hub 2-1:1.0: connect-debounce failed, port 5 disabled
Oct 21 13:24:18 flyer kernel: [  772.980213] hub 2-1:1.0: connect-debounce failed, port 5 disabled
Oct 21 13:24:20 flyer kernel: [  774.771282] hub 2-1:1.0: connect-debounce failed, port 5 disabled
Oct 21 13:24:22 flyer kernel: [  776.562352] hub 2-1:1.0: connect-debounce failed, port 5 disabled
Oct 21 13:24:23 flyer kernel: [  778.353545] hub 2-1:1.0: connect-debounce failed, port 5 disabled
Oct 21 13:24:25 flyer kernel: [  780.144455] hub 2-1:1.0: connect-debounce failed, port 5 disabled
These will be displayed a lot of times when starting. I searched for solving this problem, but there were no proper solutions.

Is it caused by the kernel bug or my device?
 
Old 10-22-2012, 05:14 AM   #2
elesmod
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Registered: Sep 2012
Distribution: Slackware
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Maybe check a live distro and see if it also prints those messages. Not long ago I've had a problem with similar USB messages; Windows on the same machine said that one of my USB devices weren't working properly, which meant a hardware issue. Turned out the issue was just dust in my card reader.
 
1 members found this post helpful.
Old 10-23-2012, 12:12 AM   #3
flyer103
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Registered: Mar 2010
Location: Beijing, China
Distribution: Slackware
Posts: 41

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Thank you very much. I will give it a try.
 
  


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