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[Bug 1207409] Re: erro connecting more than 4 usb modems "parent hub has no TT"

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ygor bittencourt, thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command, as it will automatically gather debugging information, in a terminal:
apport-collect 1207409
When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

** Tags added: needs-kernel-logs needs-upstream-testing regression-
potential

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1207409

Title:
  erro connecting more than 4 usb modems "parent hub has no TT"

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Dear Srs,

  I need to connect multiple modems on the same machine but when connect more than 4 modems appears the following error "parent hub has no TT". I researched about it and saw some comments saying that this error was corrected in kernel 2.6.36.
   I always use the newest version of the kernel that is now "3.2.0-29-generic-pae # 46-Ubuntu SMP Fri Jul 27 17:25:43 UTC 2012 i686 i686 i386 GNU / Linux" but the error persists. My Ubuntu is 12.04 server,  i need help.

  
  # cat /var/log/kern.log |grep USB

  Jul 29 17:58:31  T1-server kernel: [609170.558212] ehci_hcd 0000:02:02.0: USB bus 1 deregistered
  Jul 29 18:03:06  T1-server kernel: [    1.384403] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
  Jul 29 18:03:06  T1-server kernel: [    1.385227] ehci_hcd 0000:02:02.0: new USB bus registered, assigned bus number 1
  Jul 29 18:03:06  T1-server kernel: [    1.430995] ehci_hcd 0000:02:02.0: USB 2.0 started, EHCI 1.00
  Jul 29 18:03:06  T1-server kernel: [    1.476203] hub 1-0:1.0: USB hub found
  Jul 29 18:03:06  T1-server kernel: [    1.476676] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
  Jul 29 18:03:06  T1-server kernel: [    1.476913] uhci_hcd: USB Universal Host Controller Interface driver
  Jul 29 18:03:06  T1-server kernel: [    1.477690] uhci_hcd 0000:02:00.0: new USB bus registered, assigned bus number 2
  Jul 29 18:03:06  T1-server kernel: [    1.478668] hub 2-0:1.0: USB hub found
  Jul 29 18:03:06  T1-server kernel: [    2.292074] usb 1-6: new high-speed USB device number 2 using ehci_hcd
  Jul 29 18:03:06  T1-server kernel: [    2.622252] hub 1-6:1.0: USB hub found
  Jul 29 18:04:00  T1-server kernel: [   57.588526] usb 1-1: new high-speed USB device number 3 using ehci_hcd
  Jul 29 18:04:01  T1-server kernel: [   58.312284] Initializing USB Mass Storage driver...
  Jul 29 18:04:01  T1-server kernel: [   58.312456] USB Mass Storage support registered.
  Jul 29 18:04:02  T1-server kernel: [   59.324587] scsi 3:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 29 18:04:05  T1-server kernel: [   62.613166] usb 1-1: USB disconnect, device number 3
  Jul 29 18:04:06  T1-server kernel: [   63.149032] usb 1-2: new high-speed USB device number 4 using ehci_hcd
  Jul 29 18:04:06  T1-server kernel: [   63.559088] USB Serial support registered for generic
  Jul 29 18:04:07  T1-server kernel: [   64.037070] usbserial: USB Serial Driver core
  Jul 29 18:04:07  T1-server kernel: [   64.038958] USB Serial support registered for GSM modem (1-port)
  Jul 29 18:04:07  T1-server kernel: [   64.041995] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB0
  Jul 29 18:04:07  T1-server kernel: [   64.042155] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB1
  Jul 29 18:04:07  T1-server kernel: [   64.042324] usb 1-2: GSM modem (1-port) converter now attached to ttyUSB2
  Jul 29 18:04:07  T1-server kernel: [   64.042783] option: v0.7.2:USB Driver for GSM modems
  Jul 29 18:04:07  T1-server kernel: [   64.549054] scsi 4:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 09:59:11  T1-server kernel: [143767.734731] usb 1-1: new high-speed USB device number 5 using ehci_hcd
  Jul 31 09:59:12  T1-server kernel: [143769.114496] scsi 5:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 09:59:15  T1-server kernel: [143772.343917] usb 1-1: USB disconnect, device number 5
  Jul 31 09:59:16  T1-server kernel: [143772.922616] usb 1-3: new high-speed USB device number 6 using ehci_hcd
  Jul 31 09:59:16  T1-server kernel: [143773.288882] usb 1-3: GSM modem (1-port) converter now attached to ttyUSB3
  Jul 31 09:59:16  T1-server kernel: [143773.289064] usb 1-3: GSM modem (1-port) converter now attached to ttyUSB4
  Jul 31 09:59:16  T1-server kernel: [143773.289287] usb 1-3: GSM modem (1-port) converter now attached to ttyUSB5
  Jul 31 09:59:17  T1-server kernel: [143774.314210] scsi 6:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 09:59:34  T1-server kernel: [143791.366137] usb 1-1: new high-speed USB device number 7 using ehci_hcd
  Jul 31 09:59:36  T1-server kernel: [143792.754396] scsi 7:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 09:59:39  T1-server kernel: [143796.158952] usb 1-1: USB disconnect, device number 7
  Jul 31 09:59:40  T1-server kernel: [143796.714104] usb 1-4: new high-speed USB device number 8 using ehci_hcd
  Jul 31 09:59:40  T1-server kernel: [143797.079842] usb 1-4: GSM modem (1-port) converter now attached to ttyUSB6
  Jul 31 09:59:40  T1-server kernel: [143797.079995] usb 1-4: GSM modem (1-port) converter now attached to ttyUSB7
  Jul 31 09:59:40  T1-server kernel: [143797.080258] usb 1-4: GSM modem (1-port) converter now attached to ttyUSB8
  Jul 31 09:59:41  T1-server kernel: [143798.122270] scsi 8:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 09:59:55  T1-server kernel: [143811.862772] usb 1-1: new high-speed USB device number 9 using ehci_hcd
  Jul 31 09:59:56  T1-server kernel: [143813.234364] scsi 9:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 09:59:59  T1-server kernel: [143816.254322] usb 1-1: USB disconnect, device number 9
  Jul 31 10:00:00  T1-server kernel: [143816.794671] usb 1-5: new high-speed USB device number 10 using ehci_hcd
  Jul 31 10:00:00  T1-server kernel: [143817.164897] usb 1-5: GSM modem (1-port) converter now attached to ttyUSB9
  Jul 31 10:00:00  T1-server kernel: [143817.165073] usb 1-5: GSM modem (1-port) converter now attached to ttyUSB10
  Jul 31 10:00:00  T1-server kernel: [143817.165207] usb 1-5: GSM modem (1-port) converter now attached to ttyUSB11
  Jul 31 10:00:01  T1-server kernel: [143818.182250] scsi 10:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 10:00:16  T1-server kernel: [143832.770139] usb 1-1: new high-speed USB device number 11 using ehci_hcd
  Jul 31 10:00:17  T1-server kernel: [143834.134241] scsi 11:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 2
  Jul 31 10:00:21  T1-server kernel: [143838.170582] usb 1-6.1: new full-speed USB device number 12 using ehci_hcd
  Jul 31 10:00:21  T1-server kernel: [143838.450636] usb 1-6.1: new full-speed USB device number 13 using ehci_hcd
  Jul 31 10:00:22  T1-server kernel: [143838.746149] usb 1-6.1: new full-speed USB device number 14 using ehci_hcd
  Jul 31 10:00:22  T1-server kernel: [143839.038725] usb 1-6.1: new full-speed USB device number 15 using ehci_hcd
  Jul 31 10:00:22  T1-server kernel: [143839.042798] hub 1-6:1.0: unable to enumerate USB device on port 1
  Jul 31 10:00:22  T1-server kernel: [143839.046211] usb 1-1: USB disconnect, device number 11

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