Under 2.6.28-11-generic: =========================== 1. Connect usb modem (after booting) 2. Registers nicely, cdc_acm gets loaded: [ 586.496037] usb 4-1: new full speed USB device using uhci_hcd and address 2 [ 586.690907] usb 4-1: configuration #1 chosen from 1 choice [ 586.741263] cdc_acm 4-1:1.0: ttyACM0: USB ACM device [ 586.743870] usbcore: registered new interface driver cdc_acm [ 586.743874] cdc_acm: v0.26:USB Abstract Control Model driver for USB modems and ISDN adapters 3. /dev/ttyACM0 is accessible 4. Disconnecting by unplugging works 5. Reconnecting after unplugging works 6. Reconnecting after device restart fails: [ 705.232057] usb 4-1: USB disconnect, address 3 [ 705.969036] usb 4-1: new full speed USB device using uhci_hcd and address 4 [ 706.092033] usb 4-1: device descriptor read/64, error -71 [ 706.316036] usb 4-1: device descriptor read/64, error -71 [ 706.532030] usb 4-1: new full speed USB device using uhci_hcd and address 5 [ 706.652036] usb 4-1: device descriptor read/64, error -71 [ 706.876026] usb 4-1: device descriptor read/64, error -71 [ 707.092033] usb 4-1: new full speed USB device using uhci_hcd and address 6 [ 707.500039] usb 4-1: device not accepting address 6, error -71 [ 707.612029] usb 4-1: new full speed USB device using uhci_hcd and address 7 [ 708.020022] usb 4-1: device not accepting address 7, error -71 [ 708.020035] hub 4-0:1.0: unable to enumerate USB device on port 1 7. Device can no longer be attached to the kernel at all; all attempts*** result in: [ 791.020031] usb 4-1: new full speed USB device using uhci_hcd and address 8 [ 791.140030] usb 4-1: device descriptor read/64, error -71 [ 791.364031] usb 4-1: device descriptor read/64, error -71 [ 791.580027] usb 4-1: new full speed USB device using uhci_hcd and address 9 [ 791.700044] usb 4-1: device descriptor read/64, error -71 [ 791.924040] usb 4-1: device descriptor read/64, error -71 [ 792.140030] usb 4-1: new full speed USB device using uhci_hcd and address 10 [ 792.548028] usb 4-1: device not accepting address 10, error -71
*** = I unplugged the power from the device during reconnection attempts; so there should be no problems with the modem itself -- USB regression from 2.6.24-23-generic with USB GSM-modem https://bugs.launchpad.net/bugs/369190 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
