On 24 October 2011 15:41, Greg KH <greg@xxxxxxxxx> wrote: > Ick, this bug has been fixed already, I suggest you update your kernel > to the latest version. > > Also, try this without the nvidia driver running, we can't support your > kernel when you use it, sorry. Thanks Greg and Alan. Ok, so I rebooted the same kernel (just to be on the safer side), which IMO was recent enough. And this modem started working, with no nvidia driver loaded. This is just fine, as I do not run X on this box. But, this raises another question, I am connecting the other USB modem (the first one) to the same USB port, and it does not work (and both the USB modem work on two other laptops). So, I am a bit sceptical about this being a hardware issue. Now since the second modem has started working, to focus back on the first (erring) modem. Here are some details: dmesg output is as follows: [ 1697.766534] usb 3-2: new full speed USB device number 68 using ohci_hcd [ 1702.758068] scsi42 : usb-storage 3-2:1.0 [ 1702.943199] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1703.169870] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1703.179875] usb 3-2: USB disconnect, device number 68 [ 1703.713196] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1703.939872] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1704.229860] usb 3-2: new full speed USB device number 69 using ohci_hcd [ 1704.619863] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1704.846533] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1705.043197] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1705.269868] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1705.466527] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1705.693197] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1705.889859] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1706.116535] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1706.313194] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1706.539866] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1706.736527] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1706.963201] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1707.159862] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1707.386538] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1707.583193] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1707.809862] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1708.006575] hub 4-0:1.0: unable to enumerate USB device on port 1 [ 1708.236534] hub 2-0:1.0: unable to enumerate USB device on port 1 [ 1708.246536] usb 3-2: USB disconnect, device number 69 This connecting and disconnecting continues as long as device is plugged in. The lsusb output is as follows (the USB modem device has the ID: 15eb:1231): Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 003: ID 064e:a101 Suyin Corp. Acer CrystalEye Webcam Bus 004 Device 003: ID 0a5c:2101 Broadcom Corp. Bluetooth Controller Bus 003 Device 069: ID 15eb:1231 I have attached lsusb -v and usbmon command output as well. Thanks for your help and patience, guys. -OBD
Attachment:
usbmon.log.gz
Description: GNU Zip compressed data
Attachment:
lsusb-v-output.gz
Description: GNU Zip compressed data
