Hi, just upgraded to 2.6.31-15 using karmic-proposed updates. I confirm that E220 doesn't work with this kernel too. Here is the log: [ 118.384091] usb 5-2: new full speed USB device using uhci_hcd and address 2 [ 118.542461] usb 5-2: configuration #1 chosen from 1 choice [ 118.677917] usbcore: registered new interface driver usbserial [ 118.678054] USB Serial support registered for generic [ 118.678157] usbcore: registered new interface driver usbserial_generic [ 118.678162] usbserial: USB Serial Driver core [ 118.693070] USB Serial support registered for GSM modem (1-port) [ 118.693147] usbcore: registered new interface driver option [ 118.693151] option: v0.7.2:USB Driver for GSM modems [ 118.756396] Initializing USB Mass Storage driver... [ 118.758465] scsi6 : SCSI emulation for USB Mass Storage devices [ 118.758725] usb-storage: device found at 2 [ 118.758730] usb-storage: waiting for device to settle before scanning [ 118.758745] usbcore: registered new interface driver usb-storage [ 118.758752] USB Mass Storage support registered. [ 118.789069] usbcore: deregistering interface driver option [ 118.789133] USB Serial deregistering driver GSM modem (1-port) [ 118.805084] usbcore: deregistering interface driver usbserial_generic [ 118.805142] USB Serial deregistering driver generic [ 118.805176] usbcore: deregistering interface driver usbserial [ 118.828673] usbcore: registered new interface driver usbserial [ 118.828705] USB Serial support registered for generic [ 118.828741] usbcore: registered new interface driver usbserial_generic [ 118.828746] usbserial: USB Serial Driver core [ 118.834686] USB Serial support registered for GSM modem (1-port) [ 118.834757] usbcore: registered new interface driver option [ 118.834761] option: v0.7.2:USB Driver for GSM modems [ 118.856062] usbcore: deregistering interface driver option [ 118.856121] USB Serial deregistering driver GSM modem (1-port) [ 118.872049] usbcore: deregistering interface driver usbserial_generic [ 118.872100] USB Serial deregistering driver generic [ 118.872134] usbcore: deregistering interface driver usbserial [ 118.897925] usbcore: registered new interface driver usbserial [ 118.897956] USB Serial support registered for generic [ 118.897991] usbcore: registered new interface driver usbserial_generic [ 118.897996] usbserial: USB Serial Driver core [ 118.910110] USB Serial support registered for GSM modem (1-port) [ 118.910191] usbcore: registered new interface driver option [ 118.910194] option: v0.7.2:USB Driver for GSM modems [ 118.944130] usb 5-2: USB disconnect, address 2 [ 119.684059] usb 5-2: new full speed USB device using uhci_hcd and address 3 [ 119.844129] usb 5-2: configuration #1 chosen from 1 choice [ 119.853846] option 5-2:1.0: GSM modem (1-port) converter detected [ 119.853994] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB0 [ 119.858152] option 5-2:1.1: GSM modem (1-port) converter detected [ 119.858311] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB1 [ 119.860878] scsi9 : SCSI emulation for USB Mass Storage devices [ 119.864950] usb-storage: device found at 3 [ 119.864954] usb-storage: waiting for device to settle before scanning [ 124.864560] usb-storage: device scan complete [ 124.867520] scsi 9:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 [ 124.892494] sr1: scsi-1 drive [ 124.892727] sr 9:0:0:0: Attached scsi CD-ROM sr1 [ 124.892851] sr 9:0:0:0: Attached scsi generic sg2 type 5 [ 135.549821] sr1: CDROM (ioctl) error, command: Get configuration 46 00 00 00 00 00 00 00 20 00 [ 135.549846] sr: Sense Key : No Sense [current] [ 135.549855] sr: Add. Sense: No additional sense information [ 135.839952] sr1: CDROM (ioctl) error, command: Get configuration 46 00 00 00 00 00 00 00 20 00 [ 135.839979] sr: Sense Key : No Sense [current] [ 135.839988] sr: Add. Sense: No additional sense information [ 135.982005] option: option_instat_callback: error -108 [ 135.982213] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 135.982253] option 5-2:1.0: device disconnected [ 135.984905] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 135.984923] option 5-2:1.1: device disconnected [ 136.092047] usb 5-2: reset full speed USB device using uhci_hcd and address 3 [ 136.250503] option 5-2:1.1: GSM modem (1-port) converter detected [ 136.250619] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB0 [ 136.254456] option 5-2:1.0: GSM modem (1-port) converter detected [ 136.254565] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB1 [ 136.652337] option: option_instat_callback: error -108 [ 136.653786] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 136.653824] option 5-2:1.0: device disconnected [ 136.653947] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 136.653978] option 5-2:1.1: device disconnected [ 136.764074] usb 5-2: reset full speed USB device using uhci_hcd and address 3 [ 136.884080] usb 5-2: device descriptor read/64, error -71 [ 137.056177] usb 5-2: USB disconnect, address 3 [ 137.058786] scsi 9:0:0:0: rejecting I/O to dead device [ 137.058839] scsi 9:0:0:0: rejecting I/O to dead device [ 152.980074] usb 5-2: new full speed USB device using uhci_hcd and address 4 [ 153.138456] usb 5-2: configuration #1 chosen from 1 choice [ 153.146478] option 5-2:1.0: GSM modem (1-port) converter detected [ 153.146629] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB0 [ 153.149280] option 5-2:1.1: GSM modem (1-port) converter detected [ 153.149402] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB1 [ 153.150337] scsi14 : SCSI emulation for USB Mass Storage devices [ 153.150650] usb-storage: device found at 4 [ 153.150654] usb-storage: waiting for device to settle before scanning [ 158.148904] usb-storage: device scan complete [ 178.807115] option: option_instat_callback: error -108 [ 178.807310] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 178.807349] option 5-2:1.0: device disconnected [ 178.810288] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 178.810315] option 5-2:1.1: device disconnected [ 178.920080] usb 5-2: reset full speed USB device using uhci_hcd and address 4 [ 179.063482] option 5-2:1.1: GSM modem (1-port) converter detected [ 179.063631] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB0 [ 179.065586] option 5-2:1.0: GSM modem (1-port) converter detected [ 179.065716] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB1 [ 179.102981] scsi 14:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2 [ 179.125300] sr1: scsi-1 drive [ 179.125522] sr 14:0:0:0: Attached scsi CD-ROM sr1 [ 179.125647] sr 14:0:0:0: Attached scsi generic sg2 type 5 [ 191.548531] sr1: CDROM (ioctl) error, command: Get configuration 46 00 00 00 00 00 00 00 20 00 [ 191.548558] sr: Sense Key : No Sense [current] [ 191.548566] sr: Add. Sense: No additional sense information [ 191.811640] sr1: CDROM (ioctl) error, command: Get configuration 46 00 00 00 00 00 00 00 20 00 [ 191.811667] sr: Sense Key : No Sense [current] [ 191.811676] sr: Add. Sense: No additional sense information [ 191.884641] option: option_instat_callback: error -108 [ 191.884786] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 191.884810] option 5-2:1.0: device disconnected [ 191.884882] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 191.884900] option 5-2:1.1: device disconnected [ 191.997054] usb 5-2: reset full speed USB device using uhci_hcd and address 4 [ 192.144014] option 5-2:1.1: GSM modem (1-port) converter detected [ 192.144173] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB0 [ 192.146275] option 5-2:1.0: GSM modem (1-port) converter detected [ 192.146368] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB1 [ 192.543971] option: option_instat_callback: error -108 [ 192.546310] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 192.546333] option 5-2:1.0: device disconnected [ 192.546407] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 192.546425] option 5-2:1.1: device disconnected [ 192.658239] usb 5-2: USB disconnect, address 4 [ 192.665475] scsi 14:0:0:0: rejecting I/O to dead device [ 192.772437] usb 5-2: new low speed USB device using uhci_hcd and address 5 [ 192.841093] hub 5-0:1.0: unable to enumerate USB device on port 2