May  2 12:05:15 marius-T1005 kernel: [18791.997154] xhci_hcd 0000:02:00.0: ERROR Transfer event TRB DMA ptr not part of current TD
May  2 12:05:31 marius-T1005 kernel: [18807.996898] sr 4:0:0:0: Device offlined - not ready after error recovery
May  2 12:05:41 marius-T1005 udevd[9591]: timeout 'cdrom_id --lock-media /dev/sr0'
May  2 12:05:42 marius-T1005 udevd[9591]: timeout: killing 'cdrom_id --lock-media /dev/sr0' [17485]
May  2 12:06:13  udevd[9591]: last message repeated 31 times
May  2 12:06:23  udevd[9591]: last message repeated 10 times
May  2 12:06:23 marius-T1005 kernel: [18859.997078] sr 4:0:0:0: Device offlined - not ready after error recovery
May  2 12:06:23 marius-T1005 kernel: [18860.000567] xhci_hcd 0000:02:00.0: ERROR Transfer event TRB DMA ptr not part of current TD
May  2 12:06:24 marius-T1005 udevd[9591]: timeout: killing 'cdrom_id --lock-media /dev/sr0' [17485]
May  2 12:07:15  udevd[9591]: last message repeated 51 times
May  2 12:07:15 marius-T1005 kernel: [18911.997026] sr 4:0:0:0: Device offlined - not ready after error recovery
May  2 12:07:16 marius-T1005 udevd[9591]: timeout: killing 'cdrom_id --lock-media /dev/sr0' [17485]
May  2 12:08:06  udevd[9591]: last message repeated 50 times
May  2 12:08:06 marius-T1005 kernel: [18963.080268] INFO: task usb_modeswitch:17507 blocked for more than 120 seconds.
May  2 12:08:06 marius-T1005 kernel: [18963.080281] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
...
May  2 12:08:06 marius-T1005 kernel: [18963.080292] usb_modeswitch  D 00070509     0 17507  17470 0x00000000
May  2 12:08:06 marius-T1005 kernel: [18963.080310]  c323dc80 00200086 c1069cdd 00070509 00000000 ffffffff c18f2380 c18f2380
May  2 12:08:06 marius-T1005 kernel: [18963.080340]  c18f2380 c18f2380 7a6ecefc 00001110 c18f2380 f7007380 f2f23f20 f3ec3f20
May  2 12:08:06 marius-T1005 kernel: [18963.080366]  f71073c4 006dd89d f71073ec dd51cbc0 00001110 00000000 00000001 c323dc78
May  2 12:08:06 marius-T1005 kernel: [18963.080393] Call Trace:
May  2 12:08:06 marius-T1005 kernel: [18963.080417]  [<c1069cdd>] ? update_curr+0x24d/0x2a0
May  2 12:08:06 marius-T1005 kernel: [18963.080435]  [<c106a530>] ? check_preempt_wakeup+0x140/0x220
May  2 12:08:06 marius-T1005 kernel: [18963.080451]  [<c157d303>] schedule+0x23/0x60
May  2 12:08:06 marius-T1005 kernel: [18963.080465]  [<c157b85d>] schedule_timeout+0x19d/0x260
May  2 12:08:06 marius-T1005 kernel: [18963.080480]  [<c105d7ca>] ? check_preempt_curr+0x6a/0x80
May  2 12:08:06 marius-T1005 kernel: [18963.080493]  [<c1062b30>] ? ttwu_do_wakeup+0x30/0x110
May  2 12:08:06 marius-T1005 kernel: [18963.080506]  [<c1065e6e>] ? try_to_wake_up+0x1ce/0x230
May  2 12:08:06 marius-T1005 kernel: [18963.080520]  [<c157d188>] wait_for_common+0xa8/0x120
May  2 12:08:06 marius-T1005 kernel: [18963.080533]  [<c1065ed0>] ? try_to_wake_up+0x230/0x230
May  2 12:08:06 marius-T1005 kernel: [18963.080547]  [<c157d2d7>] wait_for_completion+0x17/0x20
May  2 12:08:06 marius-T1005 kernel: [18963.080562]  [<c104eefd>] wait_on_work+0x14d/0x160
May  2 12:08:06 marius-T1005 kernel: [18963.080575]  [<c104d460>] ? do_work_for_cpu+0x20/0x20
May  2 12:08:06 marius-T1005 kernel: [18963.080589]  [<c104efd9>] __cancel_work_timer+0x39/0x120
May  2 12:08:06 marius-T1005 kernel: [18963.080604]  [<c104f0d0>] cancel_delayed_work_sync+0x10/0x20
May  2 12:08:06 marius-T1005 kernel: [18963.080618]  [<c128f5de>] disk_block_events+0x7e/0x80
May  2 12:08:06 marius-T1005 kernel: [18963.080630]  [<c1290657>] del_gendisk+0x27/0x1a0
May  2 12:08:06 marius-T1005 kernel: [18963.080644]  [<c13b288b>] sr_remove+0x2b/0x60
May  2 12:08:06 marius-T1005 kernel: [18963.080658]  [<c1375f2b>] __device_release_driver+0x5b/0xb0
[18963.080671]  [<c1376045>] device_release_driver+0x25/0x40
[18963.080684]  [<c1375363>] bus_remove_device+0xc3/0xf0
[18963.080697]  [<c13737c5>] device_del+0xe5/0x180
[18963.080711]  [<c13a7831>] __scsi_remove_device+0xa1/0xb0
[18963.080724]  [<c13a4357>] scsi_forget_host+0x57/0x60
[18963.080738]  [<c139cb9d>] scsi_remove_host+0x5d/0xf0
[18963.080759]  [<f90c810d>] quiesce_and_remove_host+0x4d/0xc0 [usb_storage]
[18963.080778]  [<f90c8238>] usb_stor_disconnect+0x18/0x30 [usb_storage]
[18963.080793]  [<c13fad10>] usb_unbind_interface+0x40/0x150
[18963.080807]  [<c1375f2b>] __device_release_driver+0x5b/0xb0
[18963.080820]  [<c1376045>] device_release_driver+0x25/0x40
[18963.080833]  [<c13fb057>] usb_driver_release_interface+0x77/0x80
[18963.080848]  [<c1401075>] proc_ioctl+0x175/0x180
[18963.080861]  [<c14013cb>] usbdev_do_ioctl+0x34b/0xa60
[18963.080876]  [<c110fbfa>] ? handle_mm_fault+0xfa/0x220
[18963.080891]  [<c1401ae0>] ? usbdev_do_ioctl+0xa60/0xa60
[18963.080905]  [<c1401aed>] usbdev_ioctl+0xd/0x10
[18963.080918]  [<c114b5a6>] do_vfs_ioctl+0x86/0x2d0
[18963.080931]  [<c114b867>] sys_ioctl+0x77/0x80
[18963.080944]  [<c1584e9f>] sysenter_do_call+0x12/0x28
[18963.996973] sr 4:0:0:0: Device offlined - not ready after error recovery

Eject does not work. Either timeout or the device does not exists. It seems that these extensive stacktraces does not appear at every insertion of the modem, but it still does not work.

When connecting it to the USB 2.0 port, there is no such errors:

[22619.549611] scsi5 : usb-storage 1-1:1.0
[22620.550036] scsi 5:0:0:0: CD-ROM            ZTE      USB SCSI CD-ROM  2.31 PQ: 0 ANSI: 0
[22620.558739] sr0: scsi-1 drive
[22620.559380] sr 5:0:0:0: Attached scsi CD-ROM sr0
[22620.559970] sr 5:0:0:0: Attached scsi generic sg1 type 5
[22627.100137] usb 1-1: reset high-speed USB device number 10 using ehci_hcd
[22628.183131] usb 1-1: USB disconnect, device number 10
[22633.200131] usb 1-1: new high-speed USB device number 11 using ehci_hcd
[22633.439744] usbcore: registered new interface driver usbserial
[22633.439835] usbcore: registered new interface driver usbserial_generic
[22633.439912] USB Serial support registered for generic
[22633.440736] usbserial: USB Serial Driver core
[22633.530364] usbcore: registered new interface driver option
[22633.530445] USB Serial support registered for GSM modem (1-port)
[22633.531143] option 1-1:1.0: GSM modem (1-port) converter detected
[22633.531938] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB0
[22633.532157] option 1-1:1.1: GSM modem (1-port) converter detected
[22633.532500] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB1
[22633.532749] option 1-1:1.2: GSM modem (1-port) converter detected
[22633.533045] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB2
[22633.533152] option 1-1:1.3: GSM modem (1-port) converter detected
[22633.533507] usb 1-1: GSM modem (1-port) converter now attached to ttyUSB3

Can we then conclude that this is probably a Linux kernel issue?