Comment 11 for bug 367484

Same with USB 3G modem Huawei E1750, contain MicroSD card reader. After insertion sd card in reader and virtual cd with windowsdrivers available, after swiching to modem all storages lost:
Insert:
Sep 16 04:17:49 eee kernel: [29420.528191] usb 5-2: new high speed USB device using ehci_hcd and address 72
Sep 16 04:17:50 eee kernel: [29420.663431] usb 5-2: configuration #1 chosen from 1 choice
Sep 16 04:17:50 eee kernel: [29420.665391] scsi128 : SCSI emulation for USB Mass Storage devices
Sep 16 04:17:50 eee kernel: [29420.666664] scsi129 : SCSI emulation for USB Mass Storage devices
Sep 16 04:17:55 eee kernel: [29425.666345] scsi 128:0:0:0: CD-ROM HUAWEI Mass Storage 2.31 PQ: 0 ANSI: 2
Sep 16 04:17:55 eee kernel: [29425.666468] scsi 129:0:0:0: Direct-Access HUAWEI SD Storage 2.31 PQ: 0 ANSI: 2
Sep 16 04:17:55 eee kernel: [29425.692381] sr0: scsi-1 drive
Sep 16 04:17:55 eee kernel: [29425.692885] sr 128:0:0:0: Attached scsi generic sg3 type 5
Sep 16 04:17:55 eee kernel: [29425.760681] sd 129:0:0:0: [sdd] Attached SCSI removable disk
Sep 16 04:17:55 eee kernel: [29425.760903] sd 129:0:0:0: Attached scsi generic sg4 type 0
Sep 16 04:18:27 eee kernel: [29458.144537] sd 129:0:0:0: [sdd] 122624 512-byte hardware sectors: (62.7 MB/59.8 MiB)
Sep 16 04:18:27 eee kernel: [29458.145425] sd 129:0:0:0: [sdd] Write Protect is off
Sep 16 04:18:27 eee kernel: [29458.147327] sd 129:0:0:0: [sdd] 122624 512-byte hardware sectors: (62.7 MB/59.8 MiB)
Sep 16 04:18:27 eee kernel: [29458.148082] sd 129:0:0:0: [sdd] Write Protect is off
Sep 16 04:18:27 eee kernel: [29458.148138] sdd:

now run usb_modeswitch:

Sep 16 04:19:35 eee kernel: [29526.517978] usb 5-2: USB disconnect, address 72
Sep 16 04:19:40 eee kernel: [29531.372176] usb 5-2: new high speed USB device using ehci_hcd and address 73
Sep 16 04:19:40 eee kernel: [29531.507581] usb 5-2: configuration #1 chosen from 1 choice
Sep 16 04:19:40 eee kernel: [29531.513746] usb-storage: probe of 5-2:1.0 failed with error -5
Sep 16 04:19:40 eee kernel: [29531.513788] option 5-2:1.0: GSM modem (1-port) converter detected
Sep 16 04:19:40 eee kernel: [29531.514363] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB0
Sep 16 04:19:40 eee kernel: [29531.525668] usb-storage: probe of 5-2:1.1 failed with error -5
Sep 16 04:19:40 eee kernel: [29531.525706] option 5-2:1.1: GSM modem (1-port) converter detected
Sep 16 04:19:40 eee kernel: [29531.525917] usb 5-2: GSM modem (1-port) converter now attached to ttyUSB1
Sep 16 04:19:40 eee kernel: [29531.535068] usb-storage: probe of 5-2:1.2 failed with error -1
Sep 16 04:19:40 eee kernel: [29531.537194] usb-storage: probe of 5-2:1.3 failed with error -1

# uname -a
Linux eee 2.6.29-1-netbook #0array1 SMP Mon Feb 23 15:02:03 MST 2009 i686 GNU/Linux