Hi,

I have for a while tried to use a HUAWEI E1752 USB GSM modem, but unfortunately without success.
For some reason it wont switch to modem mode so any help will be appreciated.

lsusb shows ID = 12d1:1446 also after running modem-modeswitch.

I have also tried to build usb-modeswitch, but that package wont build and I'm i little unsure if I should use that package or modem-modeswitch is the correct one.

Output from dmesg and modem-modeswitch inserted below.



dmesg output when attaching the E1752 modem
*********************************************************************************************************                                                              
hub 2-0:1.0: state 7 ports 3 chg 0000 evt 0004                                                      
ehci-omap ehci-omap.0: GetStatus port 2 status 001803 POWER sig=j CSC CONNECT                       
hub 2-0:1.0: port 2, status 0501, change 0001, 480 Mb/s                                             
hub 2-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x501                                
ehci-omap ehci-omap.0: port 2 high speed                                                            
ehci-omap ehci-omap.0: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT                      
usb 2-2: new high speed USB device using ehci-omap and address 2                                    
ehci-omap ehci-omap.0: port 2 high speed                                                            
ehci-omap ehci-omap.0: GetStatus port 2 status 001005 POWER sig=se0 PE CONNECT                      
usb 2-2: default language 0x0409                                                                    
usb 2-2: udev 2, busnum 2, minor = 129                                                              
usb 2-2: New USB device found, idVendor=12d1, idProduct=1446                                        
usb 2-2: New USB device strings: Mfr=3, Product=2, SerialNumber=0                                   
usb 2-2: Product: HUAWEI Mobile                                                                     
usb 2-2: Manufacturer: HUAWEI Technology                                                            
usb 2-2: usb_probe_device                                                                           
usb 2-2: configuration #1 chosen from 1 choice                                                      
usb 2-2: adding 2-2:1.0 (config #1, interface 0)                                                    
usb-storage 2-2:1.0: usb_probe_interface                                                            
usb-storage 2-2:1.0: usb_probe_interface - got id                                                   
scsi0 : usb-storage 2-2:1.0                                                                         
drivers/usb/core/inode.c: creating file '002'                                                       
scsi 0:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 2                        
sr0: scsi-1 drive                                                                                   
Uniform CD-ROM driver Revision: 3.20                                                                
sr 0:0:0:0: Attached scsi CD-ROM sr0                                                                
sr 0:0:0:0: Attached scsi generic sg0 type 5                                                        
ISO 9660 Extensions: Microsoft Joliet Level 1                                                       
ISOFS: changing to secondary root
*********************************************************************************************************           

lsusb
*********************************************************************************************************           
root@overo:~# lsusb                                                                                 
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 002 Device 002: ID 12d1:1446 Huawei Technologies Co., Ltd.                                                   
*********************************************************************************************************           

running modem-modeswitch manual
*********************************************************************************************************           
root@overo:~# /lib/udev/modem-modeswitch -v 0x12d1 -p 0x1446 -t option-zerocd -d                    
D: Found mass storage device:                                                                       
D:   Endpoints: 2                                                                                   
D:   Class:     0x8                                                                                 
D:   SubClass:  0x6                                                                                 
D:   Protocol:  0x50                                                                                
D: Found modem mass storage device '002'                                                            
D: 002: found already attached driver 'dummy'                                                       
scsi 0:0:0:0: rejecting I/O to dead device                                                          
D: 002: REZERO command sent.                                                                        
D: 002: failed to switch device to modem mode.
*********************************************************************************************************           


BR
Benny