[Gta04-owner] Modem crashing?

[Radek Polak]

On Tuesday 14 February 2012 13:52:54 Radek Polak wrote:

> Hi,
> i am now playing some more with GTA04's modem. Here is what i am doing:
> 
> 1/ Dial GTA04's number from other phone.
> 2/ Let it ring a few times.
> 3/ Hangup on the other phone.
> 
> After hangup i get this from kernel:
> 
> 	usb 1-2: USB disconnect, device number 2
> 	usb 1-2: new high-speed USB device number 3 using ehci-omap
> 	usb 1-2: New USB device found, idVendor=0af0, idProduct=8800
> 	usb 1-2: New USB device strings: Mfr=3, Product=2, SerialNumber=0
> 	usb 1-2: Product: Globetrotter HSUPA Modem
> 	usb 1-2: Manufacturer: Option N.V.
> 
> To me it looks like the modem crashed or was at least disconnected. Can
> someone try this too? It's under QtMoko v39. I will try from console now...

I found interesting thing - at home it never does it, but here at work it's 
100% reproducible.

I think the problem can be that the modem switches to 3G at work.

Now can we somehow debug this more? Is there more documentation for the modem? 
E.g. can i switch from 3G to 2G only? Can i somehow use the Diagnostics ttyHS?

Regards

Radek



Btw: it's also simply reproducible just using minicom:

AT+CFUN=1                                                                                                      
OK
AT+COPS
OK

RING		<-- here i started call

RING

RING

               <- here i hung up

...and this was again in dmesg:

Feb 15 06:44:04 neo kernel: [  313.932647] 3G Wakeup
Feb 15 06:44:21 neo kernel: [  331.267059] usb 1-2: USB disconnect, device 
number 2
Feb 15 06:44:25 neo kernel: [  335.400665] usb 1-2: new high-speed USB device 
number 3 using ehci-omap
Feb 15 06:44:26 neo kernel: [  335.569732] usb 1-2: New USB device found, 
idVendor=0af0, idProduct=8800
Feb 15 06:44:26 neo kernel: [  335.578033] usb 1-2: New USB device strings: 
Mfr=3, Product=2, SerialNumber=0
Feb 15 06:44:26 neo kernel: [  335.586486] usb 1-2: Product: Globetrotter 
HSUPA Modem
Feb 15 06:44:26 neo kernel: [  335.592742] usb 1-2: Manufacturer: Option N.V.