Sorry for a late reply, other things came in between.
Yes it is a driver loading problem and it is caused by the driver named option which doesn't support the modem yet, we will have to wait for linux general support of the stick.
You could however try to do the following after the stick has been switched into modem mode:
rmmod option
rmmod usb_wwan
rmmod usbserial
rmmod sierra
and lsmod to check that the modules did unload.
The modules are dependent on each other so they may have to be unloaded in the right order, if any is remaining then rmmod it again.
Posted: Wed Mar 21, 2012 7:00 Post subject: Connected !!
Thanks LOM,
Your suggestions worked when I ran them all together from the Admin commands (and I am posting this reply using the MF821 with DIR-825). If I ran them one at a time, they reconnected themselves.
<6>[ 24.390000] usb 1-1: new high-speed USB device number 3 using ar71xx-ehci
<6>[ 24.540000] usb 1-1: New USB device found, idVendor=19d2, idProduct=0257
<6>[ 24.550000] usb 1-1: New USB device strings: Mfr=3, Product=2, SerialNumber=4
<6>[ 24.550000] usb 1-1: Product: ZTE LTE Technologies MSM
<6>[ 24.560000] usb 1-1: Manufacturer: ZTE,Incorporated
<6>[ 24.560000] usb 1-1: SerialNumber: MF821_TLSS000000
<6>[ 141.310000] usbcore: deregistering interface driver option
<6>[ 141.310000] USB Serial deregistering driver GSM modem (1-port)
<6>[ 142.100000] usbcore: deregistering interface driver usbserial_generic
<6>[ 142.110000] USB Serial deregistering driver generic
<6>[ 142.110000] usbcore: deregistering interface driver usbserial
<6>[ 142.130000] usbcore: registered new interface driver usbserial
<6>[ 142.140000] USB Serial support registered for generic
<6>[ 142.140000] usbserial_generic 1-1:1.0: generic converter detected
<6>[ 142.150000] usb 1-1: generic converter now attached to ttyUSB0
<6>[ 142.150000] usbserial_generic 1-1:1.1: generic converter detected
<6>[ 142.160000] usb 1-1: generic converter now attached to ttyUSB1
<6>[ 142.170000] usbserial_generic 1-1:1.2: generic converter detected
<6>[ 142.170000] usb 1-1: generic converter now attached to ttyUSB2
<6>[ 142.180000] usbserial_generic 1-1:1.3: generic converter detected
<6>[ 142.180000] usb 1-1: generic converter now attached to ttyUSB3
<6>[ 142.190000] usbserial_generic 1-1:1.4: generic converter detected
<6>[ 142.200000] usb 1-1: generic converter now attached to ttyUSB4
<6>[ 142.200000] usbcore: registered new interface driver usbserial_generic
<6>[ 142.210000] usbserial: USB Serial Driver core
<6>[ 142.230000] USB Serial support registered for GSM modem (1-port)
<6>[ 142.240000] usbcore: registered new interface driver option
<6>[ 142.250000] option: v0.7.2:USB Driver for GSM modems
I live in an outer suburb of Melbourne which does not yet have LTE, so can't test it right now. I will take the router to a friends place and test it so will be able to report back in the next week.
Tried the MF821 in a 4G area of Melbourne, but not with a closeby tower. There was no significant performance difference between the MF821 directly connected to notebook vs connected to the DIR-825 running DD-WRT. I did get download/upload speeds of 50/40 megabits in the car driving past the towers, but could not operate the DIR-825 in the car for comparison.
Speedtest while stick connected to USB port on notebook:
Tried the MF821 in a 4G area of Melbourne, but not with a closeby tower. There was no significant performance difference between the MF821 directly connected to notebook vs connected to the DIR-825 running DD-WRT. I did get download/upload speeds of 50/40 megabits in the car driving past the towers, but could not operate the DIR-825 in the car for comparison.
Speedtest while stick connected to USB port on notebook:
I will try to get a comparison closer to a 4G tower.
Yes please. I am very curious to know where the limit is for a 680MHz cpu as in your DIR-825.
I have no idea, I would consider 30Mbit as a good result but it may be even higher. _________________ Kernel panic: Aiee, killing interrupt handler!
Any idea when linux are likely to fix the problem with the option driver?
I don't know when the option driver will be updated, the more popular a certain stick is the more quicker it becomes supported.
It is a new product so it may take a couple of month. _________________ Kernel panic: Aiee, killing interrupt handler!
That is not what I asked for..
I can not see which mode your stick is in, I can't see the interface list and which drivers has been assigned to the interfaces.
Post the contents of the devices file. _________________ Kernel panic: Aiee, killing interrupt handler!
<6>[ 27.280000] usbcore: registered new interface driver usbserial
<6>[ 27.280000] USB Serial support registered for generic
<6>[ 27.290000] usbcore: registered new interface driver usbserial_generic
<6>[ 27.290000] usbserial: USB Serial Driver core
<6>[ 27.380000] USB Serial support registered for GSM modem (1-port)
<6>[ 27.380000] usbcore: registered new interface driver option
<6>[ 27.390000] option: v0.7.2:USB Driver for GSM modems
<6>[ 27.860000] br0: port 4(ath1) entered forwarding state
I can make it connect manually by running the following commands (from LOM) after the connection has failed