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== Modem 3G ZTE MF622 ==

=== Problem ===

The problem about this modem have been discuted on Bug [[https://bugs.launchpad.net/ubuntu/+source/hal-info/+bug/305968|305968]]

=== Solution ===

==== Ubuntu 9.04 ====

===== Hal-info correction =====
In many cases this problem can be solved only changing [[https://launchpad.net/ubuntu/+source/hal-info|hal-info]] :

{{{
gksudo gedit /usr/share/hal/fdi/information/10freedesktop/10-modem.fdi
}}}

Search for '''0x19d2''' and move device '''0x0001''' from usb.interface.number '''0''' to '''2''', see above:

{{{
      <match key="@info.parent:usb.vendor_id" int="0x19d2">
        <!-- Qualcomm: Telstra/NextG CDMA , ZTE CDMA Tech -->
        <match key="@info.parent:usb.product_id" int="0xfffe">
          <match key="@info.parent:usb.interface.number" int="0">
            <append key="modem.command_sets" type="strlist">IS-707-A</append>
          </match>
        </match>
        <!-- ZTE MF626 HSDPA USB dongle -->
        <match key="@info.parent:usb.product_id" int="0x2000">
          <match key="@info.parent:usb.interface.number" int="0">
            <append key="modem.command_sets" type="strlist">GSM-07.07</append>
            <append key="modem.command_sets" type="strlist">GSM-07.05</append>
          </match>
        </match>
        <!-- ZTE MF628 HSDPA USB dongle -->
        <match key="@info.parent:usb.product_id" int="0x0015">
          <match key="@info.parent:usb.interface.number" int="3">
            <append key="modem.command_sets" type="strlist">GSM-07.07</append>
            <append key="modem.command_sets" type="strlist">GSM-07.05</append>
          </match>
        </match>
        <!-- ONDA MF632 HSDPA USB dongle -->
        <match key="@info.parent:usb.product_id" int_outof="0x0001;0x0002">
          <match key="@info.parent:usb.interface.number" int="2">
            <append key="modem.command_sets" type="strlist">GSM-07.07</append>
            <append key="modem.command_sets" type="strlist">GSM-07.05</append>
          </match>
        </match>
      </match>
}}}

Clear fdi-cache:

{{{
sudo rm /var/cache/hald/fdi-cache
}}}

Now Shutdown your system, plug the USB Modem and boot the system.

''Note: this only will work if you boot with modem already connected to your computer, if you plug the modem in a running system the device is not recognized''

===== Kernel Compilation =====
IF you have problem with Plug/Unplug the modem on a running system and you want solve this you will need recompile your kernel.

''Before you continue please read this [[https://help.ubuntu.com/community/Kernel/Compile|KernelCompile]].''

To start, you will need to install a few packages. 

{{{
sudo apt-get build-dep linux
sudo apt-get install linux-source fakeroot build-essential makedumpfile
}}}

Extract your linux source:

{{{
cd /usr/src
sudo tar xjvf /usr/src/linux-source-<version-number-here>.tar.bz2
cd linux-source-<version-number-here>
}}}

Now edit unusual_devs and comment/remove device '''0x19d2:2000''' from list:

{{{
gksudo gedit drivers/usb/storage/unusual_devs.h
}}}

{{{
/* Reported by Mauro Andreolini <andreoli@weblab.ing.unimo.it>
 * This entry is needed to bypass the ZeroCD mechanism
 * and to properly load as a modem device.
 */
/*UNUSUAL_DEV(  0x19d2, 0x2000, 0x0000, 0x0000,
		"Onda ET502HS",
		"USB MMC Storage",
		US_SC_DEVICE, US_PR_DEVICE, NULL,
		US_FL_IGNORE_DEVICE),
*/
}}}

After that you must recompile your kernel and make respective deb's:

{{{
sudo fakeroot make-kpkg --initrd kernel-image kernel-headers
}}}

or, if you have a multicore CPU you can use CONCURRENCY_LEVEL variable with 1 + Number of CPU cores:

{{{
sudo CONCURRENCY_LEVEL=3 fakeroot make-kpkg --initrd kernel-image kernel-headers
}}}

This will create 2 deb's files under ''/usr/src''

Now you can install your new kernel files

{{{
cd /usr/src
sudo dpkg -i linux-image-*.deb
sudo dpkg -i linux-headers-*.deb
}}}

Now reboot your system and load your new kernel, to test unplug/plug your modem.

Sometimes your device can be mounted as USB Storage, to go back to modem mode just eject device 19d2:2000 (this can be done using Nautilus) and wait until USB change to device 19d2:0001. You can check if device has changed using :

{{{
lsusb | grep 19d2
}}}

This must return device 19d2:0001 

{{{
Bus 004 Device 007: ID 19d2:0001
}}}

Now, try to connect. Maybe you need try to connect many times ( aprox. 4 )  until get connection sucessfull.


==== Ubuntu 9.10 ====

===== Changing udev rules =====

Those experiencing similar problem in Karmic may try this simple step :

Rename /lib/udev/rules.d/'''61'''-mobile-action.rules
to /lib/udev/rules.d/'''51'''-mobile-action.rules

Then unplug the modem, and plug it again.

This time it should be detected after a while by Karmic.


== References ==

Bug [[https://bugs.launchpad.net/ubuntu/+source/hal-info/+bug/305968|305968]]

[[https://help.ubuntu.com/community/Kernel/Compile|KernelCompile]]

----


Author: Cleber Santz
----
CategoryNetworking