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Thread: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64bit)

  1. #1
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    Default UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64bit)

    On a Dell Latitude 6320, using opensuse 12.1 64 bit, this card normally asks for its PIN, as soon as I log into KDE. I can then use the networkmanager to make a UMTS/EDGE/GPRS connection. With opensuse 12.2, the PIN is never requested, and I am also unable to activate "enable mobile broadband". All regular wifi works as it should, but the broadband just remains dead.

    When I start a 12.1 live system, it works as it should, and it also works under windows 7.

    When the hardware switch is on, rfkill outputs this:

    0: dell-wifi: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    1: dell-bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
    2: dell-wwan: Wireless WAN
    Soft blocked: no
    Hard blocked: no
    3: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no
    4: hci0: Bluetooth
    Soft blocked: no
    Hard blocked: no
    Any idea what I could do to fix this? I tried to follow various suggestions including a patched network manager, but this all seems to relate to wifi problems anyway, not to the broadband thing. And consequently, none of those suggestions helped.

    I earlier posted this under "Hardware" but cannot figure out how to transfer to "Wireless".

  2. #2
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    On a Dell Latitude 6320, using opensuse 12.1 64 bit, this card normally asks for its PIN, as soon as I log into KDE. I can then use the networkmanager to make a UMTS/EDGE/GPRS connection. With opensuse 12.2, the PIN is never requested, and I am also unable to activate "enable mobile broadband".
    I don't profess to know where the regression lies, but my suspicion would be with ModemManager. (It's easy enough to test anyway). Try downgrading the ModemManager package to the openSUSE 12.1 version.

    Navigate to

    software.opensuse.org:

    and select 'Show other versions'. Download the required package.

    As a quick test, I downloaded the 12.1 version and the following 'dry-run' indicated no package conflict issues
    Code:
    # zypper in --dry-run --force ModemManager-0.5-3.1.3.x86_64.rpm 
    Loading repository data...
    Reading installed packages...
    Forcing installation of 'ModemManager-0.5-3.1.3.x86_64' from repository 'Plain RPM files cache'.
    Resolving package dependencies...
    
    The following package is going to be downgraded:
      ModemManager 
    
    1 package to downgrade.
    Overall download size: 220.0 KiB. After the operation, 130.9 KiB will be freed.
    Continue? [y/n/?] (y): y
    You'll need to restart the network manager
    Code:
    rcnetwork restart
    then proceed to testing you broadband connection.

    Does it then behave as it did with your 12.1 install?

  3. #3
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    I liked the idea and tried it - but no, the behaviour is exactly the same. No way to enable the card.

  4. #4
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    Well. it's good to have eliminated it I guess. Does toggling the 'Enable mobile broadband' (or starting over with the mobile broadband config) make a difference with the PIN dialogue?

    My next guess is a possible regression with the supporting kernel device driver. (This would require a bug report be submitted upstream if it's proven).

    From the info I gleamed here

    SourceForge.net: MBM - mbm

    I learned that the f5521gw device is supported by the 'cdc_ncm' driver (which depends on the underlying usbnet driver).

  5. #5
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    Another thought I just had - The KDE NM config utility allows you to 'store' or 'always ask' for the PIN. Have you tried experimenting with this? Connection secrets can be stored in kwallet, by the network manager as a plain text file, or asked for each time you connect. This is set in Network Management Settings >> Other

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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    Quote Originally Posted by deano_ferrari View Post
    Well. it's good to have eliminated it I guess. Does toggling the 'Enable mobile broadband' (or starting over with the mobile broadband config) make a difference with the PIN dialogue?
    It won't let me enable it - I click, but no change in the box occurs...

    Quote Originally Posted by deano_ferrari View Post
    My next guess is a possible regression with the supporting kernel device driver. (This would require a bug report be submitted upstream if it's proven).

    From the info I gleamed here

    SourceForge.net: MBM - mbm

    I learned that the f5521gw device is supported by the 'cdc_ncm' driver (which depends on the underlying usbnet driver).
    Yes that is the driver, but I don't have the skills to verify anything about it really...

  7. #7
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    Quote Originally Posted by deano_ferrari View Post
    Another thought I just had - The KDE NM config utility allows you to 'store' or 'always ask' for the PIN. Have you tried experimenting with this? Connection secrets can be stored in kwallet, by the network manager as a plain text file, or asked for each time you connect. This is set in Network Management Settings >> Other
    Yes I did experiment with that.

    On 12.1, I left it in the default "always ask" and was a little surprised that it always asked during login into kde, no matter what I chose of networking. When this no longer happened (in 12.2) I tried to give it the PIN through the NM, but this did not change anything of its behaviour (probably since NM anyway thinks of it as being disabled).

  8. #8
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    When you upgraded to 12.2, I assume you kept all your NM connection definitions? That is, you didn't try making the connection again? I'm just wondering if something might have changed with the newer version of network manager that prevents it from using the older definition....just an idea.

    System connections are located in the /etc/NetworkManager/system-connections/ directory. User-defined connections are located in ~/.kde4/share/apps/networkmanagement/connections/

  9. #9
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    Just a question:

    in ~/.kde4/share/apps I do not have anything called networkmanagement. Instead, I find all my defined connections, as you say, under /etc/NetworkManager/system-connections/ in easily readable form.

    What would you do to test a totally "fresh" connection for the broadband thing? I am slightly nervous to loose all my predefined wifi connections given under the /etc directory...

  10. #10
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    Default Re: UMTS Card Dell DW5550 (identical to Ericsson F5521gw) no longer works after upgrade to 12.2 (64b

    Just remove the relevant file
    Code:
    rm -f /etc/NetworkManager/system-connections/<name_of_you_broadband_connecion>

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