Public bug reported:

[Description]
After hot-swapping sim 1 and sim 2, modem manager restart is needed to be able 
to establish cellular connection.

[Expected result]
After hot-swapping sim 1 and sim 2, cellular connection could be established 
after selecting the appropriate APN profile.

[Actual result]
After hot-swapping sim 1 and sim 2, cellular connection cannot be established 
after selecting the appropriate APN profile

[Steps to reproduce]
1. Assuming that cellular connection was already established using sim 1, 
remove sim 1 from the sim card slot while the system is still booted on.
2. Insert sim 2 in the sim card slot.
3. Check that the sim card is already recognize by running "mmcli -m <index>" 
to check if the sim card information is reflected.
4. From the mobile broadband GUI, select the appropriate APN profile for sim 2. 
Notice that cellular connection cannot be established ==> PROBLEM

[Workaround]
1. Run "sudo systemctl restart ModemManager" to restart Modem Manager
2. Select the appropriate APN profile to establish cellular connection

Ubuntu release version: Ubuntu 20.04.4 LTS
Kernel version: 5.15.0-33-generic (hwe-kernel)

** Affects: modemmanager (Ubuntu)
     Importance: Undecided
         Status: New

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to modemmanager in Ubuntu.
https://bugs.launchpad.net/bugs/1978746

Title:
  Had to restart Modem Manager to establish Mobile broadband connection
  from hotswap

Status in modemmanager package in Ubuntu:
  New

Bug description:
  [Description]
  After hot-swapping sim 1 and sim 2, modem manager restart is needed to be 
able to establish cellular connection.

  [Expected result]
  After hot-swapping sim 1 and sim 2, cellular connection could be established 
after selecting the appropriate APN profile.

  [Actual result]
  After hot-swapping sim 1 and sim 2, cellular connection cannot be established 
after selecting the appropriate APN profile

  [Steps to reproduce]
  1. Assuming that cellular connection was already established using sim 1, 
remove sim 1 from the sim card slot while the system is still booted on.
  2. Insert sim 2 in the sim card slot.
  3. Check that the sim card is already recognize by running "mmcli -m <index>" 
to check if the sim card information is reflected.
  4. From the mobile broadband GUI, select the appropriate APN profile for sim 
2. Notice that cellular connection cannot be established ==> PROBLEM

  [Workaround]
  1. Run "sudo systemctl restart ModemManager" to restart Modem Manager
  2. Select the appropriate APN profile to establish cellular connection

  Ubuntu release version: Ubuntu 20.04.4 LTS
  Kernel version: 5.15.0-33-generic (hwe-kernel)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/modemmanager/+bug/1978746/+subscriptions


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