[mythtv-users] upgrade to mysql 5.5 breaks frontend

[Stephen Worthington]

On Mon, 27 Oct 2014 08:19:03 +0100, you wrote:

>Hoi All,
>
>I already upgraded my backend to mysql 5.5 without problems some time
>ago. Now my frontends break on the upgrade and I can't seem to find
>the solution. They can no longer connect to the database.
>I run gentoo and used the opportunity to also upgrade the frontends to
>the latest 0.27.4_p20141018. This is not the cause of the breakage. At
>the same time there was a perl upgrade to 5.18.2, but that also
>doesn't seem to be the cause.
>
>I have two regular frontends which were cloned from each other. They
>are both broken on the upgrade. On my regular machine I have it
>installed but only use it for job queuing. This one had mariadb
>installed so mysql is not present and it works without problem. Even
>with all other upgrades.
>On my laptop it was still working and I did some testing. Just
>updating mysql broke it.
>On one of the frontends I replaced mysql with mariadb, but to no
>avail.
>Even recompiling mythtv to ensure the right bindings, doesn't help.
>
>In the log on starting the frontend I get:
>E CoreContext mythdbcon.cpp:114 (OpenDatabase) MSqlDatabase::OpenDatabase(), db object is not valid!
>
>If I start a backend on the broken machines I get a message:
>QSqlDatabase: QMYSQL driver not loaded
>QSqlDatabase: available drivers: QSQLITE QMYSQL3 QMYSQL QODBC3 QODBC
>
>Where do I look?

I thought frontend machines do not have mysql installed (unless some
other software uses it).  They use the backend machine's database.