[mythtv-users] Undo 14.04 LTS update

[Mike Perkins]

On 30/07/15 15:07, Stuart Auchterlonie wrote:
> On 30/07/15 12:22, Daryl McDonald wrote:
>>
>> On Jul 30, 2015 4:04 AM, "Mike Perkins" <mikep at randomtraveller.org.uk
>> <mailto:mikep at randomtraveller.org.uk>> wrote:
>>>
>>> On 30/07/15 00:32, Robin Gilks wrote:
>>>>
>>>> Greetings all
>>>>
>>>> Since I've not had a problem with it on a couple of *buntu installs, I
>>>> updated my Mythbuntu frontend with the "LTS Enablement Stacks" and its a
>>>> disaster :(
>>>>
>>>> The box randomly gets into a stuttering state that requires a reboot to
>>>> fix it during which time it runs much hotter.
>>>>
>>>> I'm pretty sure the kernel upgrade is OK (fixes USB3 mceusb remote
>> issues)
>>>> but the xserver and mesa updates seem to be what has broken things.
>>>>
>>>> The original update was
>>>> "sudo apt-get install --install-recommends linux-generic-lts-utopic
>>>> xserver-xorg-lts-utopic libgl1-mesa-glx-lts-utopic
>>>> libegl1-mesa-drivers-lts-utopic"
>>>>
>>>> I've no idea how I find out what was originally installed so how do I
>>>> revert everything bar the kernel?
>>>>
>>>> Cheers
>>>>
>>> I've always found these sorts of "upgrades" to be problematical. My
>> preference is to do full backups of needed files/configurations and then
>> a clean install.
>>>
>>> This ensures that everything is consistent. Upgrading over the top of
>> an existing install usually leaves odd library inconsistencies which are
>> difficult to resolve.
>>>
>>> --
>>>
>>> Mike Perkins
>>>
>>
>> Mike what is your method for getting that full backup? Is there a script
>> that separates the myth add ons from the previous install?
>>
>>
>
> Personally i would use the "seat of pants" method. (Not suitable for
> novice installers)
>
> ie. If you store all your recordings on a separate drive / partition
> then you dump your full database to that partition, with anything else
> interesting like ssh keys.
>
> Then go forth, and re-install making sure not to reformat the recordings
> drive / partition.
>
> Once the OS is install get mythtv built / installed, restore database,
> cross fingers and start it all up.
>
> If it all goes wrong you get to restore from backup.. ;-)
> I did mention this was the "seat of pants" method and contains no
> backup instructions at all...
>
Almost exactly it. I have a "backup" directory on my first recording volume, 
which is where the db backups usually go anyway.

As well as those I make sure I have copies of things like config.xml and 
selected items like ssh keys and ntp.conf, my.conf, and so on.

Note: If you do do this, be aware that some OSs create the mysql database with a 
new, randomized mythtv password! Of course you can overwrite this when you 
restore but it might cause some head-scratching.

Oh, and my policy on a new install is always to create the 'mythtv' user 
*before* installing the mythtv software. This ensures that it is created as a 
regular user, with a home directory under /home, not /var/lib. It also means you 
get to choose the uid, gid, etc if that is important to you.

-- 

Mike Perkins