[mythtv-users] Undo 14.04 LTS update

[Daryl McDonald]

On Jul 30, 2015 10:36 AM, "Mike Perkins" <mikep at randomtraveller.org.uk>
wrote:
>
> 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
>
>
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Maybe I'm being naive, but the elegance of Mythtv that I've seen so far
leads me to believe there would be a more elegant, less blood sweat and
tears way to upgrade our OS. Something like running "diff" against a
"rsync'd" OS backup  and a fresh install and then have the product
"automagically" inserted appropriately into the new OS release? Is this
even possible? When I upgraded from 12.04 to 14.04, there was plenty of
B,S,&T, due to poor memory of the five or six things (udev, etc) beyond the
database backup and usually only a short window of opportunity to get'er
done.

Thoughts?
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