[mythtv-users] Recommendations for Upgrade from 0.27 at 14.04?

[Peter Bennett]

On 02/17/2018 10:39 AM, Nicolas Krzywinski wrote:
>
> Hi all,
>
> my MythTV system runs for a long time now on semi-heavy duty and 
> provides excellent service. Thanks to all people that ever 
> participated in making this possible!
>
> While I run this system for a long time in a version-freezed state on 
> purpose, I am planning to upgrade now. The reason for the version 
> freeze was the demand of time and skills, any upgrade requested from 
> me - as I am not good in this and always struggled with these 
> challenges, I decided to stop doing any upgrades.
>
> Now I wonder of the best upgrade strategy:
>
>  1. 16.04 --> 0.28 --> 0.29
>  2. 0.28 --> 16.04 --> 0.29
>  3. 0.28 --> 0.29 --> 16.04
>  4. 16.04 --> 0.29
>  5. 0.29 --> 16.04
>
> where:
>
>   * 16.04 means upgrading to Ubuntu 16.04
>   * 0.28 means upgrading to MythTV 0.28
>   * 0.29 means upgrading to MythTV 0.29
>
> each from the respective system state.
>
> Bringing the current system to the most recent state of 14.04.x always 
> is the prerequisite step zero, of course.
>
> Pausing or stopping at one intermediate step are options as well, if 
> there are some reasons.
>
> As for all my upgrades on all of my systems, I will do a full system 
> backup on an external ssd prior to the upgrade process (and will test 
> if the system is able to directly boot from this backup), cause 
> loosing MythTV services would be a medium catastrophe! ;-)
>
> Thanks in advance for any recommendations, experiences or warnings, 
> regarding the upgrade procedure from these versions and/or when having 
> my hardware devices (see below).
>
> -- 
> Nicolas
>
> MythTV fixes/0.27 [v0.27.4-30-g3b43903]
> Ubuntu 14.04.1 LTS (GNU/Linux 3.13.0-45-generic x86_64)
> Digital Devices GmbH Octopus DVB Adapter via ddbridge kernel module
> 15c2:0036 SoundGraph Inc. LC16M VFD Display/IR Receiver (imon) via LIRC/devinput
> Intel Corporation Core Processor Integrated Graphics Controller (rev 12)
>
I would recommend waiting until April for the next Ubuntu Long Term 
release 18.04, that will mean you have 5 years before you need to 
upgrade again.

What I normally do is create an extra partition of 30 GB to install the 
next Operating system version, so that the current version is still 
available until you have everything working. I prefer not to upgrade the 
operating system in place.

You can install the new operating system version and MythTV version 29 
in a new partition. You do not need to upgrade MythTV from 0.27 to 0.28 
and then to 29. You can go direct from 0.27 to 29.

If you set up a new partition and install the Operating system there, 
grub will create a boot menu with both systems and the new one starting 
up by default. I recommend reinstall grub into the original partition so 
that one boots by default and the new one is available for selection. 
Once you are ready to switch to the new one, reinstall grub into the new 
partition, so that it boots by default and the old one is available for 
selection.

You can take a database backup from the old partition and restore it 
into the new partition. Run mythtv-setup to upgrade the database to 
version 29. You can do testing in the new partition and then reboot to 
switch to the old partition for recording. Once you are happy with the 
new system you can backup and restore the database again in case there 
were more recordings made on the old system.

It is important to make sure the mythtv user name keeps the same numeric 
id in the new partition, or else change your recordings 
permissions/ownership so that the new system can access them.

Peter
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