Kubuntu 18.04.2 LTS -> Ubuntu 19.04

[Volker Wysk]

> Am Samstag, den 15.06.2019, 11:27 -0400 schrieb Paul Smith:
> > On Sat, 2019-06-15 at 02:52 +0200, Volker Wysk wrote:
> > > > It should be _possible_ because all the packages will have
> > > > appropriate names... however of course at best you'll have a
> lot
> > > > of
> > > > leftover Kubuntu packages lying around on your Ubuntu system.
> > > 
> > > I don't get this. Are you saying that the Kubuntu package names
> > > won't
> > > clash with vanilla-Ubuntu package names?
> > 
> > Right.  The libc package is the same in both, for example.  As best
> > as
> > I understand it Kubuntu is standard Ubuntu with a bunch of other
> > packages installed.
> 
> Yes. And those packages come through the Kubunutu-PPAs, what keeps
> them recent.
> 
> But isn't a (older) version of KDE included in *vanilla* Ubuntu? As
> an
> alternative desktop environment? It should be the same with other
> alternatives, like XFCE/Xubuntu.
> 
> > It's probably wise to separate this operation into two steps:
> > upgrading, and switching from Kubuntu to Ubuntu.  I wouldn't try to
> > do
> > them at the same time.
> 
> Sounds reasonable...
> 
> > I would say your most likely to succeed method would be to FIRST
> > switch
> > your Kubuntu 18.04 to vanilla Ubuntu 18.04.  That is likely the
> best-
> > supported transition: moreso than the non-LTS releases.
> > 
> > After that is all set and your system is running Ubuntu 18.04 well
> > and you've removed all the Kubuntu packages, then do the upgrade
> > process.
> 
> Okay, sounds good.
> 
>  
> > > Or, what would cleaning out the obsolete stuff involve..? Is it
> > > just
> > > identifying no longer needed packages and remove them? Is there
> > > more to
> > > regard?
> > 
> > Well.  The only way to be 100% sure there is nothing crufty left
> > lying
> > around is a fresh installation.
> > 
> > However, you can likely get 90% of the way there by just removing
> the
> > Kubuntu desktop packages.  Of course identifying them all could be
> a
> > chore.
> > 
> > I did a quick Google search and there are LOTS of articles
> discussing
> > how to switch from Kubuntu to Ubuntu without reinstalling.  Many of
> > them are for pretty old versions of Ubuntu but I expect they work
> > more
> > or less the same way now.
> > 
> > Mainly, you first install the ubuntu-desktop package which should
> > depend on everything you need, then you switch your display manager
> > to
> > GDM and your account login to Gnome.  Then when everything is
> working
> > (maybe you can look at running processes to make sure they are
> gnome-
> > related not kde-related) you can remove Kubuntu packages.
> > 
> > There is also very likely to be a bunch of user-specific
> > customizations
> > left in your ~/.config and/or ~/.local directories.  Removing
> > packages
> > won't help with that.  If you care you'll have to _very carefully_
> > remove that by hand (of course you shouldn't remove anything used
> by
> > packages you still use).
> > 
> > As I said I've never done this, so I can't give more than broad
> > outlines.
> 
> Okay, now I see how it might be accomplished. I have to think it
> over. Perhaps, I'll bite the bullet and do a fresh new installation.
> 
> Cheers
> Volker