[kdepim-users] KDEPIM migration from KDE4 to KDE3.5?

[Ingo Klöcker]

On Monday 09 January 2012, Martin Bernreuther wrote:
> Hello,
> 
> I had a hard time with a OpenSUSE 11.4/KDE4/Kontact1.? Installation.
> After login the KDE4 desktop usually did not respond after a short
> time and I had to kill the session an to re-login (but then it
> worked). And time by time I wrote an email with Kontact and the
> KMail editor windows freezed and I lost everything I wrote (no way
> to copy or save the content and no backup available). Afterwards the
> editor windows freezes again and again until
> ~/.local/share/akonadi is removed and KDE4 restarted.
> And this happend to all users. Anyways...
> 
> I decided to do a fresh OpenSUSE12.1 installation install KDE3.5
> (http://en.opensuse.org/KDE3) and use the KDE3 PIM suite (without
> akonadi). AFAIK there's a migration tool to go from KDE3 to KDE 4,
> but I'm not aware of such a tool to go back from KDE4 to tKDE3 to
> bring the outdated configuration etc. data up to date. The KMail
> part is the most important for me.
> 
> There's typically a mix of IMAP, cached IMAP and POP with mbox and
> maildir data. For IMAP and cached IMAP the configuration  should be
> all to be transfered, but for POP the EMails also have to be copied
> to a new position,. For my own account, which accumulated data from
> several KMail versions the only POP email account saved its data in
> ~/Mail, which was shared between the KDE versions and there are not
> much changes within the configuration itself. This is not the case
> for all users. It's probably not a good idea just to copy
> ~/.kde4/share/config/kmailrc to ~/.kde/share/config/ and
> ~/.kde4/share/apps/kmail to ~/.kde/share/apps/kmail as well as all
> the config files and apps directories for the other kontact
> applications?
> (BTW: It's strange that you find metadata like the number of emails
> ("TotalMsgs") in a "rc" configuration file.)

It's not really that strange at all. Caching of those numbers allows 
displaying the numbers without having to determine the actual numbers 
(which might be incorrect the next second anyway). Determining the 
actual numbers might be slow or even impossible (e.g. if the IMAP 
account is currently unavailable). Okay, the numbers could be cached in 
some other, non-configuration file (e.g. in a database as Akonadi does 
;-) ), but using the already existing configuration file was just 
easier. Developers are generally lazy. Why else would they make 
computers do the boring stuff for them. :-)


> Is there a utility for the migration from Kontact/KDE4 back to
> Kontact/KDE3 or  a documentation about what to take care of?

No. But: AFAIK KMail2 uses different configuration files than KMail1. 
This means you can simply re-use the old configuration files. In fact, 
you might not have to do anything at all.

If re-using the old configuration files is not possible then you'll have 
to re-setup the old KMail or at least some parts. From your other 
message I get that some things worked out-of-the-box with the old 
configuration files. For the rest I suggest to follow Viorel's hints.


Regards,
Ingo
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