On Wednesday 06 June 2018 23.56:16 mgb-trinity@... wrote:
> Upgraded from Jessie + TDE Stable to Stretch + TDE PSB.  Upgraded
> cleanly.  On first attempt TDE ran some kind of XDG compliance
> enforcer.
>
> TDM starts and I can log in.  TDE spends half a minute or so
> saying "starting desktop" in the usual way but then I'm left
> with nothing but the cursr and a blue background.
>
> The only anomaly I've found thus far in the logs is (IIRC) an
> ASSERT of "primary_set" from randr.
>
> Any suggestions, tips, or hints would be welcome.  Difficult
> to answer questions as without KMail it is taking me several
> attempts to type perfect headers into telnet that the list
> software will accept.
>
> I have recent backup as a last resort but am hoping for a
> way forward.
>
> Thanks,
>
> --Mike

Difficult to say what it is, but the problem is in the update(s).

I run Stretch + TDE PSB and everything is fine. I never upgrade, I install new 
and migrate the data.

Thierry