OK, so after some time trying I can come back with the following results:

While Linux does run on the Sony Vaio Tap11, this machine is not reliable. I 
had a lot of difficulties getting things to run correctly - and the (second 
hand) machine ended hanging itself (battery problem seems). And as the 
battery is not removable and the reset did not work...

The Microsoft Surface Pro 2, on the other hand, works better than I ever 
dreamed. I have got:

- Windows 10 pro "working". I don't like the OS but it's clearly more advanced 
than Linux on the "touch" side. I keep it for some PDF editing and because 
it's one of the "official" OSes at work (our IT people know nothing about 
Linux so they pretend it can't work for them).

- Debian 9 with everything working except screen calibration when rotated. I 
still have to work on that one. Touchscreen, active pen, suspend and 
hibernate (over systemctl) working.

- To do this I had to deactivate secure boot, so I get a red "surface" screen 
at boot (never mind). Debian boots from grub2 but I installed refind to have 
a touch enabled boot screen and that works.

- I had problems because the Linux GUI does not let me enable palm rejection. 
I found a script that does that, but the pen's xinput ID changes frequently. 
I ended up writing a small tcl/tk app that lets me enable / disable the 
touchscreen, so now I can annotate pdfs on the screen (unfortunately only in 
landscape mode).

-Trinity work well in touch mode if you increase fonts and icons a little. Not 
the most beautiful screen ever but I can live with it.

Thierry

Attachments:

• surface3.png
  
• surface2.png