1. More powwah use, yes

2. Much slower to boot experience (Phoronix benchmark 2.6.24 through 2.6.39), shows 2.6.32 of 10.04 to be in the top tier.

3. Poor Firefox performance 4.01 and not getting better. App hangs in memory when exited.

4. Loss of about 1.5% in crunch efficiency, 0.5-1% even if the GDM service has been killed. Sometimes like for Evolution, 8 copies of the same app keep running... suspect zombie-isms as with Firefox. Kernel 3.6.38.9 was added to repository this weekend for a bunch a quick fixes.

5. See my Confez-ions thread for more comments... few.

6. Needed to take a liking to Unity (WIP), but now it's no different than using Synapse to launch an app... Alt-F2 and type few letter of application i.e. Unity-Dash is superfluous, but for a handy recent apps use list. It's really agitating to have to go to top of screen to get to any app menu and it being hidden when mouse is not there, so aiming for the right menu item is a crime.

But, The 802.11N Wifi has been up without needing intervention for over 3 days and the BM scrollbar did get replaced by the overlay scrollbar, to save some pixels on my 14" display.

--//--

PS, Compiz Unity add-in gives a couple of useful tweaks if you like candy and gloss (and loose more cycles), hence to continued killing of the GUI after use.

Not really formal testing, but after killing the indexing service... not found looked for a way to specifically exclude the /var/lib/boinc-client data-dir yet, the CEP2 efficiencies per BOINCTasks moved into the 96+ percentage and 3 concurrent C4CW, not the lightest stuff, running at 99.5%, so nearly back to optimal. Running 4 concurrent HCMD2 or HCC used to do 99.9% under 10.10 (2.6.35), with the disk access tweaks **, so I'll get to run those for a bit when time is right. Some 6.42 did in the 1.06-1.10 hours range... very little variability, so it will be interesting to see if some minutes can be shaved off after the Natty initiation dust has settled.

I've now removed those tweaks since the 2.6.38 kernel has them now build in... that was doubling up and likely causing some contention in Disk IO.

ttyl

PS, I did the upgrade via the Update Manager, and all including it downloaded 1.9 GB before actually live running the upgrades. All in all it took over 6 hours to complete. Notably, with OpenGL gloss running, not observed any screen freezes at all as used to occur with 10.04 and 10.10. Still finding many more Unity tweaks to apply (there's now one to show System Use/Temps/Fanspeeds in the top panel)... the good ones I'll share in the Confez-ions thread :D

edit: A "positive" review of Natty, for those that like to give Linux a first try: http://www.itworld.com/operating-systems/1619...nuxa-desktop-eve?page=0,0

More for those who like to take their first Linux plunge... a very detailed, and long, 4 page instruction how to get going with all the apps needed: The Perfect Desktop - Ubuntu 11.04 (Natty Nar...e Ubuntu Classic Desktop)

Skip Adobe Reader though. There are a few good alternates in Red Hat Synaptic Package Manager aka RPM, to include an excellent and fast in-line pdf viewer for Firefox, that also allows saving a copy to disk.

--//--

PS, still running 99.5% efficient after last tweaks, 'cept CEP2. :(