I had a lot of issues with 3 monitors and recently found most of the 
problems went away after hard coding an xorg.conf file the exact way I 
wanted it set up. Seems KDE has some problems recognizing the 
primary/preferred screen.

-- what AMD are you using? I run Nvidia because I have grown to despise 
AMD and the horrible performance from its drivers and any desktop I've 
used. Right now I'm running a 760 and looking to upgrade. I'm trying to 
be patient because I would really like more than 3.5gb of ram, which 
makes the 3{8,9}0x very intriguing... but I'm really not interested in 
opening windows and watching the black window slowly draw in again, 
amidst a myriad of other graphical glitches.

TDE does have some compositing built into it, and it appears to be 
greatly updated over what I remember being available in 3.x at the time. 
But it is also easily "turn-off-able"(tm)

--Nathan


On 2016-04-20 10:35, Michael Butash wrote:
> Funny you mention this - been struggling with KDE4 and 3x monitors
> when NOT using the binary drivers of late.  I really liked KDE, using
> that predominantly for the past few years on 5-6 montiors just dandy,
> but with amd drivers setting up the screens that worked mostly ok.
> 
> I moved to 3x 4k displays, got rid of amd binary drivers for
> radeon/mesa drivers that were much better (amd binary drivers were
> terrible @4k), except it seems a 5 year old bug stilll affects KDE's
> screen setup/placement.  This was never fixed until kde5, and using
> xrandr manually with a script isn't entirely reliable, forcing me to
> restart lightdm after it glitches the driver about 1 in 3 times.  YaY,
> began looking at other desktops to defect, yet again for more ancient
> bugs no one sees fit to fix.
> 
> TDE looks interesting, but being based on 3.x I wonder, as I hated KDE
> back then.  Does it do compositing at all?  My pref was always
> disabling compositing, but with radeon drivers that work sanely, I'm
> actually liking kde4 now with kwin/plasma.
> 
> I was looking yesterday at getting KDE5.x on this thing, and of course
> there isn't a version for 14.04.  Upgrading is always significantly
> painful with Ubuntu since 11.04, so moving to 15.0x isn't an
> attractive option, and 16.04 seemed as big a basketcase as I had tried
> it recently on my htpc (*still* can't get intel sound to work by
> default!? really?).
> 
> I might go back and try Cinnamon/Mate, compositing driver bugs with
> amd had made every desktop batsh!t crazy I've found, maybe even
> (gasp!) unity.  My experiences might be different without crappy video
> drivers for all their rampant compositing.
> 
> Thanks for sharing!
> 
> -mb
> 
> 
> On 04/20/2016 09:48 AM, Nathan England wrote:
>> 
>> I have been a KDE fan since the early days of 1.0. I have stuck with 
>> it through the ups and downs and loved it when others hated it, and 
>> rallied for it when people were jumping to Gnome or something else.
>> 
>> A couple of years ago I switched full time to Xfce with a full KDE SC 
>> install so I could use all the apps I love and just not have to deal 
>> with the horrible Plasma desktop shell. I really do like everything 
>> about Plasma...in theory. It looks great, and on a single screen it 
>> works great! But on a workstation with 3 or more monitors it really 
>> comes apart at its seems.
>> 
>> But no more! I heard of TDE several years ago, but never looked into 
>> it. Yesterday, I setup the repo for my Fedora 22 and Fedora 23 
>> machines and installed the full Trinity suite. I gotta say, KDE 3 
>> *never* worked this well. I setup shortcuts to many of my preferred 
>> KDE 5 apps like Dolphin and everything is right with the desktop 
>> again!
>> 
>> https://wiki.trinitydesktop.org/Trinity_Desktop_Environment
>> 
> 
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