Just relax and have fun :-)))
There are umpteen more distros to test!
/Santa Claes
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@Claes, I think I figured out my issues, setting up a shiny new user account in Kubuntu, and downloading a fresh copy of a few troublesome appissues (Kdenlive, Krita, and Mandelbulber2.24) while logged in as the shiny new user, no issues running theseā¦ So I suspect itās some sort of config file issue on my old /home/brian folder, which I have retained from umpteen different distro installs over the past few years.
So perhaps time to back up my files, and do a clean install with a shiny new /home partition and user.
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Morning!
Yes, most presumably you have values in the āoldā .config/.cache
that you ought not to copy into your ānewā hidden folders.
Worth some experimentation!
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@Claes, I bought an 8tb external USB 3.0 drive, so Iām slowly backing all my photos and data up. Happily I found some photos from around 2009 / 2010 when I had some holidays down Dumfries & Galloway at the South West of Scotland 
Will be good to have a look at those again once they are safely backed up!
8TB? Gulp.
I remember what one of my gurus, Donald E Knuth, once wrote:
if only he had 4K core memory and 7 tape stations, of which 3 also
should be able to read backwards ā then he could do anything
in this world.
He was right. But each run would take a l-o-n-g time to execute.
Days, perhaps.
I have often wondered how he would have reacted, had he been able
too see what I presently have at me feetā¦
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Heās still aliveā¦ ?
96KB
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I always say that developers should get machines a few generations old so they write optimised code 
(I say this as a developer who just got a company laptop with 64 GB of RAM, some 10 core processor and a 1 TB M2 SSD)
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PS: As far as I recall, Mr. Knuth wrote those lines in the 1960sā¦
Really is one of the main reasons I keep this Surface 3 around. That, and a Windows machine for testing the wininstallers I make with my gcc/mxe toolchain on Ubuntu. Using it right now for casual browsing because the Surface Pro 7 I received last week is on the way back to MS for exchange, broke horribly after just one day of useā¦
I donāt think even a legend like Mr Knuth would be able to solve the halting problemā¦