Weird Display Scaling Issues on Thinkpad T15g G2

[Michael Butash]

So I've got a fresh arch up on my new box, a lenovo thinkpad T15g G2 (blame
Stephen Partington, props too though, it's tight), but so far it's been
very weird with the display with KDE, and biggest issue so far remaining is
the desktop scaling, or at least it doing so horribly.

Main Problem: The UI with KDE default is gigantic on both the built-in 15"
display on the lappy, and the 3x 49" displays 4k/60 displays I now have
connected to it on a thunderbolt4 dock (yes, this works, and is glorious).
The UI scaling is just weird, and KDE in their infinite wisdom doesn't
allow negative scaling below 100%, only above.  Boo, jackasses.

Googling my ass off has resulted in nothing good really, few
recommendations to 1) use xrandr to scale ended horribly and 2) using QT to
scale as an environment setting ended horribly.  Both were reverted.

Using xrandr ended up causing some weird display overlapping I simply
couldn't explain, and using the environment scaling for QT caused every KDE
window to freak out, not render, at times flicker enough to cause an
epileptic to have a fit, just all sorts of malfeasance.

So hell, I am wondering if anyone else has run into this display scaling
mess.  Sadly I never have an issue before as it's always too small on 4k
displays, which luckily even my old eyes still deal with, but this gigantor
UI crap someone seems to have added to "help" absolutely sucks.  Any ideas?

I've had to work through a number of issues with it so far all weekend to
get it usable, including random reboots that seem to come and go, but
otherwise really hoping this works out, this is an absolute beast of a
machine.

If you've read this long, thank you!

-mb
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