[Bug 1891408] Re: kubuntu 18.04.5 qa-test, video artifacts & flashes as content on display changes

[Chris Guiver]

I'm going to use this for a like issue on amd64/hirsute

QA-test (Kubuntu HIRSUTE daily) on

dell [optiplex] 990 (i7-2600, 16gb, nvidia geforce gt 6600 gt)
(exploring sddm & video issue primarily, using hirsute for comparison)

session is horrid; graphic glitches are a PAIN. mainly black triangular
shapes that appear to flash/move as I do anything (esp. move mouse-
pointer)..

I couldn't use this box with this issue; quickly giving me a headache
with all the flashing (and making me feel queezy)

Pictures match the photos of the other box once logged in.
I logged out to test SDDM/glitches (that are occurring on this box), and I'll provide a picture of what SDDM looked like (thankfully few flashes at sddm, though it flashed briefly when left idle when the password entry dialog disappeared, or was made to re-appear)

https://photos.app.goo.gl/Zuu1Ltio6dwQzJ6Z6

** Tags added: amd64 hirsute

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Title:
  kubuntu 18.04.5 qa-test, video artifacts & flashes as content on
  display changes

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