[Interest] Windows-64 specific QML UI flickering

Benjamin TERRIER b.terrier at gmail.com
Mon May 10 14:12:09 CEST 2021

On Thu, 6 May 2021 at 02:21, Jason H <jhihn at gmx.com> wrote:

> I use mainly Mac and Android and I don't see these issues, however the
> Windows 64 experience is very crunchy. I was asked to make a simple serial
> port monitor. I developed on my mac. It's solid.
> It's got QML UI using Rows, Columns, Text, TextEdits (Controls v2), and a
> ComboBox (Controls v2) for selecting the serial port.
> However, I've tried it on 2 HP laptops:
> - The first shows triangular artifacts, like a GL triangle is glitching,
> but the triangle is very acute, and fleeting.
> - The other one doesn't glitch with the triangle, it redraws the
> background then draws on top of it (as it should). But here's the crazy
> thing, it's got a rhythm like a heart beat like .....|.|;.....|.|; where
> the | indicate the text fields disappearing, reappearing. (so in one cycle
> the controls flicker twice with a short pause between them, and. along pose
> separating them) One cycle is on the order of about 2 seconds.
> Nothing in the UI falls into this pattern.  The serial port stuff is async.
> How do I fix this?
> Does it look like this: https://bugreports.qt.io/browse/QTBUG-49866
I was never able to fix it, but it only affected a Intel CPU that we only
had in a couple of development PCs.
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