[Interest] Windows-64 specific QML UI flickering

Jean-Michaël Celerier jeanmichael.celerier at gmail.com
Fri May 14 01:56:30 CEST 2021

See also

which may be related

kind regards

On Mon, May 10, 2021 at 2:22 PM Rui Oliveira <ruilvo at hotmail.com> wrote:

> Hey!
> I think I reported a similar thing in
> https://bugreports.qt.io/browse/QTBUG-93084
> Is this like your problem?
> It doesn't happen with Software or OpenGL rendering.
> Às 13:12 de 10/05/2021, Benjamin TERRIER escreveu:
> 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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