Weird white squares all over the place with latest version

Yeah this is legit bad. No issues with this on Windows but in Feb I switched to Fedora Linux with KDE. Two systems. One desktop AMD 5900X + NVIDIA 3090FE, and one Framework 16 that has AMD 7940HS + AMD Radeon 7700S / 780M. I have this problem on both systems running the latest Fedora 40 with KDE Plasma. From time to time it is borderline unusable until I close the app, wait 10 seconds, open it up again. Sometimes the issue goes away for a bit sometimes it doesn’t. Close it and open it again and then usually it goes away for a bit. I suspect this is due to the app being X11 based and not Wayland, but my linux is limited. Before someone just says use X11 its been mostly removed from Fedora 40 with KDE. When I was running a version with X11 the issue seemed to be less, but it still showed up.

Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.1
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
Kernel Version: 6.9.7-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 16 × AMD Ryzen 9 7940HS w/ Radeon 780M Graphics
Memory: 27.2 GiB of RAM
Graphics Processor: AMD Radeon 780M
Manufacturer: Framework
Product Name: Laptop 16 (AMD Ryzen 7040 Series)
System Version: AJ

~

Operating System: Fedora Linux 40
KDE Plasma Version: 6.1.2
KDE Frameworks Version: 6.3.0
Qt Version: 6.7.2
Kernel Version: 6.9.8-200.fc40.x86_64 (64-bit)
Graphics Platform: Wayland
Processors: 24 × AMD Ryzen 9 5900X 12-Core Processor
Memory: 31.2 GiB of RAM
Graphics Processor: Quadro RTX 5000/PCIe/SSE2 <<<<Swapped GPU’s to see if that would make a difference.
Manufacturer: ASUS

Because the level of craps given about the Linux client is probably close to zero. I thought I heard they have 1 person doing dev on this client and that was the only reason they even have a client after yelling about needing one for years.
The general rule has been use the web client…the problem is the web client doesn’t let you take offline content. An for a laptop use that is unacceptable.

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If indeed its a Qt bug then does the plex client for linux regularly update the Qt libraries ? If not maybe a bump to the latest version might help with this VERY annoying bug. Thanks.

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Unfortunately, a newer Qt version is not a solution because the rending of the UI with alpha is completely broken in all versions past what we are currently using (could really be the results of changes in how Chromium renders). This would mean that you would be left seeing black rendered on top of the video which is clearly not a solution.

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Understood, thanks for the info. Goes without saying that I hope someday a solution to this can be found.

(black rendered on top of the video) BTW I actually got that on my Framework 16 laptop running Fedora 40. I was getting a screen door effect over the display until I did fullscreen. Thankfully an update did fix that at some point.
Question. When you say alpha are you talking alpha blending? Would it be an option / possible to have a toggle to just outright turn that off in the UI? Or would that just outright break the app. I don’t know. Just spittballing ideas.

Keeping this thread alive as this is a continuing, ongoing issue that is driving me nuts.

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Same Problem. Linux Mint, AMD APU (Ryzen5 4500u) Flatpak

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Yup, still happening here. AMD radeon in PopOS flatpak. I don’t see how this cannot be spotted before a release… it literally happens when you click on anything. It’s just brutal.

The first linux releases didn’t have any sound control… then everything worked fine… and now this white box stuff has been happening for months. Frustrating to say the least.

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I’ve been having the issue as well for months.

KDE Neon 6.0
KWin version: 6.1.5
Qt Version: 6.7.2
Qt compile version: 6.7.2
XCB compile version: 1.14
Operation Mode: Xwayland

Plex 1.102.1 Flatpack

Ryzen 3400G APU

Been having the same issue for over a year now.

Pop OS 22.04LTS
GNOME 4.9
Windowing System X11

AMD Radeon RX 6900 XT

AMD Ryzen 7 3700x

Same issue, sadly.

Mint 22
i5 2500k
2060 super

This is happening to me as well on Fedora 41

Intel N100 CPU w/ iGPU graphics

Please Mr. John Plex, fix this and end our suffering.

I also still have this problem.
Currently Fedora 41, Wayland, nVidia driver 565.57.01, flathub plex

same problem, ubuntu 24.10 on an amd cpu+gpu plattform

why is Plex HTPC client unaffected then?

Plex HTPC seems to be using qt5.

If this truly is a bug in QT6 I doubt we’ll ever see this fixed unless the Plex team digs further and reports the issue upstream. Still, just leaving a comment here for the sake of more exposure, in the vain hope they start caring about this. Not much else us end users can do.

Still happening in the Flatpak - version 1.107.2.300-7093f413.
Running Wayland on an AMD GPU + CPU setup, but my X11 session is affected as well.

I’m going to keep this alive as clearly there is a problem, and whoever is maintaining the app isn’t reporting the bug to whoever is handling QT. If I was a programmer, knew how to debug this, and knew how to report a bug to QT I would. Clearly someone is pushing updates as I’m getting an update of this app every month or so. But I really doubt the team, or person managing the Linux client is even paying attention to posts like this.