Does it maybe have something to do with the Hz value of the screens? Because like @anon5074910 my screen doesn’t have 144Hz, but 120Hz tho, but no HDR either. Just maybe. Doesn’t matter for me in which mode the app is, full screen, window, w/e
EDIT: Did anything change? Because until yesterday or something it started almost immediately after launching the app, now I’ve been trying to get the white squares for 15 minutes - none 
I wonder which kernel you use @anon5074910? Did you upgrade to 6.3.2 yesterday as well? Maybe it was kernel 6.3.1 issue?
EDIT: Okay was too quick, too. White squares are back
Alas no, I’m running 5.19.0-41. I also don’t think its related to the refresh rate as I dropped it to 60Hz and still the issue persisted.
It’s very odd and intermittent. Sometimes it happens right away within a minute or two and others it might take hours to happen.
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Yeah, probably not related to either kernel or refresh rate. Weird timings as well. Let’s hope it gets fixed in a timely manner on any of the upcoming releases 
Curious – do you have ubuntu pro and security ESM for Infra and Apps enabled ?
Neither. Not running Ubuntu, but Kubuntu 23.04. No ESM available on Kubuntu afaik
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@SartBimpson @BigWheel as an FYI… we can rule out monitor as a factor (at least in my setup). I unplugged my monitors today and used the built in panel on my laptop and the issue still occurred. Also, for fun I plugged in a really old monitor I have and still issue remained. Restarting the OS between attempts.
For me its one of two things, 1) plex changed something in the client which now caused this or 2) some underlining package in ubuntu updated at the same time is now effecting the plex client.
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I’ve experienced this issue on HTPC for a long time. I don’t normally have the mouse running in the background because it causes my HDR to switch in and out.
I’m running Windows to a 60hz HDR tv. I’ve had this issue on my old computer and several others I was testing using different CPU’S and GPU combos
I don’t use Plex for Windows to play media but I haven’t had the issue navigating the UI on my computer
I know HTPC isn’t the issue here but it’s identical to the screen shots I’m seeing, and it’s been around for a long time
@BigWheel, maybe you can ask Gbooker if he’s seen this before. Maybe they already know what causes this and give you some insight on how it might be resolved
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We think this is relate to the updated QT component in linux and macOS builds. We may downgrade linux to use the older one.
@JaysPlex the component was not updated on Windows but could certainly be related to it. If you can provide logs from the app starting up and after you see the artifacts it would be appreciated.
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Hey there guys,
Just wanted to report that I still have those white squares over posters quite often in the Linux app with Plex for Linux v1.71.1. This is happening on X11, if I start a Wayland session I can’t even start the Plex app 
But that’s another issue which I already reported in another thread.
Any updates on this issue?
This is likely due to using Qt 6. Unfortunately we cannot downgrade Linux back to 5 because we had upgraded our OpenSSL version to 3 in the mean time and Qt 5 insists on dlopening an OpenSSL 1 so which causes crashes when the two are in the same process.
I swear that we must be the only ones using QtWebEngine for anything other than the most simple of pages.
This appears to be only with NVIDIA GPUs on Linux. Does it make a difference if you use a different set of drivers? Which are you currently using?
Hey gbooker,
Thank you for providing more detail to this, it makes perfect sense.
I’m on the latest Nvidia proprietary drivers, which are 535.54.03. I’ve had this issue with the white rectangles for over a month now, where NVIDIA updated the drivers 3 times, I believe. So I don’t think it has to do with the driver version, but with what you said Qt6.
If that indeed is the case, shouldn’t the issues be resolved on Linux machines where there’s Qt6 being used rather than Qt5?
Because KDE Plasma is “about” to release the new KDE Plasma environment, fully featured with Qt6. So might that resolve the Plex issues?
And while I have you in the thread: Anything coming to your mind when I tell you that the Plex app doesn’t even start when using Wayland (with Nvidia) rather than X11 session?
I’d love to check if Wayland does any better with the Plex app, but on my machine Plex won’t launch using Wayland as graphic environment
EDIT: And Wayland/Nvidia support is also drastically being improved with the upcoming KDE release
I agree with @SartBimpson, I don’t believe its a nvidia driver problem. I’ve tried nvidia-driver-530, nvidia-driver-525, nvidia-driver-515, nvidia-driver-510 and nvidia-driver-470 and all exhibit this problem.
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Definitely not nvidia drivers–that or not just nvidia drivers. I get the white squares on my Steam Deck (AMD) all the time.
I have the Plex Desktop version 1.78.2 flatpak package installed on Ubuntu 22.04 and am experiencing the same issue as per my post Random White Box. Is there a fix to this at all?
I upgraded to ubuntu 23.10 a couple of days ago and while its still early days these weird white squares are far less prevalent now. I’ve been plagued with these on my linux desktop and while they are NOT completely gone its happening with far less frequency.
After more than half a year and somehow now regardless if using KDE or Gnome - or Wayland or X11 - this issue is still going on and somehow it’s getting frustrating by now.
How can such an obvious issue be unsolved for longer than a few weeks?
I can confirm it’s not only with NVIDIA. I’m running a Pop_OS linux desktop that was on NVIDIA + X11 and had the white squares problem. That machine now has an AMD Radeon GPU with the standard amdgpu open source drivers and I’ve also switched to Wayland. Same white squares problem.
This issue is so strange. It comes and goes even within the same session, within just a few minutes. Generally I can just get up for a coffee or something and the issue will have stopped when I come back, no matter how much I try to reproduce. Until an episode or two later, it’ll be back again.
Also, because I haven’t seen this explicitly mentioned yet, these even appear during playback. I have to keep jostling the mouse and hope the overlay animation clears them up.
I wouldn’t care so much if this weren’t the only way to get hardware decode of some formats =(
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Are there any plans to fix this… like ever? How can this have been an issue for so long?
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