First off, I apologize for not including much terminal information, I am not sure on how to do that, please let me know how to do that so I can make diagnosis of the problem easier.
The main problem that I’m having is that I get these flashing green diagonal lines on the primary display when using youtube for video playback and engaging the tiling hint over the video. I use a dual display setup at 144hz each.
Here is the setup:
Primary display is right, secondary is left.
Primary display has Firefox maximized. YouTube video is in “Theatre” mode.
I start Nautilus, and I drag it so that the tiling hint is over the left side of the primary display.
Once I move the mouse further than the limit that is needed to engage the tiling hint (the tiling hint is no longer present), the tiling hint fades, but for a brief moment the display will flicker with diagonal green lines. It is reproducible.
I have checked cables, displays, and I have even bought a new graphics card as well. Sometimes the graphical bugs with the horizontal lines will happen during the video playback, causing a constant flickering. I have even tried different PCIe slots in my board to see if the issue is the board.
I’m somewhat at a loss for what to do since no one else seems to be having this problem. Thank you very much for your time.
I also have images available to show the graphical glitch. Additionally I can set the video to a specific frame and the graphical bug stay on the display.
I originally posted this to the GNOME discourse, but I haven’t gotten a reply and I’m not quite sure how to diagnose the issue. I’ve used journalctl to see if there’s anything in there, and there are a few window manager warnings, but I’m not sure where to go from there.
Thanks for getting to me, I apologize it took so long to reply until now. I have tried many different things in order to see what the issue could be, but none have succeeded.
I have replaced cables, replaced memory, replaced the graphics card with a different card, tested all PCIe slots on my motherboard, tried using KDE but still got the same bug.
I’m about to the point where I’m ready to go ahead and get a new CPU and motherboard in all honesty.
A big point of interest is that I’m able to “nullify” the bug if I decrease my brightness on my monitor.
Anyway, here are the logs, I’m really at a loss right now.
I’m having a similar issue, that being display flickering at high refresh rates. The odd thing is that I’m on KDE, which suggests that the display manager might not be the issue.
I use a single portable display connected via HDMI. The monitor is a ViewSonic VX1755.
The issue goes away if I set my refresh rate to 60 Hz.
When the issue is present, clicking or scrolling has a chance to trigger the issue and make my screen flicker black, but does not happen 100% of the time even when refresh rate is set to 144 Hz.
Certain UI interactions, such as pressing the “super” key to open the application menu/search bar, can trigger the flickering.
