I just brought a new GeForce RTX 2060 (12GB VRAM) and I fresh installed the latest versions of Manjaro GNOME and KDE Plasma and I have the same problem: My screen is blinking almost all the time, making it difficult to work with.
My PC specs:
Intel Core i5-9600K
Nvidia GeForce RTX 2060 (12GB VRAM)
Corsair Vengeance LPX 48GB DDR4 RAM
Samsung 970 Evo Plus SSD 500GB M.2 NVMe PCI Express 3.0
Xiaomi Mi Curved 34" 4K (Screen)
Btw I’ve tried with both Proprietary & Open-Source drivers and didn’t make any difference. But what I’ve notice is that if I lower the screen Hz the blinking is reduced a lot but moving, opening, or closing windows and apps is a bit laggy… For example, with 144hz I have screen blinking while in 50hz I don’t have so much blinking but I gets kinda laggy. Any idea what may be the problem or something to try out?
This is not the way it should. The HorizSync and VertRefresh are missing. Might want to open Nvidia Settings and get that information, and replace the missing lines in the Section "Monitor".
Here is an example on how it looks on my end.
@cscs I’ve followed your instructions but what it did was to lower my screen’s Hz to 50Hz from 144Hz, which doesn’t really fix the problem.
@Yochanan Just used all the different colors, modes, and changes in my Xiaomi screen and it didn’t fix the problem (I’ve also made a few restarts just to make sure).
I’ve also fresh installed the latest version of Manjaro XFCE and I get the same problem there too. Going to install KDE again, anything to try while installing it that may help? Although fresh install didn’t helped the last time.
Update: Looks like the problem on occurring with Manjaro Linux. Ubuntu, Linux Mint, Fedora, and EndeavourOS are working like a charm, with no screen flickering whatsoever. And I haven’t done any changes either. It’s such a shame I had to replace Manjaro with another Distro so I can keep working.
All these distros use the same infrastructure for graphics. Which is basically Linux Kernel, Vendor Driver and Xorg. So it must be a configuration problem. If you installed Manjaro again and saw the problem, I suggest going on with EndeavourOS as it is also Arch based.
 Try not to compromise your screen refresh rate. Keep it at the highest level possible.