Flickering / Flashing / Refreshing UI?

Answered

I've seen so many topics on this but no one seems to have a solution or admittance that it's a software issue/bug?  I've tried a few of the recent versions and they all do the same thing, on two different machines with different resolutions, refresh rates and monitors (one is a laptop).  Both installations flicker/flash when the IDEA window is maximized, off to the side, split screen, it doesn't matter.  

This just seems like such an annoying bug/software issue that I cannot believe hasn't been fixed.  Anyone have a solution, the only I can see is rolling back to an old version, perhaps 6103 i saw in another post.  I haven't tried this yet as I would prefer to keep up to date...

I've tried different themes as well, no difference. 

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What OS/JDK do you use? I don't observe this issue on my system.

The best way to get it resolved is to file a proper bug report with all the details and logs and https://youtrack.jetbrains.com/newIssue?project=IDEA.

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Both are windows 10, latest updates. 64bit JDK 12.0.2

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Is that the JDK version you see in the About dialog?

I also have Windows 10. How do I reproduce the issue? Can you share a video showing it?

What video cards/drivers do you use in the systems where this problem occurs?

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I upgraded to the latest Java JDK and still the same issue, didn't think that would be an issue.

One machine is NVIDIA dedicated GTX 1060, the other is an Intel integrated Core i7 Chipset graphics so unlikely the graphics cards/drivers are the issue either.

One had non-full screen gysnc enabled, i tried disabling it, same issue. laptop doesn't have that nor using external monitor. 

Seems like it somehow might be related to toggling between active windows but i can't seem to really isolate and reproduce it that way with consistency. 

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Installing the latest Java JDK from Oracle (13.0.2 in my case) and using the choose runtime plugin solved this issue for me.

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I have exactly same behavior as @Jvarianides described. Having it since 2019.3. Updating to latest 2019.3.3 did not solve the issue.

When I open multiple projects, first opened project works fine, no issues, no flickering, totally fluent workflow.

If I open second in New Window then suddenly the newly opened window is flickering all the time, not responsive, can't type (nor code neither even in terminal tab), nothing happens if I try opening folders in Project tree. It does responds to clicks in main toolbar (File, Edit, etc..)  but no response in working area + Project tree.

If I switch back to first opened window (or leave both windows open each in separate screen and just go over it with mouse) then it responsive as before, open folders/packages in Project tree (regarding of its complexity), freely can code, type in anywhere, responsive to mouse clicks, switching between open files, open new files. Totally responsive behavior.

Going back into "second opened" window, it still flickering, no response to any user input. 

Needless to say that anything else in my PC also very responsive, no overall slowness in machine performance.

My machine specs:

 

This freeze / flickering issue is extremely annoying. I cannot put a finger on specific project where it happens, very randomly. It can even happen on the same project that I opened first if I open it as second project. 

IF I chose to open project in same window "This window", then no problems. Totally fluent work, no freezing or screen flickering.

Also important to notice, it happens even on projects that are not java projects. For example "docker files" projects, "helm  charts" projects. Tried to disable many different plugins but unsuccessfully.

It feels like, threads which run second, third, etc... windows are in starvation by caused by Intellij process it self.

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