Optical glitch with newer Electron versions

[Torom]

When using Electron 11.3.0, the background is moved along with the figures when they are dragged. I have attached two screenshots where you can see the difference.

release version, Electron 9.4.4:

git master, Electron 11.3.0:

[rooklift]

That's annoying. Looks to only happen on Linux (I can't get this on Windows). I'll try and look into it.

Guess I'll stick to Electron 9 for future releases.

[Torom]

I have tested it with the overall latest version 12.0.1, there the same glitch occurs.

And yes, I forgot to write that. My OS: Manjaro Linux

[rooklift]

I'm out of ideas, but I might make some test repository that contains basically nothing except a piece you can drag around, just to check that a simple case still has it.

[Torom]

I have tested different Electron versions, 9.4.4 is the last version where the glitch does not occur. From Electron 10 onwards it does occur.

[krisan]

@rooklift, FYI, all is ok on MacOS (running from github master + [email protected]). I noticed some flickering, but it can be related to different issue (rendering fenbox/infobox)

@Torom, you can check more by enabling dev console and inspect element (but probably you are already there...).
Comparing side by side between working and not working version can help (if there is issue with html/css)
For example:

[rooklift]

Can you try this: https://github.com/rooklift/electron_draggable_test

[Torom]

I have found one difference between the versions left side with glitch, right side without:

in the table section "text-indent: initial;" is set in the version with the glitch.

[Torom]

Exactly the same behavior:

Electron 11.3.0:

Electron 9.4.4:

[rooklift]

Thanks. It's probably some Electron / Chromium bug on Linux. I wonder if it's known.

[Torom]

I found it:

"On Linux, users have to put --enable-transparent-visuals --disable-gpu in the command line to disable GPU and allow ARGB to make transparent window, this is caused by an upstream bug that alpha channel doesn't work on some NVidia drivers on Linux."

Source

[Torom]

When I set these parameters the glitch disappears. However, I get this error message on startup:

[rooklift]

Try it now.

[Torom]

And that helped. Thank you for your efforts.

Do you have any idea how you would handle this in a release if you want to use Electron >9?

[rooklift]

I deleted some comments from both of us that were wild-goose chases.

[gokberkgunes]

Is there any updates on this issue? It seems like above command-line tags do not work for my case. I looked up online for some information but could not get anything concrete. Nevertheless, I can say that, in my case GPU acceleration does not get turned off.

[rooklift]

I've no new information, no.