Flickering and rendering issues (intel) about picom HOT 24 CLOSED

Can you confirm whether backend = "xrender" works fine?

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And, if you are able to build from source and run, can you test commit 56f7dd3, and see if that works?

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Can you confirm whether backend = "xrender" works fine?

I get no artifacts with my config and backend = "xrender"

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And, if you are able to build from source and run, can you test commit 56f7dd3, and see if that works?

I'm sorry but I'm confused, how do you build 56f7dd3? It does not contain meson.build files.

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@jeLee6gi That commit is before the meson conversion. You build it by running make.

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Oh ...

I ran 56f7dd3 with my original config using the glx backend and I don't get any artifacts.

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I have some guesses. Can you record a trace of compton --config /dev/null --backend glx use apitrace? Thanks.

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And if you can, can you record a trace of compton v2 as well? So we can compare.

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I made a mistake earlier, 56f7dd3 still has artifacts for me. I don't get flickering but windows are not redrawn. I accidentally ran it with the xrender backend before, my bad.

Here are the logs for v2 and v3, I tried to keep them short, I hope they are long enough

compton_v2.trace.log
compton_v3.trace.log

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@jeLee6gi As long as the flickering happened when you were capturing the trace, it is good.

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I don't get flickering but windows are not redrawn.

That seems to be a different issue. I will take that as 56f7dd3 fixes the flickering, but has another bug (which is likely to have been fixed by now).

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Oh BTW, I just remembered two things.

1. Have you tried enabling TearFree as described here: https://wiki.archlinux.org/index.php/intel_graphics#Tearing ?
2. Have you tried the modesetting driver instead of xf86-video-intel? (not likely to help, try only if you have time to waste).

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Looking at my xorg.conf again was a good lead, I had modified mine according to https://wiki.archlinux.org/index.php/intel_graphics#Tearing and https://wiki.archlinux.org/index.php/intel_graphics#DRI3_issues so it looked like this.

Section "Device"
  Identifier    "Intel Graphics"
  Driver        "intel"
  Option        "DRI" "2"
  Option        "TearFree" "true"
EndSection

I took out the fallback to DRI 2 and it seems like it fixes the visual glitches and redraw issues with compton v3 on my end. I do see the problems I had with DRI 3 again though, mostly redraw problems when resizing windows but they are only a minor annoyance.

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Hmmm. So you trace of v2 and v3 looks basically the same. Plus using DRI 2 instead of DRI 3 fixes the problem. I will (tentatively) call this a hardware/driver problem.

Instead of fiddling with how compton uses opengl to find a workaround, I suggest you raise this issue with intel developers, and see if they have better ideas. (And you should report the DRI 3 issue too)

I will keep this issue open in the meantime.

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I agree, it sounds like a driver problem now. Thank you for helping me debug this issue, it works for me and from my side this issue is resolved. If I learn more about this issue I will reply in this thread.

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I use integrated intel graphics too, I don't find any issue, no tearing at all.

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Integrated intel here as well, using modesetting driver instead of intel. No tearing, vsync works like a charm, also i <3 your config :)

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@osleg : any benefits of using modesettings driver over intel?

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@osleg : I have hd630 but enable modesetting driver in /etc/x11... causing much tearing than intel, and according to packages page of archlinux, latest update of xf86-video-intel is 26-Oct-2018: https://www.archlinux.org/packages/extra/x86_64/xf86-video-intel/

Don't know what to think, even upsteam stop contribute, it seems opensource project and still something relevant and work for me.

@jeLee6gi : I have to admit, your config is very good, but you may need blank_mode=0 to speed up.

@yshui : Is Lee config is similar to default? If not how to get default options list of compton?

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Yeah tearimg happens, there are some keys to fix that but tbh the only thing I use to prevent tearing is compton and it works like a charm 😉

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@jeLee6gi Hi, can you test the dri2-hack branch, see if it works without DRI3?

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Your hack fixes the flickering under DRI2 on my end too, thanks for investigating and fixing it so quickly!

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Thank @jlindgren90 too, they helped immensely

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