a game with ebiten.SetRunnableOnUnfocused(false) doesn't show a window on ChromeOS Linux environment

[divVerent]

Ebitengine Version

813e3b28afb154a66bd8d7ffd91aadbd11545a6b

Operating System

• [ ] Windows
• [ ] macOS
• [X] Linux
• [ ] FreeBSD
• [ ] OpenBSD
• [ ] Android
• [ ] iOS
• [ ] Nintendo Switch
• [ ] PlayStation 5
• [ ] Xbox
• [ ] Web Browsers

Go Version (go version)

go version go1.23.0 linux/amd64

What steps will reproduce the problem?

Apply this change:

diff --git a/examples/keyboard/main.go b/examples/keyboard/main.go
index 3f5b00206..612bf5865 100644
--- a/examples/keyboard/main.go
+++ b/examples/keyboard/main.go
@@ -102,6 +102,7 @@ func (g *Game) Layout(outsideWidth, outsideHeight int) (int, int) {
 }

 func main() {
+       ebiten.SetRunnableOnUnfocused(false)
        ebiten.SetWindowSize(screenWidth*2, screenHeight*2)
        ebiten.SetWindowTitle("Keyboard (Ebitengine Demo)")
        if err := ebiten.RunGame(&Game{}); err != nil {

Then run the "keyboard" example.

What is the expected result?

Keyboard window comes up.

What happens instead?

Program hangs "forever".

Anything else you feel useful to add?

Issue is specific to ChromeOS. It happens neither on Linux/X.org nor on Linux/Wayland/XWayland.

I have not tested, but it might be reproducible if one finds a way to run ChromeOS's "sommelier" server on desktop Linux too.

[hajimehoshi]

Confirmed.

[hajimehoshi]

Another reproducible case is

go run ./examples/windowsize/ -runnableonunfocused=false

[hajimehoshi]

99ffe09b63e0d906cc1f502c24f4d2325e6cc09d should fix the issue.

[divVerent]

Thank you!

[hajimehoshi]

@divVerent Do you want me to cherry-pick this fix to the stable branch?

[divVerent]

Not needed for me in particular - if it'll be in the next major release, this change seems self contained enough that I can keep cherrpicking it on top of the stable releases.

Having said that - it's probably a good idea to merge it into Ebitengine stable, simply because it makes Chrome OS support more reliable in general. Not sure if this also fixes operation with some specific X11 window managers.

[hajimehoshi]

Well, then I will not merge the fix, since I cannot say that any changes are 100% safe and the fix itself might cause another issue. Thanks!