Fyne x11 apps crash on display idle->wake change #5899
Description
Checklist
- I have searched the issue tracker for open issues that relate to the same problem, before opening a new one.
- This issue only relates to a single bug. I will open new issues for any other problems.
Describe the bug
At least on KDE's X wayland stuff, I have noticed that apps which have a visible window and a system tray icon when a display goes to an idle state will crash with something similar to below:
X Error of failed request: BadRRCrtc (invalid Crtc parameter)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 20 (RRGetCrtcInfo)
Crtc id in failed request: 0x53e
Serial number of failed request: 684
Current serial number in output stream: 684
I have noticed this in my own apps and it has also been reported supersonic: dweymouth/supersonic#412
As reported in the supersonic issue, it seems to be caused by glfw. I have a manually patched ./vendor/github.com/go-gl/glfw/v3.3/glfw/glfw/src/x11_monitor.c which seems to help the situation, but doesn't fully resolve it (likely my patch isn't fully covering all the possible branches).
How to reproduce
- Run the fyne demo
- After it starts select the progress bar demo
- Lock screen / wait for idle to happen
- Wake screen to find crash
go run fyne.io/demo@latest
go: downloading fyne.io/demo v1.6.0
go: downloading fyne.io/fyne/v2 v2.6.0
go: downloading github.com/alecthomas/chroma/v2 v2.15.0
go: downloading github.com/dlclark/regexp2 v1.11.4
2025/08/14 09:45:33 Lifecycle: Started
2025/08/14 09:45:33 Lifecycle: Entered Foreground
2025/08/14 09:45:49 Lifecycle: Exited Foreground
X Error of failed request: BadRRCrtc (invalid Crtc parameter)
Major opcode of failed request: 140 (RANDR)
Minor opcode of failed request: 20 (RRGetCrtcInfo)
Crtc id in failed request: 0x55b
Serial number of failed request: 1299
Current serial number in output stream: 1299
exit status 1
Screenshots
No response
Example code
See demo
Fyne version
2.6.0
Go compiler version
1.24.5
Operating system and version
NixOS unstable
Additional Information
No response