Long exit delay causes "Do you want to terminate application" dialog

[leamas]

Describe the bug
I have since long observed a rather long delay from closing opencpn until it actually exits. Now, on a RPi clone running XFCE I get the dialog below which makes me file this.

To Reproduce
Steps to reproduce the behavior:

1. Start opencpn
2. Configure two serial connections, one input, one output (not clear to me if load affects this)
3. Click X in top-right window corner
4. Wait around a second
5. See dialog below

Expected behavior
There should be no delay

Screenshots

Desktop (please complete the following information if applicable):

$ uname -a
Linux homsan 6.1.43-rockchip-rk3588 #1.1.8 SMP Fri Feb  2 21:16:10 CST 2024 aarch64 GNU/Linux

That is, Debian 12/Bookworm updated as of "recently" + Rockchip's kernel fork

Smartphone/Tablet (please complete the following information if applicable):

Orange PI 5 (similar to RPi 5, but based on RK3588S -> faster), NVME disk, 8Gb

Additional context

Disabling the serial drivers connections makes the problem go away.

[leamas]

Too late for 5.10? Might have to wait until we do something about #3116.

[transmitterdan]

On slow machines (Rpi) this dialog has been observed for a while. Most users know not to panic. Unless the fix is super simple I think it can wait.

[leamas]

.Unless the fix is super simple I think it can wait.

Agreed

[nohal]

Maybe mention gsettings set org.gnome.mutter check-alive-timeout 60000 or even gsettings set org.gnome.mutter check-alive-timeout 0 somewhere. The default 5 seconds must be a pain with pretty much anything on the ARM SBCs...

[leamas]

hm... This is on X11, no Wayland or mutter. As a quite large part of the Arm users, I guess.