id = 2897
title = "Can't boot SeaBIOS based VM when using -display gtk, works fine with vnc or sdl"
state = "closed"
created_at = "2025-03-31T22:08:46.797Z"
closed_at = "2025-04-02T02:33:29.981Z"
labels = ["GUI", "GUI::GTK", "target: i386"]
url = "https://gitlab.com/qemu-project/qemu/-/issues/2897"
host-os = "Debian 12 and Ubuntu 22.04 (and probably everything else)"
host-arch = "x86_64"
qemu-version = "QEMU emulator version 9.2.91  (But... I did just build 10.0.0-rc1)"
guest-os = "n/a"
guest-arch = "n/a"
description = """When using -display gtk, SeaBIOS hangs nondeterministicly. Changing to -display sdl or -display vnc lets it boot."""
reproduce = """1. Run `qemu-system-x86_64 -display gtk` and the VM will not complete BIOS POST.
2. Run `qemu-system-x86_64 -display sdl` and the VM will complete BIOS POST."""
additional = """This ONLY happens with SeaBIOS. Using a UEFI BIOS to boot the VM does not cause this issue. 

I realise this is a crazy bug. I suspect that the only way it could have slipped through testing is because it *requires* human interaction.

There is no difference with using --accel kvm or not, but I have provided the smallest possible command line to duplicate the issue, which is literally just `qemu-system-x86_64 -display gtk`

#"""