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+id = 2978
+title = "Qemu assertion issue"
+state = "opened"
+created_at = "2025-05-22T15:27:00.476Z"
+closed_at = "n/a"
+labels = ["workflow::Needs Info"]
+url = "https://gitlab.com/qemu-project/qemu/-/issues/2978"
+host-os = "Ubuntu 24.04 LTS"
+host-arch = "x86_64"
+qemu-version = "QEMU emulator version 8.2.2 (Debian 1:8.2.2+ds-0ubuntu1.6)"
+guest-os = "Custom OS (OxizeOS)"
+guest-arch = "x86"
+description = """This issue is **not caused by my OS**, as it runs perfectly under VMware and other emulators.
+
+However, when using QEMU, the emulator sometimes randomly **crashes or aborts** during boot or early execution. The crash is **inconsistent** — sometimes it runs, sometimes it fails immediately.
+
+QEMU fails with an **assertion failure** in `qemu_mutex_lock_iothread_impl`"""
+reproduce = """Unfortunately, I do not know exactly what causes this issue. It may be specific to my system or configuration.
+
+1. 
+2."""
+additional = """Qemu stdout:
+
+```
+ERROR:system/cpus.c:504:qemu_mutex_lock_iothread_impl: assertion failed: (!qemu_mutex_iothread_locked()) Bail out! ERROR:system/cpus.c:504:qemu_mutex_lock_iothread_impl: assertion failed: (!qemu_mutex_iothread_locked()) ./run: line 3: 3544 Aborted (core dumped)
+```
+
+Command line:
+```
+ qemu-system-x86_64 -debugcon file:OxizeOS.log -drive file=output/OxizeOS.hdd,format=raw -serial stdio
+```"""