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Qubes OS release

Qubes OS r4.3 rc1 - Only Fedora 43 Template (at this moment).

Brief summary

Python 3.14 will be the default for Fedora 43. It deprecates calling asyncio.get_event_loop() if there is no current event loop (details here).

This will break a bunch of Qubes OS tools. It was found 1st in qvm-start-daemon for a sys-audio qube. But the same error might be present in Qui Widget tools (if used in a Fedora 43 based sys-gui*). Or Qube Manager and many other corners.

Steps to reproduce

In Python 3.14 in Fedora 43 try:

import asyncio
loop = asyncio.get_event_loop()

Observe the error and compare with previous Python version in older templates.

Expected behavior

Qubes tools which depend on asyncio should initialize the event loop with:

loop = new_event_loop()
asyncio.set_event_loop(loop)

before calling asyncio.get_event_loop()

Actual behavior

A list of tools which should be fixed to allow running on Fedora 43 (list will be updated)

• qubes-core-admin-client: qvm-start-daemon, qvm-shutdown, qvm-template (post process), qvm-backup
• qubes-app-linux-pdf-converter: Client & Server
• qubes-desktop-linux-manager: Qui Clipboard, Qui Device Widget, Qui Domains, Qui Updates, Updater (summary page), qubes-device-agent.py
• qubes-gui-daemon: icon-reciever
• qubes-gui-agent-linux: icon-sender (most probably does not require a fix).
• qubes-doc: Deveoper -> Services -> qrexec-socket-services.rst
• qubes-desktop-linux-menu: AppMenu and desktop_file_manager.py
• qubes-app-shutdown-idle
• qubes-core-admin Lot's of components but lower priority since dom0 is currently stuck on Fedora 41
• qubes-core-qrexec: qrexec/policy/utils.py, tools/qrexec_policy_agent.py not needed
• qubes-app-linux-split-gpg2
• qubes-builderv2

Additional information

Related: #10102