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Session prereqs: libvirt group membership when libvirt is installed

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The error CHANGED on the VM: 'no polkit agent' -> 'access denied by
policy' — the agent unit works; polkit now denies because the user is
not in the libvirt group (fresh run without picking QEMU from the menu,
or no re-login after the pick).

install_session_prereqs now adds the user to the libvirt group whenever
libvirt is installed (idempotent via id -nG check), decoupled from the
advanced-menu choice. Applies after re-login.
This commit is contained in:
Pathfinder
2026-10-27 15:14:22 +01:00
parent 0814c5bde7
commit e99c60a073
1 changed files with 11 additions and 0 deletions
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lib/session.sh
+11
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@@ -125,4 +125,15 @@ UNIT
sudo ln -sf ../polkit-agent.service \ sudo ln -sf ../polkit-agent.service \
/etc/systemd/user/graphical-session.target.wants/polkit-agent.service /etc/systemd/user/graphical-session.target.wants/polkit-agent.service
fi fi
# libvirt group: members manage qemu:///system without a polkit prompt.
# Without this, virt-manager dies on "access denied by policy" even with
# a working agent (VM-proven). Idempotent; applies after re-login.
if pkg_installed libvirt; then
local real_user="${SUDO_USER:-$USER}"
if ! id -nG "$real_user" 2>/dev/null | grep -qw libvirt; then
info "Adding $real_user to the libvirt group (re-login to apply)..."
sudo usermod -aG libvirt "$real_user"
fi
fi
} }