Suddenly, my WiFi dongle is no longer operational.  I tried swapping the 
dongle but no change.

Command inxi -SN reports :
  System:
    Host: carros Kernel: 6.12.69+deb13-amd64 arch: x86_64 bits: 64
    Desktop: Xfce v: 4.20.1 Distro: Debian GNU/Linux 13 (trixie)
  Network:
    Device-1: Intel 82579V Gigabit Network driver: e1000e
    Device-2: Senao RTL8188S WLAN Adapter driver: N/A type: USB

The hardware of my WiFi USB adapter is detected, but the operating system 
ignores it.  For example, command rfkill reports (débloqué = not blocked) :
  ID TYPE      DEVICE     SOFT     HARD
   0 bluetooth hci0   débloqué débloqué 

Command journalctl --system | grep -i Activation used to show :
  mars 14 17:23:35 carros NetworkManager[539904]: <info>  [1773505415.8869] 
  device (wlx00026f7e912a): Activation: successful, device activated.

but now I get
  mars 15 14:54:31 carros NetworkManager[539904]: <info>  [1773582871.1099] 
    dhcp4 (wlx00026f7e912a): activation: beginning transaction (timeout in 45 
seconds)
  mars 15 14:54:31 carros dbus-daemon[675]: [system] Activation via systemd 
    failed for unit 'dbus-org.freedesktop.nm-dispatcher.service': Refusing 
activation, 
    D-Bus is shutting down.
  mars 15 14:54:31 carros systemd[1]: Closed avahi-daemon.socket - Avahi 
    mDNS/DNS-SD Stack Activation Socket.

Command nmcli device reports
  DEVICE  TYPE      STATE                  CONNECTION         
  eno1    ethernet  connecté               Wired connection 1 
  lo      loopback  connecté (en externe)  lo 

Device wlx... has disappeared.  Any suggestion for restoring it would be very 
welcome.

Roger

PS : In case you wondered :
   rprice@carros ~ cat /etc/apt/sources.list | grep -v "#"
   deb http://deb.debian.org/debian/ trixie main non-free-firmware
   deb-src http://deb.debian.org/debian/ trixie main non-free-firmware
   deb http://security.debian.org/debian-security trixie-security main 
non-free-firmware
   deb-src http://security.debian.org/debian-security trixie-security main 
non-free-firmware
   deb http://deb.debian.org/debian/ trixie-updates main non-free-firmware
   deb-src http://deb.debian.org/debian/ trixie-updates main non-free-firmware

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