La commande sudo journalctl -f renvoie:
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3412] device (wlp0s20u13): Activation: starting connection 'ABCDE' (fc852059-d509-4325-bc8b-0db8a8440f24)
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3414] audit: op="connection-activate" uuid="fc852059-d509-4325-bc8b-0db8a8440f24" name="ABCDE" pid=2242 uid=1000 result="success"
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3415] device (wlp0s20u13): state change: disconnected -> prepare (reason 'none', sys-iface-state: 'managed')
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3419] manager: NetworkManager state is now CONNECTING
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3444] device (wlp0s20u13): set-hw-addr: reset MAC address to D0:37:45:0B:32:50 (preserve)
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3502] device (wlp0s20u13): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3505] device (wlp0s20u13): Activation: (wifi) access point 'ABCDE' has security, but secrets are required.
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3505] device (wlp0s20u13): state change: config -> need-auth (reason 'none', sys-iface-state: 'managed')
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3549] device (wlp0s20u13): supplicant interface state: ready -> disabled
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3571] device (wlp0s20u13): state change: need-auth -> prepare (reason 'none', sys-iface-state: 'managed')
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3575] device (wlp0s20u13): state change: prepare -> config (reason 'none', sys-iface-state: 'managed')
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3579] device (wlp0s20u13): Activation: (wifi) connection 'ABCDE' has security, and secrets exist. No new secrets needed.
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3579] Config: added 'ssid' value 'ABCDE'
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3580] Config: added 'scan_ssid' value '1'
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3580] Config: added 'bgscan' value 'simple:30:-70:86400'
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3580] Config: added 'key_mgmt' value 'WPA-PSK WPA-PSK-SHA256 FT-PSK'
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3580] Config: added 'psk' value '<hidden>'
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3588] device (wlp0s20u13): supplicant interface state: disabled -> inactive
août 23 18:43:30 localhost.localdomain NetworkManager[1006]: <info> [1598222610.3670] device (wlp0s20u13): supplicant interface state: inactive -> scanning
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <warn> [1598222635.7385] device (wlp0s20u13): Activation: (wifi) association took too long, failing activation
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <info> [1598222635.7385] device (wlp0s20u13): state change: config -> failed (reason 'ssid-not-found', sys-iface-state: 'managed')
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <info> [1598222635.7388] manager: NetworkManager state is now DISCONNECTED
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <warn> [1598222635.7394] device (wlp0s20u13): Activation: failed for connection 'ABCDE'
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <info> [1598222635.7395] device (wlp0s20u13): supplicant interface state: scanning -> disconnected
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <info> [1598222635.7397] device (wlp0s20u13): state change: failed -> disconnected (reason 'none', sys-iface-state: 'managed')
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <info> [1598222635.7443] device (wlp0s20u13): set-hw-addr: set MAC address to 1A:2E:63:C5:37:6E (scanning)
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <info> [1598222635.7550] device (wlp0s20u13): supplicant interface state: disconnected -> disabled
août 23 18:43:55 localhost.localdomain NetworkManager[1006]: <info> [1598222635.7590] device (wlp0s20u13): supplicant interface state: disabled -> disconnected
j'ai juste modifié mon SSID par 'ABCDE'.
De ce que je comprend, l'association prend trop de temps, il doit donc y avoir un timeout, mais pourquoi...:-?