Bon, j'ai essayé les trucs indiqués sur le lien : ça ne veut toujours pas fonctionner...
En fait, à l'allumage, l'ordi accepte la connexion, mais toutes les pages mettent des heures à s'afficher (ils les affichent quand même) et dès que je lance un yum, la connexion disparait, et impossible de me reconnecter dans le futur. Sauf sur une autre borne, et dans ce cas, aucun problème. (La connexion de mon téléphone fonctionne parfaitement bien, rien à dire, la connexion ne lache pas.)
J'ai été fouillé dans /var/log/messages. Il se trouve que j'ai :
Feb 11 19:59:24 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2/wireless): disconnected during association, asking for new key.
Feb 11 19:59:24 localhost NetworkManager[868]: <info> (wlp0s26u1u2): device state change: config -> need-auth (reason 'supplicant-disconnect') [50 60 8]
Feb 11 19:59:24 localhost NetworkManager[868]: <info> (wlp0s26u1u2): supplicant interface state: disconnected -> inactive
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2) Stage 1 of 5 (Device Prepare) scheduled...
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2) Stage 1 of 5 (Device Prepare) started...
Feb 11 19:59:28 localhost NetworkManager[868]: <info> (wlp0s26u1u2): device state change: need-auth -> prepare (reason 'none') [60 40 0]
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2) Stage 2 of 5 (Device Configure) scheduled...
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2) Stage 1 of 5 (Device Prepare) complete.
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2) Stage 2 of 5 (Device Configure) starting...
Feb 11 19:59:28 localhost NetworkManager[868]: <info> (wlp0s26u1u2): device state change: prepare -> config (reason 'none') [40 50 0]
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2/wireless): connection 'Freebox-AD6349' has security, and secrets exist. No new secrets needed.
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Config: added 'ssid' value 'Freebox-AD6349'
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Config: added 'scan_ssid' value '1'
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Config: added 'key_mgmt' value 'WPA-PSK'
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Config: added 'psk' value '<omitted>'
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Config: added 'proto' value 'WPA RSN'
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2) Stage 2 of 5 (Device Configure) complete.
Feb 11 19:59:28 localhost NetworkManager[868]: <info> Config: set interface ap_scan to 1
Feb 11 19:59:28 localhost NetworkManager[868]: <info> (wlp0s26u1u2): supplicant interface state: inactive -> scanning
Feb 11 19:59:30 localhost kernel: [ 4901.754639] wlp0s26u1u2: authenticate with 00:24:d4:ca:6c:a8
Feb 11 19:59:30 localhost kernel: [ 4901.783589] wlp0s26u1u2: send auth to 00:24:d4:ca:6c:a8 (try 1/3)
Feb 11 19:59:30 localhost kernel: [ 4901.786749] wlp0s26u1u2: authenticated
Feb 11 19:59:30 localhost kernel: [ 4901.787892] wlp0s26u1u2: associate with 00:24:d4:ca:6c:a8 (try 1/3)
Feb 11 19:59:30 localhost NetworkManager[868]: <info> (wlp0s26u1u2): supplicant interface state: scanning -> authenticating
Feb 11 19:59:30 localhost kernel: [ 4901.790988] wlp0s26u1u2: RX AssocResp from 00:24:d4:ca:6c:a8 (capab=0x411 status=0 aid=5)
Feb 11 19:59:30 localhost NetworkManager[868]: <info> (wlp0s26u1u2): supplicant interface state: authenticating -> associating
Feb 11 19:59:30 localhost kernel: [ 4901.799500] wlp0s26u1u2: associated
Feb 11 19:59:30 localhost NetworkManager[868]: <info> (wlp0s26u1u2): supplicant interface state: associating -> 4-way handshake
Feb 11 19:59:33 localhost kernel: [ 4904.897496] wlp0s26u1u2: deauthenticated from 00:24:d4:ca:6c:a8 (Reason: 2)
Feb 11 19:59:33 localhost kernel: [ 4904.939825] cfg80211: Calling CRDA to update world regulatory domain
Feb 11 19:59:33 localhost kernel: [ 4904.944336] cfg80211: World regulatory domain updated:
Feb 11 19:59:33 localhost kernel: [ 4904.944340] cfg80211: (start_freq - end_freq @ bandwidth), (max_antenna_gain, max_eirp)
Feb 11 19:59:33 localhost kernel: [ 4904.944343] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 11 19:59:33 localhost kernel: [ 4904.944346] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 11 19:59:33 localhost kernel: [ 4904.944348] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi, 2000 mBm)
Feb 11 19:59:33 localhost kernel: [ 4904.944350] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 11 19:59:33 localhost kernel: [ 4904.944352] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi, 2000 mBm)
Feb 11 19:59:33 localhost NetworkManager[868]: <warn> Connection disconnected (reason 2)
Feb 11 19:59:33 localhost NetworkManager[868]: <info> (wlp0s26u1u2): supplicant interface state: 4-way handshake -> disconnected
Feb 11 19:59:33 localhost NetworkManager[868]: <info> Activation (wlp0s26u1u2/wireless): disconnected during association, asking for new key.
Feb 11 19:59:33 localhost NetworkManager[868]: <info> (wlp0s26u1u2): device state change: config -> need-auth (reason 'supplicant-disconnect') [50 60 8]
Feb 11 19:59:33 localhost NetworkManager[868]: <info> (wlp0s26u1u2): supplicant interface state: disconnected -> inactive
La reason 2, c'est "Previous authentication no longer valid". Un problème de driver, j'y ai pensé, mais je vois pas trop pourquoi il se connecte sur un périphérique Android, mais pas sur une box... Je vais quand même continuer mes recherches de ce côté là, voir si d'autres ont le même problème sur le modèle de clé Wifi que moi.