J'ai installé très récemment Debian 5.0.7 puis j'ai fais quelques mises à jour (j'utilise les dépôts testing et backports).
Depuis quelques temps, le système remplit des logs au kilomètre dans /var/log/syslog à propos de la gestion USB:
Jan 13 11:39:39 euphorie kernel: [92249.792025] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:39 euphorie kernel: [92249.808996] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:39 euphorie kernel: [92249.928921] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:40 euphorie kernel: [92250.031613] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:40 euphorie kernel: [92250.143437] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:40 euphorie kernel: [92250.160539] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:40 euphorie kernel: [92250.280343] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:40 euphorie kernel: [92250.383065] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:40 euphorie kernel: [92250.494895] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:40 euphorie kernel: [92250.511961] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:40 euphorie kernel: [92250.631763] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:40 euphorie kernel: [92250.734527] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:40 euphorie kernel: [92250.846374] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:40 euphorie kernel: [92250.863382] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:40 euphorie kernel: [92250.983185] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:41 euphorie kernel: [92251.085988] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:41 euphorie kernel: [92251.085996] hub 1-0:1.0: unable to enumerate USB device on port 3
Jan 13 11:39:41 euphorie kernel: [92251.086001] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:43 euphorie kernel: [92253.833773] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:43 euphorie kernel: [92253.850836] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:43 euphorie kernel: [92253.970639] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:44 euphorie kernel: [92254.073406] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:44 euphorie kernel: [92254.187101] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:44 euphorie kernel: [92254.206254] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:44 euphorie kernel: [92254.326178] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:44 euphorie kernel: [92254.428863] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:44 euphorie kernel: [92254.540717] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:44 euphorie kernel: [92254.557797] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:44 euphorie kernel: [92254.678597] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:44 euphorie kernel: [92254.780326] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:44 euphorie kernel: [92254.895511] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:44 euphorie kernel: [92254.909466] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:45 euphorie kernel: [92255.029147] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:45 euphorie kernel: [92255.131818] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:45 euphorie kernel: [92255.131825] hub 1-0:1.0: unable to enumerate USB device on port 3
Jan 13 11:39:45 euphorie kernel: [92255.131828] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:47 euphorie kernel: [92257.827646] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:47 euphorie kernel: [92257.844765] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:47 euphorie kernel: [92257.964571] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:48 euphorie kernel: [92258.067278] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:48 euphorie kernel: [92258.179105] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:48 euphorie kernel: [92258.196410] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:48 euphorie kernel: [92258.315981] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:48 euphorie kernel: [92258.418736] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:48 euphorie kernel: [92258.530567] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:48 euphorie kernel: [92258.547584] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:48 euphorie kernel: [92258.667536] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:48 euphorie kernel: [92258.770206] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:48 euphorie kernel: [92258.882039] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:48 euphorie kernel: [92258.899147] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:49 euphorie kernel: [92259.018962] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:49 euphorie kernel: [92259.121670] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:49 euphorie kernel: [92259.121678] hub 1-0:1.0: unable to enumerate USB device on port 3
Jan 13 11:39:49 euphorie kernel: [92259.121685] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:51 euphorie kernel: [92261.825752] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:51 euphorie kernel: [92261.842546] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:51 euphorie kernel: [92261.962350] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:52 euphorie kernel: [92262.065138] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:52 euphorie kernel: [92262.180424] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:52 euphorie kernel: [92262.195469] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:52 euphorie kernel: [92262.313895] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:52 euphorie kernel: [92262.416600] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:52 euphorie kernel: [92262.528429] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:52 euphorie kernel: [92262.545513] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:52 euphorie kernel: [92262.665316] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:52 euphorie kernel: [92262.768059] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:52 euphorie kernel: [92262.879890] usb 1-3: new high speed USB device using xhci_hcd and address 0
Jan 13 11:39:52 euphorie kernel: [92262.896935] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:53 euphorie kernel: [92263.016738] usb 1-3: device descriptor read/8, error -61
Jan 13 11:39:53 euphorie kernel: [92263.119524] hub 1-0:1.0: cannot disable port 3 (err = -32)
Jan 13 11:39:53 euphorie kernel: [92263.119532] hub 1-0:1.0: unable to enumerate USB device on port 3
Jan 13 11:39:53 euphorie kernel: [92263.119536] hub 1-0:1.0: cannot disable port 3 (err = -32)