Since kernel 3.8 Apple Cinema Display's usb hub spits errors randomly at boot. (their count seems to be random, but the type of the error is always the same) As soon as I disconnect the usb extension cable the errors are gone. Errors journalctl usb 1-2.2: can't set config #1, error -71 hub 2-2:1.0: hub_port_status failed (err = -71) hub 2-2:1.0: hub_port_status failed (err = -71) hub 2-2:1.0: hub_port_status failed (err = -71) hub 2-2:1.0: hub_port_status failed (err = -71) ..... Version Info Linux Y8 3.8.2-1 #1 SMP PREEMPT Mon Mar 4 02:38:59 CET 2013 x86_64 GNU/Linux Gnu C 4.7.2 Gnu make 3.82 binutils 2.23 util-linux 2.22.1 mount debug module-init-tools 11 e2fsprogs 1.42.7 jfsutils 1.1.15 reiserfsprogs 3.6.21 xfsprogs 3.1.8 pcmciautils 018 PPP 2.4.5 Linux C Library 2.15 Dynamic linker (ldd) 2.15 Linux C++ Library 6.0.17 Procps 3.3.5 Net-tools 1.60 Kbd 1.15.3 Sh-utils 8.21 wireless-tools 29 Modules Loaded arc4 rtl8187 eeprom_93cx6 mac80211 cfg80211 hid_apple hid_generic bnep bluetooth rfkill joydev usbhid hid nvidia mperf wacom coretemp kvm_intel snd_hda_codec_realtek kvm snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_page_alloc snd_timer iTCO_wdt snd iTCO_vendor_support ehci_pci lpc_ich i82975x_edac soundcore edac_core i2c_i801 mfd_core evdev psmouse processor asus_atk0110 button serio_raw microcode raid456 async_raid6_recov async_memcpy async_pq async_xor xor async_tx raid6_pq md_mod ext4 crc16 jbd2 mbcache uhci_hcd ehci_hcd usbcore usb_common ata_piix sd_mod ahci libahci libata scsi_mod -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html