I accidentally noticed this error written to the warn log on my Dell R200's when the machines booted up after latest kernel update. Google doesn't have this exact error, only a few with differently named devices, but all seem to have to do with USB. Could this be a bug? Didn't see this error on other machines with more than one USB port, though.
Jun 26 22:59:07 c4 kernel: kobject_add failed for usbdev1.2_ep81 with - EEXIST, don't try to register things with the same name in the same directory. Jun 26 22:59:07 c4 kernel: Jun 26 22:59:07 c4 kernel: Call Trace: Jun 26 22:59:07 c4 kernel: [<ffffffff803457a0>] kobject_add+0x166/0x191 Jun 26 22:59:07 c4 kernel: [<ffffffff803af893>] device_add+0x85/0x372 Jun 26 22:59:07 c4 kernel: [<ffffffff803f03f6>] usb_create_ep_files+0x137/0x19a Jun 26 22:59:07 c4 kernel: [<ffffffff80478406>] klist_add_tail+0x35/0x42 Jun 26 22:59:07 c4 kernel: [<ffffffff803efe92>] usb_create_sysfs_intf_files+0x80/0x93 Jun 26 22:59:07 c4 kernel: [<ffffffff803ed710>] usb_set_configuration+0x3aa/0x3d9 Jun 26 22:59:07 c4 kernel: [<ffffffff803e9408>] usb_new_device+0x253/0x2c4 Jun 26 22:59:07 c4 kernel: [<ffffffff803ea554>] hub_thread+0x74e/0xb11 Jun 26 22:59:07 c4 kernel: [<ffffffff8029e04c>] autoremove_wake_function+0x0/0x2e Jun 26 22:59:07 c4 kernel: [<ffffffff803e9e06>] hub_thread+0x0/0xb11 Jun 26 22:59:07 c4 kernel: [<ffffffff8029de34>] keventd_create_kthread+0x0/0xc4 Jun 26 22:59:07 c4 kernel: [<ffffffff80233dee>] kthread+0xfe/0x132 Jun 26 22:59:07 c4 kernel: [<ffffffff80260b2c>] child_rip+0xa/0x12 Jun 26 22:59:07 c4 kernel: [<ffffffff8029de34>] keventd_create_kthread+0x0/0xc4 Jun 26 22:59:07 c4 kernel: [<ffffffff80233cf0>] kthread+0x0/0x132 Jun 26 22:59:07 c4 kernel: [<ffffffff80260b22>] child_rip+0x0/0x12
Kai