HyperHacker, >From your log of ‘kern.log’ in #13, we can find:
- power is insufficient(usb HD. is very power consumptive) in port 8 of root-hub[2], which may cause the endless disconnect&connect of devices 1-8, 1-8.1 and 1-8.2. - port 2 of external hub 1-6 is disabled by hub and mistaken configuration count which is read from device, which may be caused by the bad cable or the bad hub. [1], about devices plugged into external hub 1-6 Jul 31 23:54:37 akira kernel: [812872.280380] hub 1-6:1.0: port 2 disabled by hub (EMI?), re-enabling... Jul 31 23:54:37 akira kernel: [812872.280625] usb 1-6.2: USB disconnect, address 6 Jul 31 23:54:37 akira kernel: [812872.520314] usb 1-6.2: new low speed USB device using ehci_hcd and address 57 Jul 31 23:54:37 akira kernel: [812872.630694] usb 1-6.2: no configurations Jul 31 23:54:37 akira kernel: [812872.630703] usb 1-6.2: can't read configurations, error -22 Jul 31 23:54:37 akira kernel: [812872.720342] usb 1-6.2: new low speed USB device using ehci_hcd and address 58 ...... Aug 4 01:30:24 akira kernel: [1077818.997240] usb 1-6.3: USB disconnect, address 7 Aug 4 01:30:24 akira kernel: [1077819.230291] usb 1-6.3: new low speed USB device using ehci_hcd and address 70 Aug 4 01:30:24 akira kernel: [1077819.350355] input: Logitech USB-PS/2 Optical Mouse as /devices/pci0000:00/0000:00:10.4/usb1/1-6/1-6.3/1-6.3:1.0/input/input6 [2] about devices plugged into external hub 1-8 Aug 5 09:24:07 akira kernel: [1192642.160554] usb 1-8: USB disconnect, address 60 Aug 5 09:24:07 akira kernel: [1192642.160561] usb 1-8.1: USB disconnect, address 61 Aug 5 09:24:07 akira kernel: [1192642.160801] usb 1-8.2: USB disconnect, address 75 Aug 5 09:24:07 akira kernel: [1192642.480041] usb 1-8: new high speed USB device using ehci_hcd and address 103 Aug 5 09:24:07 akira kernel: [1192642.632121] hub 1-8:1.0: USB hub found Aug 5 09:24:07 akira kernel: [1192642.632465] hub 1-8:1.0: 4 ports detected Aug 5 09:24:07 akira kernel: [1192642.910269] usb 1-8.1: new high speed USB device using ehci_hcd and address 104 Aug 5 09:24:08 akira kernel: [1192643.021821] hub 1-8.1:1.0: USB hub found Aug 5 09:24:08 akira kernel: [1192643.022134] hub 1-8.1:1.0: 4 ports detected Aug 5 09:24:08 akira kernel: [1192643.100297] usb 1-8.2: new high speed USB device using ehci_hcd and address 105 Aug 5 09:24:08 akira kernel: [1192643.211086] usb 1-8.2: rejected 1 configuration due to insufficient available bus power Aug 5 09:24:08 akira kernel: [1192643.211094] usb 1-8.2: no configuration chosen from 1 choice Aug 5 11:05:25 akira kernel: [1198720.671418] usb 1-8.2: USB disconnect, address 105 Aug 5 11:27:23 akira kernel: [1200038.200262] usb 1-8.2: new high speed USB device using ehci_hcd and address 106 Aug 5 11:27:23 akira kernel: [1200038.311061] usb 1-8.2: rejected 1 configuration due to insufficient available bus power Aug 5 11:27:23 akira kernel: [1200038.311069] usb 1-8.2: no configuration chosen from 1 choice -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/795626 Title: ehci_hcd fatal error - USB devices randomly crash To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/795626/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
