[Gllug] What makes a USB device switch back to 1.1?

[John Winters]

And then when I plug in the HDD I get the following in /var/log/syslog


Jul  9 08:15:12 knight kernel: [ 1070.408027] usb 1-7: new high speed 
USB device using ehci_hcd and address 5
Jul  9 08:15:12 knight kernel: [ 1070.568521] usb 1-7: device descriptor 
read/64, error -71
Jul  9 08:15:12 knight kernel: [ 1070.832173] usb 1-7: device descriptor 
read/64, error -71
Jul  9 08:15:13 knight kernel: [ 1071.048026] usb 1-7: new high speed 
USB device using ehci_hcd and address 6
Jul  9 08:15:13 knight kernel: [ 1071.208028] usb 1-7: device descriptor 
read/64, error -71
Jul  9 08:15:13 knight kernel: [ 1071.472537] usb 1-7: device descriptor 
read/64, error -71
Jul  9 08:15:13 knight kernel: [ 1071.688525] usb 1-7: new high speed 
USB device using ehci_hcd and address 7
Jul  9 08:15:13 knight kernel: [ 1071.756713] usb 1-7: device descriptor 
read/8, error -71
Jul  9 08:15:14 knight kernel: [ 1071.924193] usb 1-7: device descriptor 
read/8, error -71
Jul  9 08:15:14 knight kernel: [ 1072.140027] usb 1-7: new high speed 
USB device using ehci_hcd and address 8
Jul  9 08:15:14 knight kernel: [ 1072.580514] usb 1-7: device not 
accepting address 8, error -71
Jul  9 08:15:14 knight kernel: [ 1072.580538] hub 1-0:1.0: unable to 
enumerate USB device on port 7
Jul  9 08:15:14 knight kernel: [ 1072.848029] usb 5-1: new full speed 
USB device using uhci_hcd and address 2
Jul  9 08:15:15 knight kernel: [ 1072.972523] usb 5-1: device descriptor 
read/64, error -71
Jul  9 08:15:15 knight kernel: [ 1073.219468] usb 5-1: not running at 
top speed; connect to a high speed hub
Jul  9 08:15:15 knight kernel: [ 1073.247465] usb 5-1: New USB device 
found, idVendor=0bc2, idProduct=3300
Jul  9 08:15:15 knight kernel: [ 1073.247471] usb 5-1: New USB device 
strings: Mfr=1, Product=2, SerialNumber=3
Jul  9 08:15:15 knight kernel: [ 1073.247475] usb 5-1: Product: Desktop
Jul  9 08:15:15 knight kernel: [ 1073.247478] usb 5-1: Manufacturer: Seagate
Jul  9 08:15:15 knight kernel: [ 1073.247481] usb 5-1: SerialNumber: 
2GHKW1ZX
Jul  9 08:15:15 knight kernel: [ 1073.247626] usb 5-1: configuration #1 
chosen from 1 choice
Jul  9 08:15:15 knight kernel: [ 1073.333012] Initializing USB Mass 
Storage driver...
Jul  9 08:15:15 knight kernel: [ 1073.333177] scsi4 : SCSI emulation for 
USB Mass Storage devices
Jul  9 08:15:15 knight kernel: [ 1073.333312] usbcore: registered new 
interface driver usb-storage
Jul  9 08:15:15 knight kernel: [ 1073.333317] USB Mass Storage support 
registered.
Jul  9 08:15:15 knight kernel: [ 1073.333888] usb-storage: device found at 2
Jul  9 08:15:15 knight kernel: [ 1073.333891] usb-storage: waiting for 
device to settle before scanning
Jul  9 08:15:20 knight kernel: [ 1078.333889] usb-storage: device scan 
complete
Jul  9 08:15:20 knight kernel: [ 1078.336874] scsi 4:0:0:0: 
Direct-Access     Seagate  Desktop          0130 PQ: 0 ANSI: 4
Jul  9 08:15:20 knight kernel: [ 1078.337544] sd 4:0:0:0: Attached scsi 
generic sg3 type 0
Jul  9 08:15:20 knight kernel: [ 1078.342879] sd 4:0:0:0: [sdc] 
3907029168 512-byte logical blocks: (2.00 TB/1.81 TiB)
Jul  9 08:15:20 knight kernel: [ 1078.345855] sd 4:0:0:0: [sdc] Write 
Protect is off
Jul  9 08:15:20 knight kernel: [ 1078.345860] sd 4:0:0:0: [sdc] Mode 
Sense: 2f 08 00 00
Jul  9 08:15:20 knight kernel: [ 1078.345864] sd 4:0:0:0: [sdc] Assuming 
drive cache: write through
Jul  9 08:15:20 knight kernel: [ 1078.353845] sd 4:0:0:0: [sdc] Assuming 
drive cache: write through
Jul  9 08:15:20 knight kernel: [ 1078.353852]  sdc: sdc1
Jul  9 08:15:20 knight kernel: [ 1078.386849] sd 4:0:0:0: [sdc] Assuming 
drive cache: write through
Jul  9 08:15:20 knight kernel: [ 1078.386857] sd 4:0:0:0: [sdc] Attached 
SCSI disk


Cheers,
John
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