Ticket #4082 (closed defect: fixed)
USB pasthrough limited to USB 1.1 speeds
|Reported by:||yrro||Owned by:|
I used Vista Home Basic (SP1) as a host, and conencted a USB mass storage device to the host and configured it to be passed through to the guest.
Transferring files from the disk was limited to 1.1 MB/sec, which is the speed of a USB Full Speed device.
Log messages from the Linux kernel indicate that as far as the guest was concerned, it was a USB 2.0 ("high speed") device:
[ 3.967326] ehci_hcd 0000:00:0b.0: EHCI Host Controller [ 3.967417] ehci_hcd 0000:00:0b.0: new USB bus registered, assigned bus number 1 [ 3.967711] ehci_hcd 0000:00:0b.0: irq 19, io mem 0xf0805000 [ 3.976063] ehci_hcd 0000:00:0b.0: USB 2.0 started, EHCI 1.00, driver 10 Dec 2004 [ 3.976110] usb usb1: configuration #1 chosen from 1 choice [ 3.976126] hub 1-0:1.0: USB hub found [ 3.976130] hub 1-0:1.0: 8 ports detected [ 4.080125] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 [ 4.080127] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 4.080128] usb usb1: Product: EHCI Host Controller [ 4.080129] usb usb1: Manufacturer: Linux 2.6.26-2-amd64 ehci_hcd [ 4.080131] usb usb1: SerialNumber: 0000:00:0b.0
[ 187.700381] usb 1-1: new high speed USB device using ehci_hcd and address 2 [ 188.137721] usb 1-1: configuration #1 chosen from 1 choice [ 188.180643] usb 1-1: New USB device found, idVendor=152d, idProduct=2338 [ 188.180677] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=5 [ 188.180689] usb 1-1: Product: USB to ATA/ATAPI Bridge [ 188.180700] usb 1-1: Manufacturer: JMicron [ 188.180711] usb 1-1: SerialNumber: C05762222222