On Sat, 19 Nov 2005, Matthew Donaldson wrote:
> Hi,
>
> I am running what was a Red Hat 9 system, but I upgraded to kernel 2.6.11 a
> few
> months ago (and updated the required packages to suit).
>
> Now I'm trying to get a Maxtor Personal Storage 3100 external USB hard drive
> to
> work on this machine. (240GB drive, and I need the space badly!) So far the
> only way I can get it to be seen is to remove the ehci_hcd module. Only
> problem: using uhci_hcd I get 1MB/sec transfer rate which isn't very useful.
>
> With the ehci_ucd driver loaded I get these kernel logs when I plug the drive
> in:
>
> ehci_hcd 0000:00:1d.7: GetStatus port 8 status 001803 POWER sig=j CSC CONNECT
> hub 5-0:1.0: port 8, status 0501, change 0001, 480 Mb/s
> hub 5-0:1.0: debounce: port 8: total 100ms stable 100ms status 0x501
> ehci_hcd 0000:00:1d.7: port 8 high speed
> ehci_hcd 0000:00:1d.7: GetStatus port 8 status 001005 POWER sig=se0 PE
> CONNECT
> usb 5-8: new high speed USB device using ehci_hcd and address 4
> ehci_hcd 0000:00:1d.7: devpath 8 ep0in 3strikes
> The drive does not appear in lsusb, and appears not to have been recognised.
>
> I tried the latest 2.6.14 kernel and the same thing happened.
>
> Looking in the source it seems to stem from this call in hub_port_init in
> drivers/usb/core/hub.c, which works its way down to the call to
> qtd_copy_status
> in drives/usb/host/ehci-q.c which prints the "3strikes" messages and returns
> -EPROTO. I don't know enough about USB to go any further.
>
> Anyone know what might be causing this or how it could be worked around? (Or
> has anyone got one of these beasts working?)
Someone else reported a similar problem recently. A suggested fix was to
edit drivers/usb/core/hub.c and change the hub_port_init() routine. Near
the start of that function is a call to hub_port_reset(); just after that
call insert a line saying:
msleep(500);
You may be able to adjust the 500 ms value to something lower. If this
works, let us know how large the value needs to be.
Alan Stern
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