where is module ehci_hcd?

[Werner Schram]

On 01/07/2010 02:21 PM, Karl Auer wrote:
> When mounting external HDDs on my Dell 1720, I get these messages in my
> log, regardless of what port I use:
>
> Jan  7 23:54:54 karl kernel: [14778.504269] usb 5-1: new full speed USB
> device using uhci_hcd and address 4
> Jan  7 23:54:54 karl kernel: [14778.647522] usb 5-1: not running at top
> speed; connect to a high speed hub
>
> I've looked in Google, and the info there suggests that high speed
> devices are handled by a module called ehci_hdc. I have looked through
> my entire system and can find no such module anywhere. Further Googling
> suggests that this functionality is no longer handled by loadable
> modules, but is compiled in. BTW, I know the ports I am using are
> 2.0-capable.
>
> lsusb output looks like this:
>
>
> Bus 002 Device 003: ID 0c45:63e0 Microdia
> Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 006 Device 004: ID 046d:c01a Logitech, Inc. M-BQ85 Optical Wheel Mouse
> Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
> Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
> Bus 004 Device 011: ID 067b:2506 Prolific Technology, Inc.
>    

There are several profilic drivers listed in 
drivers/usb/storage/unusual_devs.h of the kernel source, although that 
doesn't include your device (067b:2506). The file seems to list devices 
that have quirks and need some special attention. The fact that your 
device isn't listed, but similar devices are (067b:2507 is included), 
might imply that your device does need some special attention, but 
doesn't get it. I'm not a kernel developer, so I might be drawing 
completely wrong conclusions here, but it might be worth it to post a 
bug report for it.

Werner