Re: [LAU] USB on ThinkPad T520

From: Clemens Ladisch <clemens@email-addr-hidden>
Date: Sun May 13 2012 - 12:06:25 EEST

plutek wrote:
> 00:1a.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #2 (rev 04)
> 00:1d.0 USB Controller: Intel Corporation Cougar Point USB Enhanced Host Controller #1 (rev 04)

As Karsten said, these controllers use a different driver.
But in theory, this shouldn't have much of a difference regarding latency.

There have been fixes recently. Try updating the kernel.

> 16: 18305 0 0 0 IO-APIC-fasteoi mmc0, ehci_hcd:usb1, mei
> 23: 60179021 0 0 0 IO-APIC-fasteoi ehci_hcd:usb2

Okay, I can guess which one the audio device is connected to ...

> 0d:00.3 FireWire (IEEE 1394): Ricoh Co Ltd FireWire Host Controller (rev 04)
> 41: 573 0 0 0 PCI-MSI-edge firewire_ohci

The Ricoh controller doesn't work with MSI. If you ever want to use it,
you must update the kernel.

Regards,
Clemens
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Received on Sun May 13 12:15:02 2012

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