Vladimir Komendantsky wrote: > The device is USB 1.1 compliant and works well in Linux. However, 12 > Mb/s is an insufficient speed, Insufficient for what? MIDI and full duplex audio with 16 bits at 44.1 kHz work fine with full speed. > which is solved in Windows by manufacturer device drivers. The only reason for those drivers is that Microsoft's drivers don't support ASIO. >>> [ 1666.412345] ehci_hcd 0000:00:1d.7: port 2 full speed --> companion >> >> This line indicates that your device is not completing the high-speed >> handshake and thus is failing to connect at high speed. There is a >> hardware problem either in the device or in the EHCI controller or in >> the connecting cable. > > The fact is that the device does work at high speed in Windows with > the same cable and controller. Is that "high speed" or "USB 2.0"? When you tell the Device Manager to show devices by connection, to which host controller is the device connected? > I still believe it's a software problem If the device supports high speed (which I don't believe), then this can only be enabled with some vendor-specific command. Documentation for that would be available (or not) only from M-Audio. Regards, Clemens -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
