Hi, >> [ 1666.291787] usb usb2: usb resume >> [ 1666.291799] ehci_hcd 0000:00:1d.7: resume root hub >> [ 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. Therefore neither of these seems to be faulty. I still believe it's a software problem and I'm looking for a reasonably recent documentation on USB 2.0 linux device driver writing. I've tried some FAQ's but couldn't find information for this particular situation. Regards, Vladimir -- 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
