On Fri, Sep 04, 2009 at 12:58:40PM +0200, Oliver Neukum wrote: > Am Donnerstag, 3. September 2009 23:59:02 schrieb Andrew Morton: > > > > usb 3-2: new full speed USB device using uhci_hcd and address 39 > > > usb 3-2: New USB device found, idVendor=20df, idProduct=0001 > > > usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 > > > usb 3-2: Product: Entropy Key > > > usb 3-2: Manufacturer: Simtec Electronics > > > usb 3-2: SerialNumber: OQBuBlg0MTFBVxZD > > > usb 3-2: configuration #1 chosen from 1 choice > > > cdc_acm 3-2:1.0: This device cannot do calls on its own. It is not a > > > modem. cdc_acm 3-2:1.0: ttyACM0: USB ACM device > > > > > > # cat /dev/ttyACM0 > > > cat: /dev/ttyACM0: Input/output error > > > > > > This device works in 2.6.30, but is broken in 2.6.31-rc1 and following. > > Please provide lsusb -v? Anything in the syslog? Please do an strace. > I'd like to know whether it errors in open or read. It was attached to the original bug. http://bugzilla.kernel.org/attachment.cgi?id=22952 >From the strace: .. open("/dev/ttyACM0", O_RDONLY|O_LARGEFILE) = -1 EIO (Input/output error) .. -- Paul Martin <pm@xxxxxxxxxx> -- 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
