On 16 Dec 2011, at 22:15, Greg KH wrote: > On Fri, Dec 16, 2011 at 10:00:01PM +0000, Tim Coote wrote: > > No, that doesn't really work given the structure of how USB works, > sorry. Damn. > >> In the short term, is there any way to get uhci_hcd to back off, >> either completely or until the device settles down. Simply putting a >> blacklist entry in /etc/modprobe.d/blacklist.conf does not seem to >> work. >> >> The device seems ok with Windows. >> >> Any help would be gratefully received. >> >> Tim >> >> Dec 16 08:47:01 pluto kernel: [74750.644053] usb 3-2: reset full speed USB device number 54 using uhci_hcd >> Dec 16 08:47:02 pluto kernel: [74750.771372] usb 3-2: device firmware changed >> Dec 16 08:47:02 pluto kernel: [74750.771407] ti_usb_3410_5052: probe of 3-2:1.0 failed with error -5 >> Dec 16 08:47:02 pluto kernel: [74750.771912] usb 3-2: USB disconnect, device number 54 >> Dec 16 08:47:02 pluto kernel: [74750.875053] usb 3-2: new full speed USB device number 55 using uhci_hcd >> Dec 16 08:47:02 pluto kernel: [74751.077370] usb 3-2: New USB device found, idVendor=0451, idProduct=3410 >> Dec 16 08:47:02 pluto kernel: [74751.077379] usb 3-2: New USB device strings: Mfr=1, Product=2, SerialNumber=3 >> Dec 16 08:47:02 pluto kernel: [74751.077386] usb 3-2: Product: TUSB3410 Boot Device >> Dec 16 08:47:02 pluto kernel: [74751.077392] usb 3-2: Manufacturer: Texas Instruments >> Dec 16 08:47:02 pluto kernel: [74751.077398] usb 3-2: SerialNumber: TUSB3410 >> Dec 16 08:47:02 pluto kernel: [74751.080467] ti_usb_3410_5052 3-2:1.0: TI USB 3410 1 port adapter converter detected >> Dec 16 08:47:02 pluto kernel: [74751.080499] ti_usb_3410_5052: probe of 3-2:1.0 failed with error -5 >> Dec 16 08:47:02 pluto kernel: [74751.084511] ti_usb_3410_5052 3-2:2.0: TI USB 3410 1 port adapter converter detected >> Dec 16 08:47:02 pluto kernel: [74751.084821] usb 3-2: TI USB 3410 1 port adapter converter now attached to ttyUSB0 >> Dec 16 08:47:05 pluto kernel: [74754.500080] usb 3-2: USB disconnect, device number 55 >> Dec 16 08:47:05 pluto kernel: [74754.500365] ti_usb_3410_5052_1 ttyUSB0: TI USB 3410 1 port adapter converter now disconnected from ttyUSB0 >> Dec 16 08:47:05 pluto kernel: [74754.500395] ti_usb_3410_5052 3-2:2.0: device disconnected > > So the device went away, that's normal, and should be fine. > > Where are the error messages in the log? Am I misusing the term 'error message'? Sorry. The above log entries cover a 4 second period and include the device disconnecting twice in that time. Note the device numbers that it's coming up as (54 and 55). Between ~0801 and 0847 yesterday, the "...new full speed USB device number..." appeared 767 times in /var/log/messages. I expect that the USB spec does not cover this type of scenario. I think that I'm seeing something similar to this: http://bit.ly/ssHC1Z, which highlights how flakey some device manufacturers are. > > thanks, > > greg k-h thanks for your help. tim-- 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
