On Tue, 20 Dec 2005 [EMAIL PROTECTED] wrote: > Dear Alan, > > Thanks for the reply: > > In general the Genesys Logic adapters seem to work okay. The sort of > > problems you're seeing are usually caused by poor USB cables, or a bad > >cable/connector combination. > > I will check for USB cables and connectors. Still I have some concern > regarding Genesys Logic when I see the report on this page: > http://www.qbik.ch/usb/devices/showdev.php?id=3015 > > I also have separate power supply for CD-RW through the Adapter but the above > feedback suggest that I may require USB powered hub. I am connecting > presently to whatever ports I have on the Laptop and tried all the 3 with > same result. Is separate USB powered hub essential?
I don't know. From the error reports it's hard to tell exactly what's going wrong. It could be a power issue, or it could be something else. For instance, adding a hub will change the signal-to-noise ratio of the USB data signals and might also affect clock jitter. > You wrote that the first error is due to poor cable/connectors what about > this one: > localhost kernel [4294986.183000] usb 3-4: device not accepting address 4, > error -71 > > and this one: > localhost kernel [4295122.839000] usb 3-4: USB disconnect, address 6 Those could be caused by bad cables or by something else. > I would also like to know about what is happening here: > localhost kernel [4295126.760000] usb 3-4: new high speed USB device using > ehci_hcd and address 11 > localhost kernel [4295127.164000] Initializing USB Mass Storage driver... > localhost kernel [4295127.168000] scsi0 : SCSI emulation for USB Mass Storage > devices > localhost kernel [4295127.172000] usb-storage: device found at 11 > localhost kernel [4295127.172000] usb-storage: waiting for device to settle > before scanning > localhost kernel [4295127.172000] usbcore: registered new driver usb-storage > localhost kernel [4295127.172000] USB Mass Storage support registered. > localhost kernel [4295127.340000] atkbd.c: Unknown key pressed (translated > set 2, code 0xaa on isa0060/serio0). > localhost kernel [4295127.340000] atkbd.c: Use 'setkeycodes e02a <keycode>' > to make it known. > localhost kernel [4295127.474000] atkbd.c: Unknown key released (translated > set 2, code 0xaa on isa0060/serio0). > localhost kernel [4295127.474000] atkbd.c: Use 'setkeycodes e02a <keycode>' > to make it known. > localhost kernel [4295130.589000] usb 3-4: USB disconnect, address 11 Are you talking about the atkbd.c messages? Those have nothing to do with usb-storage; they refer to your keyboard. The last message, about the disconnect, means exactly what it says: the device was disconnected, either physically (by unplugging the cable) or electronically. Alan Stern ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://ads.osdn.com/?ad_id=7637&alloc_id=16865&op=click _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
