[Please send your replies both to the list and to me.] On Sun, 23 Jan 2005, Eddie Cornejo wrote:
> Here's the output when I connect the Disc Stakka > > ----------- Disc Stakka --------------- > > hub 4-0:1.0: state 5 ports 6 chg ffc0 evt 0010 > ehci_hcd 0000:00:03.3: GetStatus port 4 status 001403 POWER sig=k CSC CONNECT > hub 4-0:1.0: port 4, status 0501, change 0001, 480 Mb/s > hub 4-0:1.0: debounce: port 4: total 100ms stable 100ms status 0x501 > ehci_hcd 0000:00:03.3: port 4 low speed --> companion > ehci_hcd 0000:00:03.3: GetStatus port 4 status 003002 POWER OWNER sig=se0 CSC > hub 1-0:1.0: state 5 ports 2 chg fffc evt 0004 > ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [1] = 0x00010301 > CSC LSDA PPS CCS > hub 1-0:1.0: port 2, status 0301, change 0001, 1.5 Mb/s > hub 1-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x301 > ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [1] = 0x00100303 > PRSC LSDA PPS PES CCS > usb 1-2: new low speed USB device using ohci_hcd and address 4 > ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [1] = 0x00100303 > PRSC LSDA PPS PES CCS > usb 1-2: skipped 1 descriptor after interface > usb 1-2: new device strings: Mfr=1, Product=2, SerialNumber=3 > usb 1-2: default language 0x0009 > usb 1-2: Product: Disc Stakka > usb 1-2: Manufacturer: Opdicom > usb 1-2: SerialNumber: 0 > usb 1-2: hotplug > usb 1-2: adding 1-2:1.0 (config #1, interface 0) > usb 1-2:1.0: hotplug > usbhid 1-2:1.0: usb_probe_interface > usbhid 1-2:1.0: usb_probe_interface - got id > drivers/usb/core/file.c: looking for a minor, starting at 96 > hiddev96: USB HID v1.00 Device [Opdicom Disc Stakka] on usb-0000:00:03.0-2 > hub 1-0:1.0: state 5 ports 2 chg fffc evt 0004 > hub 1-0:1.0: state 5 ports 2 chg fffc evt 0004 > ohci_hcd 0000:00:03.0: GetStatus roothub.portstatus [1] = 0x00030300 > PESC CSC LSDA PPS > hub 1-0:1.0: port 2, status 0300, change 0003, 1.5 Mb/s > usb 1-2: USB disconnect, address 4 > usb 1-2: usb_disable_device nuking all URBs > usb 1-2: unregistering interface 1-2:1.0 > drivers/usb/core/file.c: removing 96 minor > drivers/usb/core/file.c: release_usb_class_dev - hiddev0 > usb 1-2:1.0: hotplug > usb 1-2: unregistering device > usb 1-2: hotplug > hub 1-0:1.0: debounce: port 2: total 100ms stable 100ms status 0x300 > > -----------------End Disc Stakka ------------------ > I wasn't able to spot the problem (apart from the device reporting a > serial number of 0?) > > Thanks for the reply, While I'm not an expert on OHCI, it sure looks exactly like the device disconnected itself. If you've got a protocol analyzer you should be able to see if the D+ and D- lines both go low (no D- pullup => disconnection for a low-speed device). As for why this is happening... I have no idea. Noise on the cable, maybe. Or else a bad host controller. Have you tried using your device on a different computer? Alan Stern ------------------------------------------------------- This SF.Net email is sponsored by: IntelliVIEW -- Interactive Reporting Tool for open source databases. Create drag-&-drop reports. Save time by over 75%! Publish reports on the web. Export to DOC, XLS, RTF, etc. Download a FREE copy at http://www.intelliview.com/go/osdn_nl _______________________________________________ [email protected] To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-users
