Hi Sean, yes, I can do that. Here are some log entries. I suspected the device to disappear right after the "reset" entry. But this is not the case. It might also disappear some seconds after the event.
--- [ 328.405481] usb 1-1.4: new high-speed USB device number 5 using dwc_otg [ 328.537196] usb 1-1.4: New USB device found, idVendor=05e3, idProduct=0605, bcdDevice= 6.0b [ 328.537212] usb 1-1.4: New USB device strings: Mfr=0, Product=1, SerialNumber=0 [ 328.537221] usb 1-1.4: Product: USB2.0 Hub [ 328.538152] hub 1-1.4:1.0: USB hub found [ 328.538449] hub 1-1.4:1.0: 4 ports detected [ 328.675475] usb 1-1.2: reset high-speed USB device number 4 using dwc_otg [ 334.252684] usb 1-1.2: USB disconnect, device number 4 [ 338.085480] usb 1-1.4.3: new high-speed USB device number 6 using dwc_otg [ 338.216965] usb 1-1.4.3: New USB device found, idVendor=04a9, idProduct=190e, bcdDevice= 7.04 [ 338.216981] usb 1-1.4.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 338.216991] usb 1-1.4.3: Product: CanoScan [ 338.217000] usb 1-1.4.3: Manufacturer: Canon [ 348.615487] usb 1-1.4.3: reset high-speed USB device number 6 using dwc_otg [ 781.257336] usb 1-1.4.3: USB disconnect, device number 6 [ 787.105074] usb 1-1.4.3: new high-speed USB device number 7 using dwc_otg [ 787.236590] usb 1-1.4.3: New USB device found, idVendor=04a9, idProduct=190e, bcdDevice= 7.04 [ 787.236620] usb 1-1.4.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 787.236630] usb 1-1.4.3: Product: CanoScan [ 787.236639] usb 1-1.4.3: Manufacturer: Canon [ 791.095083] usb 1-1.4.3: reset high-speed USB device number 7 using dwc_otg [ 981.232218] usb 1-1.4.3: USB disconnect, device number 7 [ 991.254819] usb 1-1.4.3: new high-speed USB device number 8 using dwc_otg [ 991.386331] usb 1-1.4.3: New USB device found, idVendor=04a9, idProduct=190e, bcdDevice= 7.04 [ 991.386348] usb 1-1.4.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [ 991.386358] usb 1-1.4.3: Product: CanoScan [ 991.386367] usb 1-1.4.3: Manufacturer: Canon [ 2101.778329] usb 1-1.4.3: USB disconnect, device number 8 [ 2279.596695] usb 1-1.4: USB disconnect, device number 5 [78022.354395] usb 1-1.2: new high-speed USB device number 9 using dwc_otg [78022.486136] usb 1-1.2: New USB device found, idVendor=05e3, idProduct=0605, bcdDevice= 6.0b [78022.486152] usb 1-1.2: New USB device strings: Mfr=0, Product=1, SerialNumber=0 [78022.486161] usb 1-1.2: Product: USB2.0 Hub [78022.487104] hub 1-1.2:1.0: USB hub found [78022.487402] hub 1-1.2:1.0: 4 ports detected [78022.804366] usb 1-1.2.3: new high-speed USB device number 10 using dwc_otg [78022.935681] usb 1-1.2.3: New USB device found, idVendor=04a9, idProduct=190e, bcdDevice= 7.04 [78022.935690] usb 1-1.2.3: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [78022.935695] usb 1-1.2.3: Product: CanoScan [78022.935699] usb 1-1.2.3: Manufacturer: Canon [78032.084421] usb 1-1.2.3: reset high-speed USB device number 10 using dwc_otg --- HTH Martin On Sat, May 16, 2020 at 7:52 PM Sean Greenslade <[email protected]> wrote: > > On May 15, 2020 11:30:30 AM PDT, Mac Goever <[email protected]> wrote: > >Hoi, > > > >forgot an essential info: The hardware is a Pi 3 Ver 1.2 Hardware > >Revision: a02082 > > > >On Fri, May 15, 2020 at 8:08 PM Mac Goever <[email protected]> wrote: > >> > >> Hi everyone, > >> > >> as I read one can get support on this Mailinglist, I shall give it a > >> shot with my setup. > >> I have a running raspbian (Buster / 10 / PI 3B+) with all packets > >> upgraded every 24h. > >> > >> Sane Version is: > >> -- > >> scanimage -V > >> scanimage (sane-backends) 1.0.27; backend version 1.0.27 > >> -- > >> > >> When connecting a Canon LiDE 120, sane-find-scanner gives me: > >> -- > >> [...] > >> found USB scanner (vendor=0x04a9 [Canon], product=0x190e [CanoScan]) > >> at libusb:001:008 > >> [...] > >> -- > >> which is stable over hours and days. > >> > >> Problem occurs with scanimge -L. About 10 seconds after pugging in > >the > >> scanner, the device gets detected: > >> -- > >> device `genesys:libusb:001:008' is a Canon LiDE 120 flatbed scanner > >> -- > >> After these ~10 seconds it disappears and does not come back. > >> unplugging it and replugging gives another 10 seconds. > >> > >> I suspected a power issue, because the LiDE 120 draws it's power via > >> USB. Unfortunately using a powered hub or a 10Amp power supply does > >> not change anything. The scanner works without a problem connected to > >> an Ubuntu notebook with the same sane Version. Tested with USB Hub > >and > >> without. > >> > >> I already addressed this problem in the IRC and a friendly idler > >> reproduced the issue. > >> > >> Thanks for any efforts > >> > >> Martin > > Can you show the dmesg output from when you first plug the scanner in until > after the scanimage command completes? > > --Sean > >
