[sane-devel] Color managment `colord-sane` on Ubuntu 20.04 switches off USB-Port

[Ulf Zibis]

Am 02.11.24 um 17:36 schrieb m. allan noah:
>
> You have made some assumptions here-
>
> I don't see evidence that the port is switched off. This could just as easily be the device getting into a state where it no longer talks to the USB, perhaps because it was sent a command it does not understand. What does `dmesg` say after the calibration is over?
>
> Also, we are not the authors of colord-sane, that comes with colord. Can you get it to show you some logging of what it is doing? If you disable or uninstall it, does the behavior change?

Much thanks for your valuable info.

Here is what dmesg reports (the first tries are with `systemctl stop colord.service`, the later with running `colord`):
[87125.861151] usb 3-6: new high-speed USB device number 18 using xhci_hcd
[87125.989927] usb 3-6: New USB device found, idVendor=05e3, idProduct=0142, bcdDevice= 3.02
[87125.989945] usb 3-6: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[98781.386852] usb 3-6: USB disconnect, device number 18
[98796.252134] usb 3-6: new high-speed USB device number 19 using xhci_hcd
[98796.380880] usb 3-6: New USB device found, idVendor=05e3, idProduct=0142, bcdDevice= 3.02
[98796.380898] usb 3-6: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[99115.678412] usb 3-6: usbfs: USBDEVFS_CONTROL failed cmd vuescan rqt 64 rq 12 len 1 ret -110
[99145.886851] usb 3-6: usbfs: USBDEVFS_CONTROL failed cmd vuescan rqt 64 rq 12 len 1 ret -110
[99189.476695] usb 3-6: USB disconnect, device number 19
[100425.457981] usb 3-6: new high-speed USB device number 20 using xhci_hcd
[100425.586625] usb 3-6: New USB device found, idVendor=05e3, idProduct=0142, bcdDevice= 3.02
[100425.586635] usb 3-6: New USB device strings: Mfr=0, Product=0, SerialNumber=0
[100515.797474] usb 3-6: reset high-speed USB device number 20 using xhci_hcd
[100515.912152] usb 3-6: device descriptor read/64, error -71
[100516.130134] usb 3-6: device descriptor read/64, error -71
[100516.980086] usb 3-6: USB disconnect, device number 20

-Ulf

--
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