I don't see anything fixed. The service colord, or more precisely colord-sane, should never send commands to the scanner that lead to the cancellation of USB communication. If necessary, there needs to be a blacklist of devices that fail due to such commands. An average Ubuntu user has no knowledge of the service at all. He cannot be expected to find this error report and then switch off the service using the mask command, apart from the fact that this also switches off the entire colour management for other components in the system.
Translated with DeepL.com (free version) -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to colord in Ubuntu. https://bugs.launchpad.net/bugs/2088294 Title: colord-sane prevents connection to USB scanner Status in colord-gtk: Fix Released Status in colord package in Ubuntu: New Bug description: I have here the slide scanner ‘Braun MultiMag SlideScan 6000’. When I connect it and switch it on, the colord-sane process is started during its approx. 2-minute self-calibration, which then disappears again. After that, the device is no longer listed via lsusb, so presumably the USB port is switched off. Even running the scan application does not prevent this. It is still recognised before the 2 minutes have elapsed: $ lsusb [.....] Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub [.....] Bus 003 Device 008: ID 05e3:0142 Genesys Logic, Inc. Multiple Slides Scanner-3600 A workaround is to stop colord.service before. The only way to connect the scanner permanently and then use it is to connect the scanner to USB only after it's self-calibration. Then colord-sane will no longer be started. However, this obviously prevents the use of colour management. IMHO, it should not be the task of the colour management to switch off USB ports. I attach the USB capture with WireShark. For more details refer https://forum.ubuntuusers.de/topic/farbmanagment-colord-sane-schaltet- usb-port-ab/ To manage notifications about this bug go to: https://bugs.launchpad.net/colord-gtk/+bug/2088294/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
