I have the similar issues with USB detection after upgrade to Ubuntu 20.04 on my scanners (HP Laser MFP 135a - smfp backend and HP OfficeJet 4630 - hpaio backend). WIth
The hpaio scanner is detected on USB, but it is not able to communicate (xsane, scanimage, simple-scan). Only scanning by network is working correctly. With HP Laser MFP 135a - smfp, it is not able to detect it on usb port. I would like to investigate this issue further. How did you enabled logs to investigate this issue? -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1871011 Title: USB scanning broken on focal --> hpmud and ippusbxd conflict To manage notifications about this bug go to: https://bugs.launchpad.net/hplip/+bug/1871011/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
