Hello
On May 18 19:37 Kelly Price wrote (excerpt):
* First connected to a Pi 3B+: failed with same error as USB 3.0 over xhci. * Connected to a Chromebook with USB 2.0 ports over ehci: works 100% with xsane * Connected to a Pi 2B: works 100% with scanimage * Connected back to the Pi 3B+: now works 100% with scanimage Maybe some initiation has to happen over ehci for it all to work properly. Weird.
Interesting finding! I guess your USB scanner has its own power supply (some USB scanners get power via USB only) and you kept it connected to its power supply while you exchanged its USB connection to the above listed computers? In this case I also think some specific initiation inside the scanner has to happen to make it work. Or did you also disconnect your USB scanner from its power supply so that it was completely switched off each time when you exchanged its USB connection? I am neither a USB expert nor do I use a Raspberry Pi but I am interested what the root cause could be why sometimes some scanners don't work with xhci_hcd, cf. https://en.opensuse.org/SDB:Configuring_Scanners#USB and https://alioth-lists.debian.net/pipermail/sane-devel/2019-January/036525.html and more like that... Kind Regards Johannes Meixner -- SUSE LINUX GmbH - HRB 21284 (AG Nuernberg) GF: Felix Imendoerffer, Mary Higgins, Sri Rasiah -- sane-devel mailing list: [email protected] https://alioth-lists.debian.net/cgi-bin/mailman/listinfo/sane-devel Unsubscribe: Send mail with subject "unsubscribe your_password" to [email protected]
