http://bugzilla.suse.com/show_bug.cgi?id=955079 http://bugzilla.suse.com/show_bug.cgi?id=955079#c2 Johannes Meixner <jsmeix@suse.com> changed: What |Removed |Added ---------------------------------------------------------------------------- Priority|P5 - None |P3 - Medium URL| |http://lists.alioth.debian. | |org/pipermail/sane-devel/20 | |15-November/034120.html Component|Basesystem |Other CC| |jsmeix@suse.com Found By|--- |Development Assignee|bnc-team-screening@forge.pr |jsmeix@suse.com |ovo.novell.com | Summary|usb scanner is not found |sane-backends: USB scanner |anymore |no longer found reilably | |(about every 2nd "scanimage | |-L" fails) OS|Linux |SUSE Other --- Comment #2 from Johannes Meixner <jsmeix@suse.com> --- The issue is not caused by openSUSE patches for sane-backends (because there are no such patches for sane-backends). When the root cause is in sane-backends then it is a SANE upstrem issue which you already reported in your "regression in sane-backends 1.0.25, AGFA Snapscan 1212U_2 not found" mail thread at sane-devel@lists.alioth.debian.org But the root cause could also be in the kernel or in libusb. When your scanner is connected at a USB port where the kernel module xhci_hcd is used (see "lsusb -t") then it is likey a duplicate of bug#856794. Details: In general "sometimes works / sometimes fails" indicates that the root cause is somehow hardware related where "hardware" means the actual computer hardware plus the computer's built-in firmware (i.e. BIOS or UEFI) and "hardware related" means computer hardware plus firmware plus Linux kernel driver plus low-level hardware related software (e.g. libusb). There are currently issues with scanners at USB ports when the kernel module "xhci" is used as kernel driver. When "lsusb -t" shows "Driver=xhci_hcd" for the USB bus and port where the USB scanner is connected (see "lsusb" where the scanner is connected), then there could be issues depending on the computer hardware and firmware. In this case see https://bugzilla.opensuse.org/show_bug.cgi?id=856794 in particular see https://bugzilla.opensuse.org/show_bug.cgi?id=856794#c24 that reads (excerpt): ----------------------------------------------------------------- My machine has 4 USB ports, two labeled with the "super speed" USB logo (a.k.a. USB 3) and two labeled with the normal USB logo (a.k.a. USB 2) but for all 4 ports xhci is used and it fails on all 4 ports. ----------------------------------------------------------------- and see https://bugzilla.opensuse.org/show_bug.cgi?id=856794#c40 that reads (excerpt): ----------------------------------------------------------------- It depends on the computer hardware where "hardware" includes the computer's firmware (BIOS or UEFI). There are computers where USB3 always "just works". There are computers where USB3 fails under certain conditions. Perhaps there are computers where USB3 always fails. ----------------------------------------------------------------- When your scanner is not connected at a USB port where the kernel module xhci_hcd is used as kernel driver (e.g. when your scanner is connected at a USB port where the kernel module uhci_hcd or ehci_hcd is used as kernel driver), then have a look at "Trouble-Shooting (Debugging)" in https://en.opensuse.org/SDB:Configuring_Scanners For example to get USB debugging information you could use comands (as root) like ----------------------------------------------------------------- export SANE_DEBUG_SANEI_USB=128 scanimage -L unset SANE_DEBUG_SANEI_USB ----------------------------------------------------------------- -- You are receiving this mail because: You are on the CC list for the bug.