On Mon, 15 Oct 2012, Holger Freyther wrote: > Hi, > > I have some severe issues with USB on a new system. This is > an Acer Aspire S5 (i7, Ivybridge) and the scanner can be mostly > classified as non working. > > Symptoms: > 1.) Start a scan application (e.g. simple-scan) > 2.) Scan a page > 3.) Exit the app > 4.) Start a scan application (e.g. simple-scan) > 5.) Scan a page.. > > In step five the scanning will not start. There is no kernel > output. I have tried putting a USB 2.0 hub between the physical > port and the scanner but the symptoms remain the same. The issue > occurs on 3.2, 3.5 and 3.6.x. I initially created a bug report on > the kernel bugzilla and will link to the uploads I made there. What is the bugzilla report number? > lsusb without the scanner attached [1] > lsusb with the scanner attached[2] > pcap file of usbmon when it does not work[3] It's notable that the pcap file does not show any data being sent from the scanner to the computer, only from the computer to the scanner. > I am using Debian unstable and by default sane-backends is built > with libusb-0.1 support, I rebuilt it to use libusb-1.0.0. I have The necessary support isn't present in libusb-1.0.0. I don't remember in which version it was added, but you should try running the lastest version. (In fact, maybe the support wasn't added to libusb at all, but only to libusbx.) > seen an old mail from Sarah about xhci/libusb and I added the > following to my cmdline (usbcore.usbfs_memory_mb=1000) but it didn't > change anything. I am using 3.6.2 right now and have enabled the > xhcd debug option and can provide more output. What makes you think this is related to xhci-hcd in any way? Maybe the scanner just isn't working -- you said so yourself in the first sentence. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
