On Wed, 12 Sep 2012, Michal Nowak wrote: > From https://bugzilla.kernel.org/show_bug.cgi?id=47421: > > I have problems with Samsung SCX-3205 scanner on Toshiba Satellite L855. > When is scanner connected to the notebook (via USB) I can see it via > `scanimage -L` on first attempt but on any other attempt I can't see it > any more, unless I turn the scanner off and on. > > Currently using 3.5.3-1.fc17.x86_64 kernel (but it also happens with > 3.6.0-0.rc4.git2.1.fc18). The latest working kernel is 2.6.39-1.fc16 on > that hardware (2.6.40 which was in fact 3.0, I guess, does not work). > > That scanner with identical OS - Fedora 17 - worked well on Lenovo T510 > (Sandy Bridge -- USB 2.0 only), the new Toshiba L855 (Ivy Bridge with > USB 3.0 -- xHCI) fails here. > > I somehow think it's related to the xhci driver, hence Cc-ing Sarah. Is > there a way how to disable xhci driver in favor of ehci (xhci and ehci > are both compiled-in), so I can try with ehci? I can't help with the xHCI problem, but here's how you can disable the xhci-hcd driver: echo 0000:00:14.0 >/sys/bus/pci/drivers/xhci_hcd/unbind 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
