On 09/12/2012 10:51 PM, Alan Stern wrote: > 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 > Thanks but it did not help with 3.5.3. It turned all my USB peripheries off and did not notice the Samsung scanner (just an integrated camera which works anyway). After I bound it again I saw the scanner for a moment but then it went "offline" again. I'll try what Sarah suggested and get back to you. -- 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
