On Tue, Dec 17, 2013 at 11:56:25AM -0500, Alan Stern wrote: > On Tue, 17 Dec 2013, Ken Harris wrote: > > > Sebastien: > > > > Thanks for the info. I just tried Linux 3.13.0-0.rc3.git5.1.fc21.i686 > > (from Fedora rawhide) and I still get the same error messages and USB > > still doesn't work. I saw a post about Atom Z3740D (Bay Trail-T) in a > > Dell Venue 8 Pro, and his USB works OK (but seems to use the xhci_hcd > > driver : > > > Whereas my Gateway LT41P uses ehci & ohci : > > > A clue? A workaround ? > > > >> [ 61.785031] pci 0000:00:1d.0: EHCI: BIOS handoff failed (BIOS bug?) 01010001 > > Since the problem lies in the BIOS, you should check if any BIOS > updates are available. Are you enabling CONFIG_USB_XHCI_HCD in your .config? Maybe the BIOS expects your OS to switch the ports over to xHCI, but you don't have the driver compiled? If you do have CONFIG_USB_XHCI_HCD turned on for 3.13, please make sure CONFIG_USB_DEBUG is turned on as well, and send me the resulting dmesg, starting from boot. That should let me see which (if any) ports are being switched over from EHCI to xHCI. Other things to look for in your BIOS settings are things labeled "xHCI mode". It may have options like "enabled", "disabled", "Auto", or "Smart Auto". You want it to be set to either "enabled" or one of the "auto" options. Sarah Sharp -- 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
