On Wed, Dec 18, 2013 at 12:00 AM, Ken Harris <kjh@xxxxxxxxxxx> wrote: > On Tue, Dec 17, 2013 at 6:47 PM, Ken Harris <kjh@xxxxxxxxxxx> wrote: >> On Tue, Dec 17, 2013 at 5:33 PM, Ken Harris <kjh@xxxxxxxxxxx> wrote: >>> On Tue, Dec 17, 2013 at 1:03 PM, Sarah Sharp >>> <sarah.a.sharp@xxxxxxxxxxxxxxx> 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 >>> >>>> 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 >>> >>> Sarah ! >>> >>> Thanks for looking at this. >>> >>> Yes, Fedora has CONFIG_USB_XHCI_HCD=y . When you say, "switch the >>> ports over to xHCI" ... I assume your mean this patch : >>> >>> [PATCH] xhci: Add BayTrail to list of Intel switchable hosts ( >>> http://www.spinics.net/lists/linux-usb/msg86204.html ). >>> >>> I don't see CONFIG_USB_DEBUG set in Fedora, but they do distribute >>> debug kernels (eg : kernel-PAEdebug-3.11.10-301.fc20.i686 ), so >>> perhaps that includes setting CONFIG_USB_DEBUG ? My original post has >>> the output of a debug kernel : >>> http://www.spinics.net/lists/linux-usb/msg99549.html . >>> >>> If that's not good enough, I can try to compile a kernel with >>> CONFIG_USB_DEBUG, but it looks like there is no "xHCI switch" code in >>> Fedora: >>> >>> From my (noobish) reading of the Fedora source ( >>> http://mirrors.kernel.org/fedora/development/rawhide/source/SRPMS/k/kernel-3.13.0-0.rc3.git5.1.fc21.src.rpm >>> : linux-3.12 patch-3.13-rc3 patch-3.13-rc3-git5 ), I don't see any >>> reference to the switchable code (ie : 'find -type f |xargs egrep >>> "PCI_DEVICE_ID_INTEL_LYNX_POINT|intel_switchabl"' returns nothing). >>> >>> FYI, I filed a Redhat bug : https://bugzilla.redhat.com/show_bug.cgi?id=1039245 >>> >>> FYI, my BIOS doesn't have any USB options (just AHCI). >>> >>> FYI, the Dell Venue 8 Pro user (adam) is also using Fedora, but I >>> suspect that his BIOS has enabled xHCI, so he doesn't need the "xHCI >>> switchable" code. >>> >>> I haven't built a kernel in a while, but I can try to apply the patch >>> and see if that fixed the problem. >>> >>> Thanks again, >>> Ken >> >> Oops, >> >> I missed the newer "xHCI switch" patch : "Intel xhci: refactor >> EHCI/xHCI port switching" ( >> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=26b76798e0507429506b93cd49f8c4cfdab06896 >> ). That code is in Fedora 3.13-rc3-git5 source : >> > >> I tried kernel-PAEdebug-3.13.0-0.rc4.git0.1.fc21.i686 , but there is >> nothing about xhci (attached) >> >> What now? Perhaps I should try to compile with CONFIG_USB_DEBUG ? >> >> Thanks, >> Ken > > Sarah: > > I turned on "dynamic debug" and got a few more messages from ehci_hcd > , ehci-pci, ohci_hcd (see attached). > > FYI, my addition to the cmdline was : dyndbg="module xhci_hcd +p ; > module ehci_hcd +p ; module uhci_hcd +p ; module ohci_hcd +p ; module > ehci_pci +p ; module ohci_pci +p ; module pci_quirks +p" > > If there are other modules you'd like to see, let me know. > > FYI, there seems to be a bug in grub2 in Fedora (it transforms " " > into "\x20") , so I had to use gummiboot. > > Cheers, > Ken I noticed this message in dmesg : Some PCI device resources are unassigned, try booting with pci=realloc So I added "pci=realloc", but I still get : pci 0000:00:1c.0: BAR 15: can't assign mem pref (size 0x200000) pci 0000:00:1c.2: BAR 14: can't assign mem (size 0x200000) pci 0000:00:1c.2: BAR 15: can't assign mem pref (size 0x200000) pci 0000:00:1c.0: BAR 15: can't assign mem pref (size 0x400000) pci 0000:00:1c.2: BAR 14: can't assign mem (size 0x400000) pci 0000:00:1c.2: BAR 15: can't assign mem pref (size 0x400000) pci 0000:00:1c.0: BAR 15: can't assign mem pref (size 0x200000) pci 0000:00:1c.2: BAR 14: can't assign mem (size 0x200000) pci 0000:00:1c.2: BAR 15: can't assign mem pref (size 0x200000) Could this be the reason that the xHCI controller doesn't show up ? -- 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
