Hi,
I had no problem with a USB 3.0 port in my Asus N43SN since I bought a laptop (~2 years). Recently I replaced a motherboard to the new one (N43SL.413 looked the same as the first one) due to a problem with a graphical chipset and after that a USB3 controller stopped to be even detected.
$ lspci | grep -i USB 00:1a.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #2 (rev 05) 00:1d.0 USB controller: Intel Corporation 6 Series/C200 Series Chipset Family USB Enhanced Host Controller #1 (rev 05)
(in the past there was also an additional USB3 controller - AFAIR Fresco Logic FL1000G USB 3.0).
I though it was a problem with a motherboard, but after boot with different kernel the controller showed up. I started to suspect a bug in kernel, but after two days (I use it only from time to time with my USB3 hard drive) I noticed that USB3 port/controller is not visible anymore with any kernel. I don't know if this behavior is normal for a hardware malfunction.
In /var/log/messages there is no info about the USB3 controller (see log below). I tried pci=nomsi in Grub, but with no effect. I could try to replace the mother board to the new one once again (I don't have the old one), but it could be hard to convince service that this is a problem with hardware (the port in the new motherboard worked fine twice). I don't any other OS to test it on it.
Tested with kernels: kernel-3.10.4-100.fc18.x86_64 kernel-3.9.11-200.fc18.x86_64 kernel-3.9.9-201.fc18.x86_64 and in addition with System Rescue CD.
What could be a reason? Can I force kernel to "see it" (there is no module xhci_hcd - it is built into kernel)?
Marcin
[ 1.424160] ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver [ 1.424162] ehci-pci: EHCI PCI platform driver [ 1.424249] ehci-pci 0000:00:1a.0: EHCI Host Controller [ 1.424310] ehci-pci 0000:00:1a.0: new USB bus registered, assigned bus number 1 [ 1.424327] ehci-pci 0000:00:1a.0: debug port 2 [ 1.428259] ehci-pci 0000:00:1a.0: irq 16, io mem 0xdf008000 [ 1.433314] ehci-pci 0000:00:1a.0: USB 2.0 started, EHCI 1.00 [ 1.433333] usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 [ 1.433335] usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.433337] usb usb1: Product: EHCI Host Controller [ 1.433339] usb usb1: Manufacturer: Linux 3.9.9-201.fc18.x86_64 ehci_hcd [ 1.433341] usb usb1: SerialNumber: 0000:00:1a.0 [ 1.433438] hub 1-0:1.0: USB hub found [ 1.433442] hub 1-0:1.0: 2 ports detected [ 1.433581] ehci-pci 0000:00:1d.0: EHCI Host Controller [ 1.433621] ehci-pci 0000:00:1d.0: new USB bus registered, assigned bus number 2 [ 1.433638] ehci-pci 0000:00:1d.0: debug port 2 [ 1.437561] ehci-pci 0000:00:1d.0: irq 23, io mem 0xdf007000 [ 1.443310] ehci-pci 0000:00:1d.0: USB 2.0 started, EHCI 1.00 [ 1.443323] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002 [ 1.443325] usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.443327] usb usb2: Product: EHCI Host Controller [ 1.443329] usb usb2: Manufacturer: Linux 3.9.9-201.fc18.x86_64 ehci_hcd [ 1.443331] usb usb2: SerialNumber: 0000:00:1d.0 [ 1.443414] hub 2-0:1.0: USB hub found [ 1.443418] hub 2-0:1.0: 2 ports detected [ 1.443485] ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver [ 1.443495] uhci_hcd: USB Universal Host Controller Interface driver
=== this part is currently missing - START ===
[ 1.443569] xhci_hcd 0000:04:00.0: xHCI Host Controller [ 1.443608] xhci_hcd 0000:04:00.0: new USB bus registered, assigned bus number 3 [ 1.572613] usb usb3: New USB device found, idVendor=1d6b, idProduct=0002 [ 1.572616] usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.572617] usb usb3: Product: xHCI Host Controller [ 1.572620] usb usb3: Manufacturer: Linux 3.9.9-201.fc18.x86_64 xhci_hcd [ 1.572621] usb usb3: SerialNumber: 0000:04:00.0 [ 1.572706] hub 3-0:1.0: USB hub found [ 1.572712] hub 3-0:1.0: 1 port detected [ 1.572761] xhci_hcd 0000:04:00.0: xHCI Host Controller [ 1.572802] xhci_hcd 0000:04:00.0: new USB bus registered, assigned bus number 4 [ 1.572829] usb usb4: New USB device found, idVendor=1d6b, idProduct=0003 [ 1.572831] usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1 [ 1.572833] usb usb4: Product: xHCI Host Controller [ 1.572835] usb usb4: Manufacturer: Linux 3.9.9-201.fc18.x86_64 xhci_hcd [ 1.572837] usb usb4: SerialNumber: 0000:04:00.0 [ 1.572911] hub 4-0:1.0: USB hub found [ 1.572916] hub 4-0:1.0: 1 port detected
=== this part is currently missing - END ===
[ 1.580289] usbcore: registered new interface driver usbserial [ 1.580295] usbcore: registered new interface driver usbserial_generic