On Sun, May 02, 2010 at 08:15:51AM -0700, Chris Rankin wrote: > Hi, > > I've just added a PCIe USB 3.0 card to my PC, because I can :-). I think it's this one: > > http://www.neoseeker.com/news/13066-gigabyte-releases-pci-e-usb-3-0-expansion-cards-/ Awesome, thanks for letting me know! ... > And then there's the dmesg log: > > xhci_hcd 0000:08:00.0: PCI INT A -> GSI 18 (level, low) -> IRQ 18 > xhci_hcd 0000:08:00.0: setting latency timer to 64 > xhci_hcd 0000:08:00.0: xHCI Host Controller > xhci_hcd 0000:08:00.0: new USB bus registered, assigned bus number 1 > xhci_hcd 0000:08:00.0: irq 18, io mem 0xfb9fe000 > usb usb1: config 1 interface 0 altsetting 0 endpoint 0x81 has no SuperSpeed companion descriptor > xHCI xhci_add_endpoint called for root hub > xHCI xhci_check_bandwidth called for root hub > > That line about "0x81 has no SuperSpeed companion descriptor" looks worrying. That line is probably complaining about the root hub descriptors, which don't look like a normal USB 3.0 hub's descriptors. It's not something to worry about though. You might also see some messages about WARN short transfer or babble; ignore those too. They were warnings about broken prototypes early in the development process, but they're not a concern now. > Finally, here's the output of /proc/bus/usb/devices: > T: Bus=01 Lev=00 Prnt=00 Port=00 Cnt=00 Dev#= 1 Spd=?? MxCh= 4 That line about speed doesn't indicate a problem with the hardware, just with the output code. We need to fix that. > B: Alloc= 0/900 us ( 0%), #Int= 0, #Iso= 0 > D: Ver= 3.00 Cls=09(hub ) Sub=00 Prot=03 MxPS= 9 #Cfgs= 1 > P: Vendor=1d6b ProdID=0003 Rev= 2.06 > S: Manufacturer=Linux 2.6.33.3 xhci_hcd > S: Product=xHCI Host Controller > S: SerialNumber=0000:08:00.0 > C:* #Ifs= 1 Cfg#= 1 Atr=e0 MxPwr= 0mA > I:* If#= 0 Alt= 0 #EPs= 1 Cls=09(hub ) Sub=00 Prot=00 Driver=hub > E: Ad=81(I) Atr=03(Int.) MxPS= 4 Ivl=12ms > > I hope some of this information is useful. I don't own any USB3 devices yet, but this card has successfully connected to a USB2 flash card reader. Sweet! All devices (except for webcams and speakers) should work under 2.6.33. Let me know if they don't. :) 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
