On 11 Nov 2009, George Spelvin wrote: > > Your log extract strongly suggests it is a hardware problem. Either > > the NEC EHCI controller isn't working or else the thumb drive doesn't > > work at high speed. Or else the two devices are somehow mutually > > incompatible. > > Because other devices plugged into the NEC controller (e.g. the keyboard) > also disappear when this happens, I am suspicious of the controller, > but following the code is difficult. The clearest error message comes > out of the OHCI code; what do you see in there that implicates the > EHCI code path? Messages like these: [ 4.960010] usb 3-1: new high speed USB device using ehci_hcd and address 2 [ 9.970450] usb 3-1: khubd timed out on ep0in len=0/64 [ 14.961743] usb 3-1: khubd timed out on ep0in len=0/64 [ 20.100146] usb 3-1: khubd timed out on ep0in len=0/64 [ 20.160172] ehci_hcd 0000:05:00.2: port 1 high speed [ 20.160175] ehci_hcd 0000:05:00.2: GetStatus port 1 status 001005 POWER sig=se0 PE CONNECT [ 20.220010] usb 3-1: device descriptor read/64, error -110 In fact, none of the errors messages (and only two of the debug messages) in your posting were related to OHCI. > > You can't fix hardware problems in software. Try using a different USB > > storage device or a different PCIe USB card. > > A different unit of the same make and model? Already done; the problem > is repeatable in a second machine built from the same parts list. What about something other than a Mac Pro? > Or do you mean a different model? I'm working on that now, but the > problem is that the computer is a Mac Pro, which has only PCIe slots, > and every PCIe-to-USB card I can find is built with the same NEC USB > controller chip (and a PCIe bridge chip). So I'm not quite certain > what to go shopping for. > > On the USB side, I went with SanDisk because I found that other > manufactureres had quite creative interpretations of the USB standard. > Like having a non-null USB serial number that was identical on every > device. Does the thumb drive work in other computers? When it works in the motherboard ports on the Mac Pro, is it running at high speed? Alan Stern -- 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
