On Fri, 4 Mar 2016, Devon Ash wrote: > I'm unable to use 8 of the 10 USB devices I have on a motherboard. Two > USB 3.0 ports work, and all of the devices, if plugged into a hub, can > be recognized and used if plugged through those 2 ports. However, the > other ports are completely unresponsive. If they are completely unresponsive, why do you get the -110 errors? I would expect you wouldn't get anything at all. > Thoughts/Ideas? The broken drivers are ehci-pci. xhci-hcd works on the > usb 3.0 ports, but for 2 other usb 3.0 ports it does not work. > > The machine is being netbooted and running kernel 3.19-49-lowlatency > (i've tried with generic as well). This same identical setup running > off of a hard disk boot does not have this problem for any USB ports. > Im lead to believe there may be a bug in the ehci-pci driver while > using netboot. What type of motherboard or system is this? Can you try using a more up-to-date kernel, such as 4.4? Failing that, can you at least provide a usbmon trace showing what happens when you plug a device into one of the bad ports? And also a dmesg log with USB debugging enabled? 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
