On Mon, Jan 02, 2017 at 11:35:55AM +0200, Karmo Rosental wrote: > Hello, > > After switching to a newer laptop my USB MIDI keyboard didn't work > anymore. Other USB devices that I have (memory stick and mouse) work > well. > > 2 out of 3 USB ports couldn't keep keyboard turned on (keyboard turns > on for a second and then turns off). Only one USB port was able to > keep keyboard powered correctly. When playing half of the midi events > were not recorded due to some kind of lag. For example "note on" > skipped and nothing was played or "note off" skipped and note keeped > playing after releasing the key. > > I found out that when I disable USB 3.0 controller in BIOS then my > MIDI USB keyboard works perfectly in any of the USB port that my Dell > Latitude E7440 has. > > System log when connected to USB port that can't turn keyboard on: > > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 40.375963] usb 2-2: new > full-speed USB device number 3 using xhci_hcd > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 40.531185] usb 2-2: > Device not responding to setup address. > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 40.738066] usb 2-2: > Device not responding to setup address. > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 40.945350] usb 2-2: > device not accepting address 3, error -71 > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 41.100182] usb 2-2: new > full-speed USB device number 4 using xhci_hcd > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 41.255220] usb 2-2: > device descriptor read/64, error -71 > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 41.513405] usb 2-2: > device descriptor read/64, error -71 > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 41.774971] usb 2-2: new > full-speed USB device number 5 using xhci_hcd > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 41.775242] usb 2-2: > Device not responding to setup address. > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 41.977570] usb 2-2: > Device not responding to setup address. > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 42.184720] usb 2-2: > device not accepting address 5, error -71 > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 42.339716] usb 2-2: new > full-speed USB device number 6 using xhci_hcd > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 42.351882] usb 2-2: > device descriptor read/8, error -71 > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 42.467194] usb 2-2: > device descriptor read/8, error -71 > 02.01.17 0:41 karmo-Latitude-E7440 kernel [ 42.574581] usb > usb2-port2: unable to enumerate USB device > > System log when connected to only USB port that can turn keyboard on > but skips half of the events: > > 02.01.17 0:44 karmo-Latitude-E7440 kernel [ 225.570976] usb 2-1: new > full-speed USB device number 8 using xhci_hcd > 02.01.17 0:44 karmo-Latitude-E7440 kernel [ 225.740251] usb 2-1: New > USB device found, idVendor=1235, idProduct=001b > 02.01.17 0:44 karmo-Latitude-E7440 kernel [ 225.740253] usb 2-1: New > USB device strings: Mfr=1, Product=2, SerialNumber=0 > 02.01.17 0:44 karmo-Latitude-E7440 kernel [ 225.740254] usb 2-1: > Product: Impulse > 02.01.17 0:44 karmo-Latitude-E7440 kernel [ 225.740739] usb 2-1: > can't set config #1, error -71 > 02.01.17 0:44 karmo-Latitude-E7440 mtp-probe checking bus 2, device 8: > "/sys/devices/pci0000:00/0000:00:14.0/usb2/2-1" > 02.01.17 0:44 karmo-Latitude-E7440 mtp-probe bus: 2, device: 8 was not > an MTP device What kernel version is this? And are you sure you have the latest BIOS update for your Dell? There seems to have been some fixes in this area recently. thanks, greg k-h -- 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
