I have tried kernels 4.8.0 and 4.9.0 from Ubuntu repositories. Probably I don't have latest BIOS. BR, Karmo 2017-01-02 15:20 GMT+02:00 Greg KH <greg@xxxxxxxxx>: > 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
