Hi, Felipe Ferreri Tonello <eu@xxxxxxxxxxxxxxxxx> writes: >>> I have tried kernels 4.8.0 and 4.9.0 from Ubuntu repositories. >>> Probably I don't have latest BIOS. >> >> Try updating it and see if that resolves this issue. >> > > It is very unlikely to be Linux since there was no changes in the USB > host driver for MIDI neither ALSA recently. > > Looks like a BIOS issue. I'm not so sure... From what I understood, the log entitled "System log when connected to only USB port that can turn keyboard on but skips half of the events" means that keyboard is powered on, but still doesn't work properly. Karmo, can you get a log from the case where keyboard works with USB3 disabled in BIOS? I'm assuming port will be handled by EHCI instead, just wanna confirm. If that's the case, then a usbmon trace of failing case might help quite a bit. See Documentation/usb/usbmon.txt for details. -- balbi
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