Yes, there's something wrong with the USB driver. I'm looking into it but if someone can spot the problem please let me know.

https://github.com/sirnewton01/rpi-9front/tree/master/bcm

It doesn't seem to be be present with the older single core pis. The problem presents itself as a HID message indicating extra key presses that get sent to kbdfs. It seems that the packet gets corrupted somehow.

Thanks,
Chris

> On Jan 15, 2017, at 7:38 PM, kokamoto@hera.eonet.ne.jp wrote:
> 
> The mouse input also freezes some time.
> When I playes with games/mahjonng, it occures.
> It may be recovered when I wait some time, and tries it onece again.
> Probabley usb driver has something problem?
> 
> Kenji
> 
>> Thanks for trying it out. I'm not sure about the Japanese keyboard, but that key input chattering problem is the one I'm currently hunting.
>> 
>> If anyone can spot the flaw in the usbdwc.c, trap.c or clock.c it would be a great help. Meanwhile, I'll keep looking at it myself, if slowly.
>> 
>> Chris
>> 
>> On Jan 15, 2017, at 7:01 PM, kokamoto@hera.eonet.ne.jp wrote:
>> 
>>>> I'm still working out some USB kinks. Have you had any keyboard problems? Did you compile/run with 9front
>>> 
>>> Thank you verry much, Chris.
>>> 
>>> Yes, I'm using the 9pif2 kernel for terminal (now using it)
>>> with root from tcp. I'm glad to see 4 cores here!
>>> 
>>> Yes, I have a problem to use Japanese USB keyboard.
>>> I can use it for typing '_' '|' by patching by myself
>>> (it may not be needed for another country).
>>> 
>>> I have one problem to use it, that is seeing chattering of keyinput,
>>> such that
>>> secstore: WHC
>>> where I did not type anything before that prompt.
>>> 
>>> Kenji
>>> 
>