Re: PROBLEM: Mouse connected to USB-3 stopped working 2.6.38->39 regression

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On 04/09/2016 08:00 AM, Alan Stern wrote:
> On Sat, 9 Apr 2016, Sam Sany wrote:
>> I have yet to try the 4.5 kernel.  I prefer to use a low-latency kernel, bc 
>> the primary purpose of this machine is recording music.  So I have been 
>> downloading the newest source code available in the Ubuntu Studio 
>> repositories, configuring with the xhci drivers modulized (by default Ubuntu 
>> makes them builtin), and compiling from that.  If I download the source for 
>> 4.5, is there somewhere I can find a .config file that would allow for low-
>> latency performance?
> 
> What do you mean by low-latency kernel?  I'm not aware of any 
> low-latency patches.
> 
> There is the RT series, of course.  But it's for bounded latency, not 
> low latency.  And as far as I know, it's not available for 4.5.

low-latency kernel is a packaged Ubuntu alternate kernel configured as
CONFIG_PREEMPT=y + CONFIG_HZ=1000.

The stock Ubuntu kernel is CONFIG_PREEMPT_VOLUNTARY=y + CONFIG_HZ=250.

Regards,
Peter Hurley
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