[LAU] jack2, -c hpet ?

Robin Gareus robin at gareus.org
Sat Sep 11 19:51:24 UTC 2010

On 09/11/2010 07:15 PM, Paul Davis wrote:
> On Sat, Sep 11, 2010 at 12:18 AM, Jonathan E. Brickman
> <jeb at ponderworthy.com> wrote:
>>  I have stabilized and accelerated things a lot with clocksource=hpet on
>> the kernel line; but I am wondering if I could get rid of my very very
>> few remaining xruns with "-c hpet" in the jackd command line.  Only
>> thing is, jackd is reporting hpet as unsupported / not implemented.
>> Thoughts, anyone?
> HPET has as about as close to zero effect on xruns as is possible.

More info on this can be found in a thread on LAD about a year ago:

> To use it your kernel and hardware must support the HPET timer. If one
> or both of them do not you will see that message.

Just for completeness: the message ("This system has no accessible HPET
device (Device or resource busy") also shows if the user has no
permission to access /dev/hpet


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