[LAU] RTC/HPET timer permissions

[Robert Jonsson]

Hi,

2012/11/26 Clemens Ladisch <clemens at ladisch.de>:
> Jeremy Jongepier wrote:
>> On 11/25/2012 01:23 PM, Clemens Ladisch wrote:
>>> Using the RTC or HPET devices directly is necessary only if
>>> the kernel does not use them for timers.  Nowadays, kernels do, and
>>> applications use the proper timer APIs.
>>
>> What are those timer API's?
>
> POSIX timers, interval timers, nanosleep(), usleep(), poll() timeout.
>
>>> You'd need this only if you're using some audio application that hasn't
>>> been updated for many years.
>>
>> So this section has become deprecated?
>> http://wiki.linuxmusicians.com/doku.php?id=system_configuration#hardware_timers
>
> Only if all applications actually have been updated.
> Wasn't there some sequencer (Rosegarden? Muse?) that still uses RTC?

MusE first tries RTC, if that doesn't work it will try Alsa and be
happy with that if the aquired frequency is high enough.

Regards,
Robert