Re: /dev/rtc permissions on Debian

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On 01/08/2012 07:50 PM, R. Mattes wrote:
On Sun, 08 Jan 2012 19:14:39 +0100, rosea.grammostola wrote
On 01/08/2012 12:40 AM, James Stone wrote:
On 1/7/12, rosea.grammostola<rosea.grammostola@xxxxxxxxx>   wrote:
Hi,

cannot set tick on /dev/rtc permission denied

What a unhelpful error message! can't they at least include information
on the value that was supposed to be used?


same here, but the audio group has also the rights for /dev/rtc

We need the permissions of the actual device file (/dev/rtc0) , _not_
the link since the link permission only describes who is allowed to
follow the link.

But still I get the message when launching Oostudio (openoctave /
oom).

You might have your settings for the maximum value set too low. What does
the following show:

  $ cat /sys/class/rtc/rtc0/max_user_freq

On older kernels that should be:

  $ cat /proc/sys/dev/rtc/max-user-freq

Also relevant:

  $ cat /proc/sys/dev/hpet/max-user-freq

You can set these values like this:

  $ sudo echo 2048>  /sys/class/rtc/rtc0/max_user_freq
  $ sudo echo 2048>  /proc/sys/dev/hpet/max-user-freq

This seems to be gone after reboot

or set them in /etc/sysctl.conf

is this permanent? How do I do that exactly?

\r

HTH Ralf Mattes



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