Re: [LAU] /dev/rtc permissions on Debian

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To: rosea.grammostola <rosea.grammostola@...>, James Stone <jamesmstone@...>
Cc: <linux-audio-user@...>
Date: Sunday, January 8, 2012 - 6:50 pm

On Sun, 08 Jan 2012 19:14:39 +0100, rosea.grammostola wrote

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

>

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 /

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

or set them in /etc/sysctl.conf

HTH Ralf Mattes

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Messages in current thread:
[LAU] /dev/rtc permissions on Debian, rosea.grammostola, (Sat Jan 7, 11:17 pm)
Re: [LAU] /dev/rtc permissions on Debian, James Stone, (Sat Jan 7, 11:41 pm)
Re: [LAU] /dev/rtc permissions on Debian, rosea.grammostola, (Sun Jan 8, 6:14 pm)
Re: [LAU] /dev/rtc permissions on Debian, R. Mattes, (Sun Jan 8, 6:50 pm)
Re: [LAU] /dev/rtc permissions on Debian, rosea.grammostola, (Fri Mar 9, 11:19 am)
Re: [LAU] /dev/rtc permissions on Debian, Jeremy Jongepier, (Fri Mar 9, 4:40 pm)
Re: [LAU] /dev/rtc permissions on Debian, rosea.grammostola, (Sat Mar 10, 1:28 pm)
Re: [LAU] /dev/rtc permissions on Debian, Jeremy Jongepier, (Sat Mar 10, 8:07 pm)
Re: [LAU] /dev/rtc permissions on Debian, Jeremy Jongepier, (Tue Jan 10, 8:54 am)
Re: [LAU] /dev/rtc permissions on Debian, rosea.grammostola, (Sun Jan 8, 7:09 pm)
Re: [LAU] /dev/rtc permissions on Debian, rosea.grammostola, (Sun Jan 8, 7:11 pm)
Re: [LAU] /dev/rtc permissions on Debian, James Stone, (Mon Jan 9, 8:37 pm)
Re: [LAU] /dev/rtc permissions on Debian, rosea.grammostola, (Mon Jan 9, 9:30 pm)
Re: [LAU] /dev/rtc permissions on Debian, Robert Jonsson, (Mon Jan 9, 10:45 pm)
Re: [LAU] /dev/rtc permissions on Debian, Christopher Cherrett, (Tue Jan 10, 12:03 am)
Re: [LAU] /dev/rtc permissions on Debian, Jeremy Jongepier, (Mon Jan 9, 9:10 pm)