[linux-audio-user] can't start jackd from normal user

Eric Dantan Rzewnicki rzewnickie at rfa.org
Fri Sep 30 07:47:08 EDT 2005

On Thu, Sep 29, 2005 at 01:37:26PM +0200, Antonio wrote:
> On Thu, 2005-09-29 at 12:58 +0200, Peder Hedlund wrote:
> [cut]
> >  In Mandrake /dev/shm is mounted by /etc/rc.sysinit :
> >    mount -n -t tmpfs  none /dev/shm
> >  after it has mounted devpts.
> >  I guess you could have it mounted either way (but not both).
> >  Do you have a fstab entry and if so, what does it look like?
> I had no fstab entry for shm in my debian etch (testing) system.
> So /dev/shm had wrong permission. I don't now if this is a bug in the
> jackd pachage. However, if I do one of these three things I get the
> right permission so jack can start from normal user:
> 1) Add to fstab:
> shm  /dev/shm  tmpfs  nodev,nosuid,noexec  0 0
> 2) manually mont shm with:
> # mount -t tmpfs shm /dev/shm
> 3) change the permissions:
> # chomd a+rwx /dev/shm
> So use 1) for now (as suggested by Mark previously). Is this the best
> solution on debian? (Not that I don't trust Mark, but only to ask if
> debian has a specific behaviour here).

On debian sarge /dev/shm is mounted by /etc/init.d/mountvirtfs

ls -la /etc/rcS.d/S02mountvirtfs 
lrwxr-xr-x  1 root root 21 Jun 19  2004 /etc/rcS.d/S02mountvirtfs -> ../init.d/mountvirtfs

I have no /dev/shm entry in /etc/fstab and /dev/shm looks like this:

eric at audiobox:~$ ls -la /dev/shm/        
total 24
drwxrwxrwt   4 root root    80 Aug 28 17:56 .
drwxr-xr-x  14 root root 24576 Aug 28 17:52 ..
drwx------   3 eric eric    60 Aug 28 17:56 jack-1000
drwxr-xr-x   2 root root    60 Aug 28 17:50 network

I don't have an etch system handy to check, but would expect it to be
the same there.

Eric Dantan Rzewnicki  |  Systems Administrator
Technical Operations Division  |  Radio Free Asia
2025 M Street, NW  |  Washington, DC 20036  |  202-530-4900
This e-mail message is intended only for the use of the addressee and
may contain information that is privileged and confidential. Any 
unauthorized dissemination, distribution, or copying is strictly 
prohibited. If you receive this transmission in error, please contact
network at rfa.org.

More information about the Linux-audio-user mailing list