[pulseaudio-discuss] pulseaudio on maemo/n800

Kwan Hong Lee kwan at media.mit.edu
Tue Apr 29 12:12:07 PDT 2008

The files /var/run/pulse nor /tmp/pulse-user are not created at all.  I
manually create them, but that does not help either.

Maybe it's because it's tmpfs.  Is there any way to change this?

Thank you!


On Tue, Apr 29, 2008 at 2:59 PM, Jim Carter <jimc at math.ucla.edu> wrote:

> On Tue, 29 Apr 2008, Colin Guthrie wrote:
> > Kwan Hong Lee wrote:
> > > I have been able to build pulseaudio on maemo 4.0 by getting the lates
> > > libltdl.
> > >
> > > I have added the pulse user, pulse group, pulse-access group and and
> > > added pulse to the audio group.  I added normal user to pulse-access.
> >
> > I'm not really sure how this applies in the context of a Maemo, but
> > certainly on desktop targets it's generally not advised any more to run
> > a single pulseaudio daemon, but rather run one pa daemon per user
> > accessing sound.
> Maemo normally uses a system-wide instance of ESD running as root.
> Maemo is intended for a PDA-like context where the person in physical
> possession is the authorized console user, and they tend to commingle
> system-level and userspace functions.  It's a very different world from
> the
> usual desktop or server system, and IMHO there are advantages to the
> desktop way of doing things.
> One of the Nokia developers is working on getting PA and Bluez (A2DP)
> working, though I don't think he has officially stated for which OS he's
> doing this project.  Apparently the differences between the ARM and Intel
> instruction sets make it hard to meet the desired CPU load goals due to
> optimization issues.  Maybe he'll have comments.
> > > user$ pulseaudio
> > > W: core-util.c: setpriority(): Permission denied
> > > E: main.c: Failed to create '/tmp/pulse-user': Permission denied
> >
> > Can you create the folder /tmp/pulse-user yourself? Can you chown and
> > chmod OK on the filesystem? Perhaps it is a FAT filesystem and pulse is
> > failing because the chown/chmod is not working? (not looked at the code
> > for a while so not 100% sure on that one).
> The filesystem for /tmp is tmpfs, and for the main flash disc is jffs2.
> But the expansion flash "discs" are typically vfat, hiss, boo.
> If /tmp/pulse-user had already been created as root, probably mode 700,
> that would explain the second "permission denied".  Pick one style, remove
> the directory, and likely everything will be fine.
> > > If I run as root
> > >
> > >  pulseaudio --system
> > > W: core-util.c: setpriority(): Permission denied
> > > E: main.c: Failed to create '/var/run/pulse': Permission denied
> /var/run is a symlink to /tmp/.run, root:root 755.  If PA is configured to
> drop privileges, i.e. change to user "pulse", and this happens before the
> PID file is created, that would explain this error.  Then again, it could
> also be a pre-existing PID file created as root.
> Have you added "user" to group pulse-rt in /etc/group?  Although modern PA
> goes through PolicyKit to get realtime priority, I imagine it can fall
> back
> to the group method when PolicyKit is not available, as in Maemo-4.0.
> James F. Carter          Voice 310 825 2897    FAX 310 206 6673
> UCLA-Mathnet;  6115 MSA; 405 Hilgard Ave.; Los Angeles, CA, USA 90095-1555
> Email: jimc at math.ucla.edu  http://www.math.ucla.edu/~jimc<http://www.math.ucla.edu/%7Ejimc>(q.v. for PGP key)
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