Hi. I'm trying to configure pulseaudio in Ubuntu 9.10, such that it runs as a system instance with realtime priority, upon boot. I've encountered something strange. After running... <div style="margin-left: 40px; font-family: courier new,monospace;"> chmod a+s /usr/bin/pulseaudio </div> ...I would expect invoking pulseaudio would do so with root-level permissions. And yet, here's what I get when I try that: <div style="margin-left: 40px;">id@kos-mos:~ $ pulseaudio -v ( 0.000| 0.000) I: main.c: We're in the group 'pulse-rt', allowing high-priority scheduling. ( 0.000| 0.000) I: main.c: We're in the group 'pulse-rt', allowing real-time scheduling. ( 0.000| 0.000) I: main.c: RLIMIT_RTPRIO is set to 99, allowing real-time scheduling. ( 0.000| 0.000) I: main.c: RLIMIT_NICE is set to 40, allowing high-priority scheduling. ( 0.000| 0.000) I: core-util.c: Successfully gained nice level -11. ( 0.000| 0.000) I: main.c: Giving up CAP_NICE ( 0.000| 0.000) E: main.c: Root privileges required. </div> ...Am I misunderstanding what the SUID bit does, or is pulseaudio incorrectly reporting that it doesn't have root privleges? Running the above pulseaudio command preceded by a "sudo" starts the daemon as expected. Please let me know if there's any further information I can give to help you diagnose this. -Chris PS. Here's my /etc/pulse/daemon.conf: <div style="margin-left: 40px;"># This file is part of PulseAudio. # # PulseAudio is free software; you can redistribute it and/or modify # it under the terms of the GNU Lesser General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # PulseAudio is distributed in the hope that it will be useful, but # WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU # General Public License for more details. # # You should have received a copy of the GNU Lesser General Public License # along with PulseAudio; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 # USA. ## Configuration file for the PulseAudio daemon. See pulse-daemon.conf(5) for ## more information. Default values a commented out. Use either ; or # for ## commenting. daemonize = yes ; fail = yes ; disallow-module-loading = no ; disallow-exit = no ; use-pid-file = yes system-instance = yes ; disable-shm = no ; shm-size-bytes = 0 # setting this 0 will use the system-default, usually 64 MiB high-priority = yes nice-level = -11 realtime-scheduling = yes realtime-priority = 99 ; exit-idle-time = 20 ; module-idle-time = 20 ; scache-idle-time = 20 ; dl-search-path = (depends on architecture) ; load-default-script-file = yes ; default-script-file = log-target = auto log-level = notice log-meta = no log-time = yes log-backtrace = 0 resample-method = src-linear ; disable-remixing = no ; disable-lfe-remixing = yes ; flat-volumes = yes no-cpu-limit = yes ; rlimit-fsize = -1 ; rlimit-data = -1 ; rlimit-stack = -1 ; rlimit-core = -1 ; rlimit-as = -1 ; rlimit-rss = -1 ; rlimit-nproc = -1 ; rlimit-nofile = 256 rlimit-memlock = -1 ; rlimit-locks = -1 ; rlimit-sigpending = -1 ; rlimit-msgqueue = -1 rlimit-nice = 31 rlimit-rtprio = 99 ; rlimit-rtttime = 1000000 ; default-sample-format = s16le ; default-sample-rate = 44100 default-sample-channels = 2 ; default-channel-map = front-left,front-right default-fragments = 8 default-fragment-size-msec = 10 </div> //