With the Pure Data module loaded in patchbox and launching PD with the pi sound button I get an ALSA audio in/out error “device or resource not available” Starting PD from the Application menu with a mouse works fine however. So PD in gui mode is trying to start with the alsa driver which has already been taken by JACK. Editing the script at /usr/local/pisound/scripts/common/start_puredata.sh and changing the audio driver from alsa to jack has sorted the issue. Curious to know why starting PD with the button means that PD does not show up in the task manager app.
I’m not sure about why it wouldn’t show up in task manager, but try running:
ps -ef
in a terminal - it should list all the processes, including their command lines.
Btw, what is the output of these commands:
cd /usr/local/pisound/scripts/common/
git status
I’m interested to know which branch the scripts repository is on. 
The command ps -ef shows the following info:
patch@Pisound:~ $ ps -ef
UID PID PPID C STIME TTY TIME CMD
root 1 0 1 09:07 ? 00:00:04 /sbin/init
root 2 0 0 09:07 ? 00:00:00 [kthreadd]
root 3 2 0 09:07 ? 00:00:00 [rcu_gp]
root 4 2 0 09:07 ? 00:00:00 [rcu_par_gp]
root 5 2 0 09:07 ? 00:00:01 [kworker/0:0-events]
root 6 2 0 09:07 ? 00:00:00 [kworker/0:0H-mmc_complete]
root 7 2 0 09:07 ? 00:00:00 [kworker/u8:0-events_unbound]
root 8 2 0 09:07 ? 00:00:00 [mm_percpu_wq]
root 9 2 0 09:07 ? 00:00:00 [rcu_tasks_rude_]
root 10 2 0 09:07 ? 00:00:00 [rcu_tasks_trace]
root 11 2 0 09:07 ? 00:00:00 [ksoftirqd/0]
root 12 2 0 09:07 ? 00:00:00 [rcu_sched]
root 13 2 0 09:07 ? 00:00:00 [migration/0]
root 14 2 0 09:07 ? 00:00:00 [cpuhp/0]
root 15 2 0 09:07 ? 00:00:00 [cpuhp/1]
root 16 2 0 09:07 ? 00:00:00 [migration/1]
root 17 2 0 09:07 ? 00:00:00 [ksoftirqd/1]
root 18 2 0 09:07 ? 00:00:00 [kworker/1:0-events]
root 19 2 0 09:07 ? 00:00:00 [kworker/1:0H-kblockd]
root 20 2 0 09:07 ? 00:00:00 [cpuhp/2]
root 21 2 0 09:07 ? 00:00:00 [migration/2]
root 22 2 0 09:07 ? 00:00:00 [ksoftirqd/2]
root 23 2 0 09:07 ? 00:00:00 [kworker/2:0-mm_percpu_wq]
root 24 2 0 09:07 ? 00:00:00 [kworker/2:0H-kblockd]
root 25 2 0 09:07 ? 00:00:00 [cpuhp/3]
root 26 2 0 09:07 ? 00:00:00 [migration/3]
root 27 2 0 09:07 ? 00:00:00 [ksoftirqd/3]
root 28 2 0 09:07 ? 00:00:00 [kworker/3:0-events]
root 29 2 0 09:07 ? 00:00:00 [kworker/3:0H-kblockd]
root 30 2 0 09:07 ? 00:00:00 [kdevtmpfs]
root 31 2 0 09:07 ? 00:00:00 [netns]
root 32 2 0 09:07 ? 00:00:00 [kworker/0:1-pm]
root 33 2 0 09:07 ? 00:00:00 [kworker/1:1-events]
root 34 2 0 09:07 ? 00:00:00 [kworker/2:1-events]
root 35 2 0 09:07 ? 00:00:00 [kauditd]
root 36 2 0 09:07 ? 00:00:00 [khungtaskd]
root 37 2 0 09:07 ? 00:00:00 [oom_reaper]
root 38 2 0 09:07 ? 00:00:00 [writeback]
root 39 2 0 09:07 ? 00:00:00 [kcompactd0]
root 57 2 0 09:07 ? 00:00:00 [kblockd]
root 58 2 0 09:07 ? 00:00:00 [blkcg_punt_bio]
root 59 2 0 09:07 ? 00:00:00 [watchdogd]
root 60 2 0 09:07 ? 00:00:00 [kworker/3:1-events_freezable]
root 61 2 0 09:07 ? 00:00:00 [kworker/0:1H-kblockd]
root 62 2 0 09:07 ? 00:00:00 [rpciod]
root 63 2 0 09:07 ? 00:00:00 [kworker/u9:0-hci0]
root 64 2 0 09:07 ? 00:00:00 [xprtiod]
root 65 2 0 09:07 ? 00:00:00 [kswapd0]
root 66 2 0 09:07 ? 00:00:00 [nfsiod]
root 67 2 0 09:07 ? 00:00:00 [kthrotld]
root 68 2 0 09:07 ? 00:00:00 [iscsi_eh]
root 69 2 0 09:07 ? 00:00:00 [iscsi_destroy]
root 70 2 0 09:07 ? 00:00:00 [kworker/u8:1-events_unbound]
root 72 2 0 09:07 ? 00:00:00 [DWC Notificatio]
root 73 2 0 09:07 ? 00:00:00 [uas]
root 74 2 0 09:07 ? 00:00:01 [kworker/0:2-events]
root 75 2 0 09:07 ? 00:00:00 [vchiq-slot/0]
root 76 2 0 09:07 ? 00:00:00 [vchiq-recy/0]
root 77 2 0 09:07 ? 00:00:00 [vchiq-sync/0]
root 78 2 0 09:07 ? 00:00:00 [zswap-shrink]
root 79 2 0 09:07 ? 00:00:00 [kworker/0:3-rcu_gp]
root 80 2 0 09:07 ? 00:00:00 [sdhci]
root 81 2 0 09:07 ? 00:00:00 [irq/50-mmc0]
root 82 2 0 09:07 ? 00:00:00 [kworker/3:2-mm_percpu_wq]
root 83 2 0 09:07 ? 00:00:00 [mmc_complete]
root 84 2 0 09:07 ? 00:00:00 [kworker/3:1H-kblockd]
root 85 2 0 09:07 ? 00:00:00 [kworker/2:1H-kblockd]
root 86 2 0 09:07 ? 00:00:00 [kworker/2:2H]
root 87 2 0 09:07 ? 00:00:00 [jbd2/mmcblk0p2-]
root 88 2 0 09:07 ? 00:00:00 [ext4-rsv-conver]
root 89 2 0 09:07 ? 00:00:00 [ipv6_addrconf]
root 90 2 0 09:07 ? 00:00:00 [kworker/2:2-mm_percpu_wq]
root 94 2 0 09:07 ? 00:00:00 [kworker/1:1H-kblockd]
root 106 2 0 09:07 ? 00:00:00 [kworker/1:2H]
root 107 2 0 09:07 ? 00:00:00 [kworker/3:2H-kblockd]
root 111 1 0 09:07 ? 00:00:00 /lib/systemd/systemd-journald
root 114 2 0 09:07 ? 00:00:00 [kworker/0:2H-mmc_complete]
root 148 1 0 09:07 ? 00:00:00 /lib/systemd/systemd-udevd
root 174 2 0 09:07 ? 00:00:00 [kworker/1:2-mm_percpu_wq]
root 187 2 0 09:07 ? 00:00:00 [vchiq-keep/0]
root 189 2 0 09:07 ? 00:00:00 [SMIO]
root 197 2 0 09:07 ? 00:00:00 [mmal-vchiq]
root 204 2 0 09:07 ? 00:00:00 [spi0]
root 213 2 0 09:07 ? 00:00:00 [mmal-vchiq]
root 214 2 0 09:07 ? 00:00:00 [mmal-vchiq]
root 216 2 0 09:07 ? 00:00:00 [mmal-vchiq]
root 230 2 0 09:07 ? 00:00:00 [irq/65-data_ava]
root 231 2 0 09:07 ? 00:00:00 [pisnd_workqueue]
root 252 2 0 09:07 ? 00:00:00 [cfg80211]
root 260 2 0 09:07 ? 00:00:00 [brcmf_wq/mmc1:0]
root 261 2 0 09:07 ? 00:00:00 [brcmf_wdog/mmc1]
root 262 2 0 09:07 ? 00:00:00 [kworker/1:3-events_power_effici
systemd+ 389 1 0 09:07 ? 00:00:00 /lib/systemd/systemd-timesyncd
root 424 1 0 09:07 ? 00:00:00 /usr/sbin/alsactl -E HOME=/run/a
message+ 429 1 0 09:07 ? 00:00:00 /usr/bin/dbus-daemon --system --
root 430 1 1 09:07 ? 00:00:02 /usr/bin/pisound-ctl
root 431 1 0 09:07 ? 00:00:00 /usr/sbin/cron -f
root 433 1 0 09:07 ? 00:00:00 /sbin/wpa_supplicant -u -s -O /r
root 435 1 0 09:07 ? 00:00:00 /usr/lib/udisks2/udisksd
root 439 1 0 09:07 ? 00:00:00 /usr/sbin/rsyslogd -n -iNONE
root 441 1 0 09:07 ? 00:00:00 /lib/systemd/systemd-logind
avahi 444 1 0 09:07 ? 00:00:00 avahi-daemon: running [Pisound.l
nobody 449 1 0 09:07 ? 00:00:00 /usr/sbin/thd --triggers /etc/tr
root 455 1 0 09:07 ? 00:00:00 /usr/sbin/cupsd -l
root 474 1 0 09:07 ? 00:00:00 /usr/sbin/rngd -r /dev/hwrng
avahi 486 444 0 09:07 ? 00:00:00 avahi-daemon: chroot helper
root 489 2 0 09:07 ? 00:00:00 [kworker/2:3-cgroup_destroy]
root 521 2 0 09:07 ? 00:00:00 [kworker/u8:2-events_unbound]
root 523 1 0 09:07 ? 00:00:00 /usr/sbin/cups-browsed
root 527 1 0 09:07 ? 00:00:00 /usr/bin/pisound-btn
jack 530 1 4 09:07 ? 00:00:10 /usr/bin/jackd -t 2000 -R -P 95
root 532 1 0 09:07 ? 00:00:00 /usr/bin/amidiauto
root 545 2 0 09:07 ? 00:00:00 [kworker/u8:3]
root 546 2 0 09:07 ? 00:00:00 [kworker/3:3-cgroup_destroy]
root 547 1 0 09:07 ? 00:00:00 /usr/lib/policykit-1/polkitd --n
colord 557 1 0 09:07 ? 00:00:00 /usr/lib/colord/colord
root 567 1 0 09:07 ? 00:00:00 wpa_supplicant -B -c/etc/wpa_sup
root 602 2 0 09:07 ? 00:00:00 [kworker/u9:1-hci0]
root 603 1 0 09:07 ? 00:00:00 /usr/bin/hciattach /dev/serial1
root 604 2 0 09:07 ? 00:00:00 [kworker/u9:2-hci0]
root 607 1 0 09:07 ? 00:00:00 /usr/lib/bluetooth/bluetoothd
root 608 1 0 09:07 ? 00:00:00 /usr/bin/bluealsa
root 618 2 0 09:07 ? 00:00:00 [krfcommd]
root 620 430 0 09:07 ? 00:00:00 /bin/sh /usr/bin/mec /etc/mec-bl
root 624 430 0 09:07 ? 00:00:00 osc2midi pisound-ctl 127.0.0.1 5
root 626 620 0 09:07 ? 00:00:02 mec-app /etc/mec-blokas.json
root 675 1 0 09:07 ? 00:00:00 /sbin/dhcpcd -q -w
root 680 1 0 09:07 ? 00:00:00 /usr/bin/python3 /usr/bin/toucho
root 683 1 0 09:07 ? 00:00:00 /usr/bin/vncserver-x11-serviced
root 687 1 0 09:07 ? 00:00:00 /usr/sbin/lightdm
root 690 683 5 09:07 ? 00:00:13 /usr/bin/vncserver-x11-core -ser
root 691 1 0 09:07 ? 00:00:00 /usr/sbin/sshd -D
root 693 1 0 09:07 ? 00:00:00 /usr/sbin/netatalk
root 694 693 0 09:07 ? 00:00:01 /usr/sbin/afpd -d -F /etc/netata
root 696 693 0 09:07 ? 00:00:00 /usr/sbin/cnid_metad -d -F /etc/
root 703 1 0 09:07 tty1 00:00:00 /sbin/agetty -o -p -- \u --nocle
root 704 687 16 09:07 tty7 00:00:42 /usr/lib/xorg/Xorg :0 -seat seat
root 706 1 0 09:07 ttyS0 00:00:00 /sbin/agetty -o -p -- \u --keep-
root 723 1 0 09:07 ? 00:00:01 /usr/bin/vncagent service 15
root 932 687 0 09:07 ? 00:00:00 lightdm --session-child 14 21
root 1049 691 0 09:08 ? 00:00:00 sshd: patch [priv]
patch 1053 1 0 09:08 ? 00:00:00 /lib/systemd/systemd --user
patch 1054 1053 0 09:08 ? 00:00:00 (sd-pam)
patch 1068 1049 0 09:08 ? 00:00:00 sshd: patch@pts/0
patch 1069 1068 0 09:08 pts/0 00:00:00 -bash
lp 1178 455 0 09:09 ? 00:00:00 /usr/lib/cups/notifier/dbus dbus
patch 1184 932 0 09:09 ? 00:00:00 /usr/bin/lxsession -s LXDE-pi -e
patch 1192 1053 0 09:09 ? 00:00:00 /usr/bin/dbus-daemon --session -
patch 1213 1184 0 09:09 ? 00:00:00 /usr/bin/ssh-agent x-session-man
patch 1224 1053 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfsd
patch 1229 1053 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfsd-fuse /run/us
patch 1239 1184 0 09:09 ? 00:00:00 openbox --config-file /home/patc
patch 1240 1184 0 09:09 ? 00:00:00 lxpolkit
patch 1243 1184 0 09:09 ? 00:00:01 lxpanel --profile LXDE-pi
patch 1246 1184 0 09:09 ? 00:00:01 pcmanfm --desktop --profile LXDE
patch 1247 1184 0 09:09 ? 00:00:00 xscreensaver -no-splash
patch 1256 1 0 09:09 ? 00:00:00 /usr/bin/ssh-agent -s
patch 1261 1 0 09:09 ? 00:00:00 /usr/bin/python3 /usr/share/syst
patch 1276 1053 0 09:09 ? 00:00:00 /usr/bin/pulseaudio --daemonize=
rtkit 1281 1 0 09:09 ? 00:00:00 /usr/lib/rtkit/rtkit-daemon
patch 1293 1053 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfs-udisks2-volum
patch 1299 1 0 09:09 ? 00:00:00 /usr/lib/menu-cache/menu-cached
patch 1304 1053 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfs-afc-volume-mo
patch 1309 1053 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfs-mtp-volume-mo
patch 1313 1053 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfs-gphoto2-volum
patch 1317 1053 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfs-goa-volume-mo
patch 1319 1 0 09:09 ? 00:00:00 /usr/bin/vncserverui service 19
patch 1331 1319 0 09:09 ? 00:00:00 /usr/bin/vncserverui -statusicon
patch 1334 1224 0 09:09 ? 00:00:00 /usr/lib/gvfs/gvfsd-trash --spaw
patch 1464 1243 1 09:09 ? 00:00:01 lxtask
patch 1550 1243 0 09:10 ? 00:00:00 lxterminal
patch 1564 1550 0 09:10 pts/1 00:00:00 bash
root 1628 1 0 09:10 ? 00:00:00 /bin/sh /usr/local/pisound/scrip
root 1636 1628 9 09:10 ? 00:00:07 puredata -jack -audioadddev piso
root 1639 1636 0 09:10 ? 00:00:00 sh -c TCL_LIBRARY="/usr/lib/pure
root 1640 1639 11 09:10 ? 00:00:08 wish /usr/lib/puredata/tcl//pd-g
root 1647 1636 0 09:10 ? 00:00:00 sh -c /usr/lib/puredata/bin/pd-w
root 1648 1647 0 09:10 ? 00:00:00 /usr/lib/puredata/bin/pd-watchdo
patch 1673 1564 0 09:11 pts/1 00:00:00 ps -ef
Output from git status:
patch@Pisound:/usr/local/pisound/scripts/common $ git status
On branch patchbox
Your branch is up to date with 'origin/patchbox'.
Changes not staged for commit:
(use "git add <file>..." to update what will be committed)
(use "git checkout -- <file>..." to discard changes in working directory)
modified: start_puredata.sh
no changes added to commit (use "git add" and/or "git commit -a")
Here you can see PD running.
Could you run
git diff
in the scripts folder? The branch is correct, but something was modified.
The patchbox branch of scripts doesn’t specify the audio engine to use at all, maybe you had previously modified the command line to use ALSA, then switched to Jack?
The original script version for patchbox branch is here: pisound/scripts/common/start_puredata.sh at patchbox · BlokasLabs/pisound · GitHub
Thank you Giedrius. Yes I’m reminded that I had to modify it some time ago. I was having trouble with jack and also wanted to see the GUI…perhaps I should undergo diagnosis for memory loss 
git diff below:
diff --git a/scripts/common/start_puredata.sh b/scripts/common/start_puredata.sh
index b8be476..4f9767f 100755
--- a/scripts/common/start_puredata.sh
+++ b/scripts/common/start_puredata.sh
@@ -51,7 +51,9 @@ start_puredata()
shift
log "Launching Pure Data."
- cd "$PATCH_DIR" && puredata -stderr $NO_GUI -send ";pd dsp 1" "$PATCH" $@ &
+ # to run pd in NO_GUI mode swop the 2 lines below: uncomment the line below and comment the line below that...
+ #cd "$PATCH_DIR" && puredata -stderr $NO_GUI -send ";pd dsp 1" "$PATCH" $@ &
+ cd "$PATCH_DIR" && puredata -jack -audioadddev pisound -alsamidi -channels 2 -r 48000 -mididev 1 -send ";pd dsp 1" "$PATCH" $@ &
PD_PID=$!
log "Pure Data started!"
@@ -60,6 +62,5 @@ start_puredata()
flash_leds 1
sleep 0.3
flash_leds 1
-
wait_process $PD_PID
}
Hey, I’d suggest restoring the original version as on https://github.com/BlokasLabs/pisound/blob/patchbox/scripts/common/start_puredata.sh#L54
You may choose to remove the $NO_GUI argument, but it is doing it’s best to see if GUI is up, and if it is - then start PD with GUI enabled. If it doesn’t start with a GUI, for some reason, having a terminal window up in the GUI helps it find which X display to use and start PD with GUI enabled, so if using $NO_GUI, the PD doesn’t show up, try starting a terminal and restarting PD.
Yes, I restored the original file and that works in gui mode so long as I have a terminal window open, although to add to the fun I note that when starting PD from the button, the PD print object will not print to the PD console. (ps -ef tells us the program is being run as root which might have something to do with it?)
The log goes to ‘stderr’ because of -stderr argument, then it shows up in the pisound-btn daemon log:
journalctl -u pisound-btn -f
Or if it was started via the Pisound App, it’d go to the Pisound App Console output tab.
Unfortunately AFAIK there’s no way to get output both in PD and to be sent to other processes at the same time. If you’d like, you may remove -stderr in the launcher script.
Hey, actually that’s pretty cool to see the print output from PD in a separate terminal window. Thank you for your extraordinary level of support (and patience).
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