[PD] Pd on Tiny Core Linux on Raspberry Pi

Peter P. peterparker at fastmail.com
Wed Jul 11 14:07:59 CEST 2018

Replying to myself below.

* Peter P. <peterparker at fastmail.com> [2018-07-11 12:31]:
> Hi,
> * Chris McCormick <chris at mccormick.cx> [2018-07-11 10:41]:
> > Hi,
> > 
> > On 11/07/18 04:13, Peter P. wrote:
> > > Furthermore, does anyone know if the 'tc' user can be added to an
> > > audiogroup, whose permissions could be elevated through
> > > /etc/security/limits.conf (currently not present in piCore).
> > 
> > I think you could do this by settings the rtprio limit directly in:
> > /opt/bootscript.sh
> > 
> > It seems that sysctl and ulimit can't set this but maybe this will help:
> > 
> > https://serverfault.com/questions/889635/seting-rtprio-limit-in-system-without-pam
> Thanks for that link! In this case I could run the patch as root anyway
> I think.
> Interestingly, starting pd from /opt/bootlocal.sh as root at startup
> will make Pd use all of the CPU and hence produce stuttering audio. When
> I change the corresponding line in /opt/bootlocal.sh to start as user tc
> 	sudo -u tc /home/tc/myPdStartupScript.sh
> Pd runs normally.
> > > This might be off-topic, but has anyone managed to create a persisntent
> > > home directory inside /dev/mmcblk0p2 (the ext2/3 partition created by
> > > piCore itself, which I did maximize already)?
> > 
> > You can use the command `filetool.sh -b` to backup a snapshot of the homedir
> > to the SD card and it will be returned to that state on reboot.
> This is what I read from the docs and what I am currently using. Albeit,
> I am having a 300MB sound file in my home dir and it being part of the
> filetool.sh backup immensely slows down startup as the OS has to
> uncompress the audiofile.
Managed to shrink the existing filesystem in /dev/mmcblk0p2 using
resize2fs as well as the partition using fdisk. 
Created yet another partition /dev/mmcblk0p3 with an ext4 filesystem
which now gets mounted as home with the boot option

There might be more elegant ways of doing this, but it works fine for

thanks Chris and list again,

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