[PD] pd-0.48.1 trouble getting started

David Medine dmedine at ucsd.edu
Tue Jan 9 12:04:56 CET 2018

aha. I was simply (mistakenly) under the impression that one had to have 
super user priv to get the rt priority. I didn't know that running 
programs as root was so verboten.

I'm not getting dropouts, I simply wanted to have all the goodies if 
need be.

On 1/9/2018 9:49 AM, IOhannes m zmoelnig wrote:
> On 2018-01-09 06:37, David Medine wrote:
>> This may have already been addressed and in my tendency to ignore pd
>> list traffic I missed the explanation, but here is what is going on.
>> I am running a fairly fresh install of Fedora 26. I downloaded the
>> source to Pd, installed alsa-lib-devel and tk (for wish), then built pd
>> using makefile.gnu.
> i'm not sure whether makefile.gnu is actually still used by anybody
> (including miller). the suggested way is to use autotools.
> $ ./autgen.sh && ./configure && make
>> Everything works when I start pd without super user
>> privileges, except priority 92 scheduling is denied me.
> add your user to the "audio" group and add the following to a file like
> /etc/security/limits.d/audio.conf
>> @audio   -  rtprio     95
>> @audio   -  memlock    unlimited
>> When I start pd
>> using sudo,
> oh my, thou shalt never run random applications as root.
> moreso, thou shalt not run GUI applications as root.
> btw, why do you think that you *must* have realtime priorities? do
> youget dropouts when running without?
>> pd doesn't start and I get the following errors on the
>> command prompt:
>>>> sudo ./pd
>> No protocol specified
>> No protocol specified
>> application-specific initialization failed: couldn't connect to display
>> ":0.0"
>> These messages are not particularly helpful for me. Anybody know what is
>> wrong?
> Pd you cannot connect to the X server (the display server).
> does it work for other applications?
> the standard test used to be xclock (`sudo xclock`), but i'm not sure
> whether it is installed on your system.
> searching the web, i found a few suggestions how to solve the problem
> (not fedora specific):
> https://askubuntu.com/questions/175611/
> https://forums.opensuse.org/showthread.php/405624-sudo-doesnt-open-X-programs
> but to re-iterate: you should never run Pd as root. instead, allow your
> user to request realtime priviliges.
> fgbmadr
> IOhannes
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