Help with Ardour DAW

English Applications
#1

When I install Ardour I get warning with the following message:

“The current user can not execute realtime processes. This will adversely affect audio latency. This system has an audio group and the user is a member. Check /etc/security/limits.conf”

The next warning is "Your system seems to use frequency scaling. This can have a serious impact on audio latency. For best results turn it off, e.g. by choosing the ‘performance’ governor.

can anyone tell me what this application is wanting?

my /etc/security/limits.conf file is

john@localhost:~> cat /etc/security/limits.conf
# /etc/security/limits.conf
#
#Each line describes a limit for a user in the form:
#
#<domain>        <type>  <item>  <value>
#
#Where:
#<domain> can be:
#        - a user name
#        - a group name, with @group syntax
#        - the wildcard *, for default entry
#        - the wildcard %, can be also used with %group syntax,
#                 for maxlogin limit
#
#<type> can have the two values:
#        - "soft" for enforcing the soft limits
#        - "hard" for enforcing hard limits
#
#<item> can be one of the following:
#        - core - limits the core file size (KB)
#        - data - max data size (KB)
#        - fsize - maximum filesize (KB)
#        - memlock - max locked-in-memory address space (KB)
#        - nofile - max number of open file descriptors
#        - rss - max resident set size (KB)
#        - stack - max stack size (KB)
#        - cpu - max CPU time (MIN)
#        - nproc - max number of processes
#        - as - address space limit (KB)
#        - maxlogins - max number of logins for this user
#        - maxsyslogins - max number of logins on the system
#        - priority - the priority to run user process with
#        - locks - max number of file locks the user can hold
#        - sigpending - max number of pending signals
#        - msgqueue - max memory used by POSIX message queues (bytes)
#        - nice - max nice priority allowed to raise to values: [-20, 19]
#        - rtprio - max realtime priority
#
#<domain>      <type>  <item>         <value>
#

#*               soft    core            0
#*               hard    rss             10000
#@student        hard    nproc           20
#@faculty        soft    nproc           20
#@faculty        hard    nproc           50
#ftp             hard    nproc           0
#@student        -       maxlogins       4
@users hard memlock unlimited
@users soft memlock unlimited
john soft memlock unlimited

# End of file

john@localhost:~>
#2

I solved the problem by deleteing @user lines, adding john hard memlock unlimited, and adding john - rtprio 95

#3

@jdcart15:

Maybe, the application was confused by a single group being configured by 2 identical statements for the types “hard” and “soft” –

  • AFAICS, the correct syntax is to specify the item and value once only with the type “-” which implies both types “hard” and “soft” – combined …
    The syntax is explained in the “limits.conf” (5) man page.
#4

I’m thinking that the rtprio 95 was important. The current file that is working has both hard and soft designations. i.e. both “john hard memlock unlimited” and “john soft memlock unlimited”