Jim accidently sent this to me privately instead of to the list. He confirmed this in further private email. (I normally don't like copying private email to a public list.) ---------- Forwarded message ---------- From: Jim Ruxton <jim.ruxton@gmail.com> Date: Sat, 6 Nov 2021 10:24:43 -0400 Subject: Re: [GTALUG] Command doesn't work in script but works on command line? I am running the script by double clicking on it after making it executable and setting scripts to run this way via nautilus.  All the other scripts I wrote run fine this way. I tried running the script from the command line and that does work. So it is only not running correctly when activated by the mouse? Still a mystery. Jim On 2021-11-06 10:04 a.m., D. Hugh Redelmeier wrote:

| From: Jim Ruxton via talk <talk@gtalug.org>

| I'm having trouble with a simple script. It adds a second sounccard. This | command works on the command line but not in a script. Any ideas why?

How are you running that script? Is it from a cron script or something like it? Does your script work when invoked from your command line?

I haven't paid attention to JACK, but I assume that each Linux user session has some kind of jack context -- plumbing done by one user should not affect the plumbing of another user. I don't really see this issue addressed in the first few jack documents I read.

My guess is that your script is modifying a different context from the one you are observing. That's really vague and hand-wavy, but that's the direction I'd investigate.