It works fine here with Perl 5.10. Linux, and alsasound.
The first thing is determine if the module is buggy on your system, or if there is some other problem.
The module code causing it is:
if (defined $len || ($! != EAGAIN && $! != EINTR)) {
die "connection to mpg123 process lost: $!\n" if $len == 0;
Does the mpg123sh program (in the module's base directory) run? Maybe
you are having trouble with filenames being passed in the pipes, like unicode mismatches or similar glitches.
You said you ran the shell "mpg123 -R a.mp3" first. Could that interfere somehow? Like the soundcard being "in use"?
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