11.3.1 Processes hanging

Some versions of Linux have a broken pthreads library. To workaround this set the environment variable LD_ASSUME_KERNEL=2.4.19 before running LispWorks.

LD_ASSUME_KERNEL allows using older versions of pthreads, some of which do not work.

LispWorks 5.1 supports kernel versions 2.4.20 and later.

LispWorks Release Notes and Installation Guide - 18 Mar 2008