Hi, Trying to get Jack running with a 2.6.5 kernel. # modprobe -v realtime gid=102 allcaps=1 insmod /lib/modules/2.6.5/extra/realtime.ko gid=102 allcaps=1 FATAL: Error inserting realtime (/lib/modules/2.6.5/extra/realtime.ko): Invalid argument Kernel was built with: CONFIG_PREEMPT=y CONFIG_SECURITY_CAPABILITIES=m CONFIG_SECURITY=y CONFIG_SECURITY_CAPABILITIES=m CONFIG_SECURITY_SELINUX=y When building LSM, I wasn't able de run make as a user : $ make CONFIG_SECURITY_CAPABILITIES=m make modules -C /usr/src/linux SUBDIRS=/home2/al/realtime-lsm-0.1.0 make[1]: Entering directory `/usr/src/linux-2.6.5' *** Warning: Overriding SUBDIRS on the command line can cause *** inconsistencies make[2]: `arch/i386/kernel/asm-offsets.s' is up to date. CC [M] /home2/al/realtime-lsm-0.1.0/realcap.o CC [M] /home2/al/realtime-lsm-0.1.0/commoncap.o LD [M] /home2/al/realtime-lsm-0.1.0/realtime.o /bin/sh: line 1: .tmp_versions/realtime.mod: Permission denied Building modules, stage 2. MODPOST /bin/sh: line 1: ./.__modpost.cmd: Permission denied make[2]: *** [__modpost] Error 1 make[1]: *** [modules] Error 2 make[1]: Leaving directory `/usr/src/linux-2.6.5' make: *** [all] Error 2 But it works when make is run as root. The README file says that only make install has to be run as superuser.