lsmod Module Size Used by st 68736 0 sr_mod 42916 0 cdrom 64784 1 sr_mod ipv6 464336 32 apparmor 102332 0 aamatch_pcre 34720 1 apparmor loop 41376 0 dm_mod 115288 3 ibmveth 42600 0 sg 69064 0 ibmvscsic 46952 3 pdc202xx_new 32176 0 [permanent] sd_mod 41264 5 scsi_mod 221512 5 st,sr_mod,sg,ibmvscsic,sd_mod
If the module you wanted listed above wasn’t in use, you could unload and load it to refresh:
modproble $modname ; modprobe $modname