Description of problem:
After adding a filter to ensure that LVM does not access multipath member devices, the mpath device VGs and LVs are not properly activated on boot.

Version-Release number of selected component (if applicable):
lvm2-2.02.40-6.el5

How reproducible:
Always.

Steps to Reproduce:
1. I configure multipath devices.
2. Add filter to only look at the mpath devices:
/etc/lvm/lvm.conf:
filter = [ "a|/dev/mpath.*|", "r/.*/" ]
preferred_names = [ "^/dev/mpath/", "^/dev/mapper/mpath" ]

3. Setup LVM on mpath devices. Activate and mount. Configure fstab.
4. Reboot.
  
Actual results:
VGs/LVs are not active on reboot. Manual intervention post-boot is required.

Expected results:
VGs/LVs are activated, and able to be mounted via fstab.

Additional info:
Everything works if manually activated and mounted. With the filter removed, everything is properly activated, but multipath failover does not work correctly. LVM seems that is uses the non-mpath devices and then when paths are failed mounts start rejecting I/O. With the filter, everything works correctly with regards to multipathing but manual intervention post-boot is required to mount everything.