All I ran in to this issue on stable/11 today . I feel like I saw this in the past but I can't track it down. This is a new install on a brand new Dell r630 fitted with 2x e5-2699v4 cpus . Fresh install of 11.0-RELEASE amd64 install . The install is a ZFS pool on a ssd. I checked out svn stable/11 and built and installed world. The subsequent reboot died with what appears to be an issue with the ZFS EFI loader. I uploaded a screen shot to imgur . http://imgur.com/t9clwXL The Text is a follows Start @ 0xffffffff80302000 ... EFI framebuffer information: addr, size 0x90000000, 0x300000 dimensions 1024 x 768 stride 1024 masks 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000 bi_load_efi_data: GetMemoryMap error 5 _ Any one have any ideas here ? -- mark saad | nonesuch at longcount.org