It adds several seconds to a boot time already slowed by vboxdrv. This is the end of the boot from dmesg:
[ 46.262355] atl1c 0000:03:00.0: irq 43 for MSI/MSI-X [ 46.262463] atl1c 0000:03:00.0: atl1c: eth0 NIC Link is Up<100 Mbps Full Duplex> [ 51.043928] ip_tables: (C) 2000-2006 Netfilter Core Team [ 51.299484] nf_conntrack version 0.5.0 (16384 buckets, 65536 max) [ 121.898333] vboxdrv: Found 2 processor cores. [ 121.898453] vboxdrv: fAsync=0 offMin=0x473 offMax=0x9ce [ 121.898515] vboxdrv: TSC mode is 'synchronous', kernel timer mode is 'normal'. [ 121.898517] vboxdrv: Successfully loaded version 4.1.18_Ubuntu (interface 0x00190000). [ 122.785489] vboxpci: IOMMU not found (not registered) [ 140.915652] init: plymouth-stop pre-start process (4519) terminated with status 1 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/800701 Title: init: plymouth-stop pre-start process terminated with status 1 (plymouth-stop called multiple times due to race?) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/plymouth/+bug/800701/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs