I recently installed an SSD. Boot time is actually great. But I'm curious to know why it seems like it idles a lot before actually booting. I notice this on the HDD light, which is off for a few seconds after the Ubuntu logo appears and when it starts blinking you can tell it started booting.
I enabled bootcharts to be generated and I noticed they are different from the ones I see everywhere else because it seems to start doing things after 10 seconds pass.
It's not grub. All times are set to 0 on grub, and the Ubuntu logo appears quickly after I turn on the computer.
Startup finished in 10.282s (kernel) + 9.525s (userspace) = 19.808s
7.010s NetworkManager-wait-online.service 996ms dev-sda5.device 819ms gpu-manager.service 785ms email@example.com 621ms systemd-hwdb-update.service 582ms systemd-fsck@dev-disk-by\x2duuid-17b45d84\x2dc711\x2d4481\x2d8a55\x2d30622ad67311.service 285ms accounts-daemon.service 263ms ModemManager.service [...]
systemd-analyze plot, and this is the output. So It appears those 10 seconds is the kernel loading? so, it's normal then? I swear I've seen Ubuntu machines boot up in literally 2 seconds.
High res: http://goo.gl/Nggroi