Installed Elementary OS on Lenovo R61 laptop. Takes over 5 minutes to start. Black screen filled with flip_done timed out error messages before splash screen displayed. Once started it takes exactly one minute from the time the password is entered until the desktop is displayed.
This is a bug. To avoid delay you can use workaround. From terminal run:
sudo nano /etc/default/grub
Then add the kernel boot parameter:
video=SVIDEO-1:d, so it will look like this:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash video=SVIDEO-1:d"
Above answer grabbed from https://askubuntu.com/a/916112/907048