I have a Lenovo U430 IdeaPad, 4th gen i7, Intel Haswell-ULT Integrated Graphics, Intel 7260 Wireless, Crucial SSD.
It had Win8 when I bought it and I replaced it with Ubuntu 12.04, 64-bit, UEFI mode.
When I boot the machine, I get the Lenovo screen (~3 sec), the grub screen (~10 sec timer), then default Ubuntu boot starts. Sometimes I get the Ubuntu log-on screen right away (~5 sec, after adjusting screen brightness from min to max). Yeah!
Sometimes I get a dark purple, grub-like screen for > 3 minutes and then the Ubuntu log-on screen (after brightness adjustment). Sometimes I get a black screen with blinking cursor for > 3 minutes and then the Ubuntu log-on screen (after brightness adjustment).
If I get either the dark purple or black screen, and I do a hard reset (power switch), then I get the log-on screen within 5 seconds of grub screen. Yeah!
The same patterns hold for legacy boot configuration.
Three related questions: (1) Is there a way to fix this so that I get the normal rapid boot every time? (2) If not, will I damage my hardware or software if I do a hard reset every time the boot process stalls? (3) Should I switch to 13.10, or wait until 14.04?
Thanks for your help.