I previously used X.Org driver for my Ubuntu desktop, and my graphic card is Nvidia GTX 1070, actually I've never been satisfied with my boot time because I use an high-end SSD and the boot time always takes more than 20 s (comparing to my Ubuntu laptop which is Radeon graphics and the same SSD, only takes 9 s).
However, recently I met some problem with compatibility issue of RStudio (always crashed) and I had to change to Nvdia driver as it was described here. So the Rstudio no longer crashes, however I face a very slow boot, after entering the grub (I have dual-boot), it freezes about 30s, and then the PC has a very transient beep (shorter than the boot one), and then I had to wait another 30 s until I can enter the login.
If I run
systemd-analyze, it shows:
Startup finished in 6.560s (firmware) + 6.560s (loader) + 2.848s (kernel) + 38.816s (userspace) = 54.786s graphical.target reached after 38.725s in userspace
Does any one know how to solve this issue?