1, Long time booting : Failed to connect to lvmetad. Falling back to device scanning.

initramfs-tools-0.130ubuntu3.2 seems to remove the wait time on my system as well!

What I did:

> rm /etc/initramfs-tools/conf.d/resume > sudo update-initramfs -u

 

2,

Fix Brightness Enabling Laptop Specific Drivers

Open the file /etc/default/grub using gedit or any other text editor. Find below line. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash " Change above line to GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"