Ubuntu 18.04 Won't Boot on Battery Power
Older Acer Aspire laptop with i3 processor. Ubuntu loads fine when plugged in wall, but won't boot with only battery power. I see the Acer splash with bios information, but it turns off before ever seeing the purple Ubuntu boot up screen. Had no problems with Ubuntu 16.x. Laptop recently got new battery.
Any assistance appreciated.
Solution
This link worked for my HP laptop.
1) Modify the GRUB_CMDLINE_LINUX_DEFAULT
kernel variable in /etc/default/grub:
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash dis_ucode_ldr"
2) $ sudo update-grub
3) Reboot.
dis_ucode_ldr
stands for "disable microcode loader"