4

When I switch on my laptop, it boots and goes into blinking stage. Keyboard and mouse work.

After do a force shutdown using power button and boot again, this problem is gone and it boots normally.

I did boot-repair and it didn't help me either. Or is this a common bug in 18.04

Any suggestions about installing ubuntu-desktop again as suggested here?

I did a version upgrade from Ubuntu 16.04 to 18.04. My Laptop is hp with AMD-A6 and Readon-R4 graphics.

Sachith Muhandiram
  • 215
  • 1
  • 6
  • 20

3 Answers3

3

If you happen to have an AMD graphics card, try the solution proposed in this answer:

I solved it myself by using amdgpu.dc=0 as a boot parameter.

To do this, edit the file /etc/default/grub, for example using

sudoedit /etc/default/grub

Find the line beginning GRUB_CMDLINE_LINUX_DEFAULT and add the text amdgpu.dc=0 between the double quotes (""). Leave any other parameters as they are. For example, you may end up with a line like this:

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amdgpu.dc=0"

Save the file and exit, and then run

sudo update-grub

to write the configuration, and reboot.

BeastOfCaerbannog
  • 16,703
Sean
  • 163
2

While the Ubuntu screen was flickering I hit cntl-alt-del and it rebooted and when to the boot screen to select an OS. I selected Ubuntu and it booted without problems.

scvblwxq
  • 21
1

The easiest way is to:

  1. Boot your Linux in ("Recovery Mode")
  2. After going into Recovery mode, select "Update GRUB"
  3. Press ENTER on "UPDATE GRUB"
  4. Reboot

Worked for me, I had a blinking screen on my Ubuntu 18.04 with Intel graphics, but as long as you are on X drivers (by default and recommended strongly - by my opinion) you'll be fine, if not please let me know there is a way around. But, as I said, these 3-4 steps will resolve your issue with blinking splash/ boot screen when "Ubuntu is loading".

Thank you.

Milanovic Boris
  • 11