Comment 93 for bug 1827884

I have been searching for this bug-report for a few weeks now, and I can confirm that I too am experiencing this bug.
After updating from Ubuntu 16.04 LTS to Ubuntu 18.04 LTS, upon first boot I experienced a black screen on my laptop (HP Presario V4000 from 2014). The backlight was still on and so was the fan, though there was no hard-drive activity light. After waiting for around half an hour, I cut the power and rebooted.
Upon the second boot, everything worked fine, leading me to beleive it was simply a problem after updating. The next day, I booted the laptop again and experienced the black screen bug. I soon figured out that it occured every second boot (Roughly, sometimes I would experience the bug twice in a row).
I decided to try “Advanced options for Ubuntu”, and selected “Ubuntu, with Linux 4.15.0-45-generic”. This worked first try. After testing multiple times, I never got a failed boot.
Unfortunately I can confirm that this bug still occurs occasionally when I select:
“Ubuntu, with Linux 4.15.0-54-generic” or
“Ubuntu, with Linux 4.15.0-55-generic”.

I’m fine continuing with what I’m currently doing, but I need to navigate to this option upon every boot, and if a family member were to attempt to use this laptop, they would probably experience the black screen and think they broke something.

I’ll wait until a fix comes out for this, until then I’ll wait and see if anthing else happens.