Comment 32 for bug 1748450

R. Becke (subscribe-becke) wrote :

I had the same issue with Ubuntu 18.40 (final Beta) and HP EliteBook 850 G5 and reported the bug 1762814 and the solution (or rather workaround) for me was to blacklist amdgpu and this gnome shell crash, all the boot errors and suspend issues were gone.

How to blacklist amdgpu is described here: https://unix.stackexchange.com/questions/360709/how-to-blacklist-amdgpu

sudo vi /etc/modprobe.d/blacklist.conf
...
blacklist amdgpu
...

sudo update-initramfs -u

I've as well made my comment on this here: https://askubuntu.com/questions/769581/ubuntu-16-04-not-waking-up-after-suspend-on-hp-elitebook-8440-and-spamming-kern/1023798#1023798