Ubuntu – Chrome freezes on freshly installed Ubuntu 18.10

In my case, the remedy was to remove acpi-call-dkms package and increase graphics' memory to 512MB in BIOS (Ubuntu 18.04, Lenovo X250, two monitors via DP + one monitor via VGA). Without the external monitors the laptop didn't freeze even with acpi-call-dkms.

acpi_call complains:

acpi_call: module verification failed: signature and/or required key missing - tainting kernel

I have exactly the same problem on (probably) the same laptop (in my country it's shipped simply as Dell Inspiron G3 15' with varying specs):

• Intel Core i7-8750H,
• NVIDIA GeForce GTX 1050Ti,
• 32 GB DDR4 RAM,
• dual disc SSD + HDD.

I may add that it came with Windows 10 pre-installed, but I didn't want to keep it, so I didn't even try to set up a dual boot, I've just formatted the whole disc. Although I did need to change a BIOS setting (RAID to AHCI) for Ubuntu to be able to see the SSD disc.

So if I may add a few points:

1. First I've tried to install Ubuntu 18.10. It has installed fine, but then froze after hitting the restart button on the box saying that the installation is over. I've done a hard reboot and tried to run the OS. It has worked fine, I was able to log in, but immediately after logging in it froze on an empty, this pinkish-violet screen.
2. Then I've tried to reinstall Ubuntu 18.10. I've formatted the disc again and did everything as before, with the exception that I've waited for a few minutes after hitting the restart button on the aforementioned box. And in fact that changed something, because that black screen which OP posted above appeared with exactly the same messages. They've appeared gradually, not all at once, sometimes taking quite a long time, but after that one about "psmouse serio1" at the bottom nothing more happened for over half an hour, so I did a hard reboot again.
3. Then I've decided to install Ubuntu 18.04 LTS. Again I've formatted the disc, again the installation went fine until that very last step when it again froze upon hitting the restart button. This time however, after doing another hard reboot, the OS started fine, I've successfully logged in and was able to work for a minute or two. Unfortunately, after that time the OS froze again and this time I'm out of ideas about what I should do next.

EDIT: I've installed Ubuntu Gnome 16.04 LTS and it seems to be working fine, although the touchpad lost the ability to recognise "taps", so if one wants to click using it, one needs to physically push it, taps won't do it. For the time being it must suffice, but half-usable touchpad and outdated software notwithstanding, support for Ubuntu 16.04 ends in 4 months, so this isn't a long-term solution.