I'm experiencing some weird bugs for some time now. I got Ubuntu 18.04.03 running on my Thinkpad T480s.
It all started with a total freeze. I think this came from a grub update or security update before.
Since then I sometimes have trouble booting my system, especially when switching from connected AC-cable to not-connected (or vice versa) or when rewaking from standby or hibernation.
The system then does not boot at all, not even the grub menu shows, just black.
This does not change even if I try to reboot about 100 times. This drains the battery of course, and sometimes I'm lucky and then ubuntu boots!
I then try to run ubuntu from live USB and to use timeshift to reinstate the system as in before those updates - but, the computer does not even detect the SSD (with the saved timeshift images on it), so that does not work.
I suspected the bug in nvme APST to cause these problems. After researching this, I edited in
nvme.core to a value of
Setting this and if booting works by chance, then this message appears before booting with
could not install PCI config handler for root bridge pci0 among the text.
I checked out the question My computer boots to a black screen, what options do I have to fix it? , but none of it seems to fit.
Now it happened again, I cannot boot up my laptop and I'm stuck! I don't know what to do anymore!
I would be so grateful for any help out there!