Comment 81 for bug 1752961

Hi Bogdan!
Sorry to hear, that it doesn´t work for you.
I fear that you did add the parameter in the same way then I did. So there might be some other difference.

This is my kernel cmdline (cat /proc/cmdline):
BOOT_IMAGE=/vmlinuz-4.18.0-0.bpo.3-amd64 root=UUID=bda00e2f-ad36-46eb-a81a-cceb7736ab65 ro rootflags=subvol=VOL_ROOT rootdelay=5 apparmor=1 security=apparmor mce=ignore_ce

The apparmor stuff shouldn´t make a difference, it is to my understanding not started at this early stage. I´m not sure about mce=ignore_ce. You might give this a try. I can´t remember the specific issue why I added it, but it was quite likely also related to HP gen8 MircoServer.

Hope this helps you for your further investigations.