I assembled a new system and was surprised that only 1 core is in use.
At root console it proves only one is available.
I am wrong that this is a support file from AMD otherwise How to change?
Do you have "acpi=off’ in your kernel command line? If yes, renove it. Also check your Bios settings regarding acpi…
I deleted nolapic. Now it’s completely broken during startup.
You need a picture from a black screen?
Sorry for the hard words.
I’ve startet Linux with walnut creek and 25 floppy disks. It’s going more difficult to start up instead to be more easy.
I need this parameter otherwise no chance.
nomodeset doesn’t influence the core amount
noapic shall only influence search PCI
Mainboard ASRock ab350 with 8.02 bios
Problem solved.
I changed parameter at BIOS