I have the same issue with an old DELL Dimension C521, after a little debugging I've found that the problematic component is the PCI, it booted using:
pci=noacpi
This system in particular doesn't has ACPI-based fan control so there isn't risk turning the acpi off. I'd followed:
https://wiki.ubuntu.com/DebuggingACPI
I have the same issue with an old DELL Dimension C521, after a little debugging I've found that the problematic component is the PCI, it booted using:
pci=noacpi
This system in particular doesn't has ACPI-based fan control so there isn't risk turning the acpi off. I'd followed:
https:/ /wiki.ubuntu. com/DebuggingAC PI