With Ubuntu 10.04 (Lucid Lynx) on an old Intel D845GBV (PCI/AGP) motherboard and a CompUSA 1244-00000403-010 PCI wireless card with an RTL8185L chip, "pcie_aspm=off" did not prevent the system from hard freeezing (not even magic sysreq keys work) during boot. With "acpi=off" the system boots successfully.
With Ubuntu 10.04 (Lucid Lynx) on an old Intel D845GBV (PCI/AGP) motherboard and a CompUSA 1244-00000403-010 PCI wireless card with an RTL8185L chip, "pcie_aspm=off" did not prevent the system from hard freeezing (not even magic sysreq keys work) during boot. With "acpi=off" the system boots successfully.