LL5.2 slowing down, erratic behavior and freezes both in booting and performance

[litecub]

Here are only the "failed" lines from dmesg. If anybody here could help, I have more in store.

Code:

[    0.597391] acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM
[    0.654254] pci 0000:01:00.0: BAR 6: failed to assign [mem size 0x00080000 pref]
[    7.285718] ACPI: \_SB_.PCI0.PEG0.PEGP: failed to evaluate _DSM
[  832.402503] ACPI: \_SB_.PCI0.PEG0.PEGP: failed to evaluate _DSM
[  872.130574] ACPI: \_SB_.PCI0.PEG0.PEGP: failed to evaluate _DSM
[  894.921438] ACPI: \_SB_.PCI0.PEG0.PEGP: failed to evaluate _DSM

Thanks, litecub