@Alex,
Your ACPI DSDT contains the following ACPI code:
Name (GUID, ToUUID ("33db4d5b-1ff7-401c-9657-7441c03dd766") /* PCI
Host Bridge Device */)
Name (SUPP, Zero)
Name (CTRL, Zero)
Name (XCNT, Zero)
Method (_OSC, 4, Serialized) // _OSC: Operating System Capabilities
{
Store (Arg3, Local0)
CreateDWordField (Local0, Zero, CDW1)
CreateDWordField (Local0, 0x04, CDW2)
CreateDWordField (Local0, 0x08, CDW3)
If (LAnd (LEqual (Arg0, GUID), NEXP)) // I believe this
comparison is false...
{
Store (CDW2, SUPP) /* \_SB_.PCI0.SUPP */
Store (CDW3, CTRL) /* \_SB_.PCI0.CTRL */
If (LAnd (LEqual (TBTS, One), LEqual (TNAT, One)))
{
And (CTRL, 0xFFFFFFF7, CTRL) /* \_SB_.PCI0.CTRL */
}
If (Not (And (CDW1, One)))
{
If (And (CTRL, One))
{
NHPG ()
}
If (And (CTRL, 0x04))
{
NPME ()
}
}
If (LNotEqual (Arg1, One))
{
Or (CDW1, 0x08, CDW1) /* \_SB_.PCI0._OSC.CDW1 */
}
If (LNotEqual (CDW3, CTRL))
{
Or (CDW1, 0x10, CDW1) /* \_SB_.PCI0._OSC.CDW1 */
}
Store (CTRL, CDW3) /* \_SB_.PCI0._OSC.CDW3 */
Store (CTRL, OSCC) /* \OSCC */
Return (Local0)
}
Else // ... we end up here, bit 2 is set, indicating
unrecognised UUID.
{
Or (CDW1, 0x04, CDW1) /* \_SB_.PCI0._OSC.CDW1 */
Return (Local0)
}
}
>From what I can understand from your firmware, it tries to match against
a specific UUID and it does not match, so bit 2 is set in the _OSC
return code which informs the kernel that it is not recognized. Hence
stuff like ASPM capabilities are not enabled. If you require ASPM, gave
you tried forcing it to be enabled using the kernel parameter
"pcie_aspm=force" ?
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1349740
Title:
acpi PNP0A08:00: _OSC failed (AE_ERROR); disabling ASPM
To manage notifications about this bug go to:
https://bugs.launchpad.net/linux/+bug/1349740/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
