Browsing the motherboards specifications on Asus or Gigabyte website, all the motherboards are tagged as ACPI 1.0 compliant, or in best case 2.0.
Why ?
What is new in ACPI 3, 4 or 5 ?
Phoronix: Intel Has 50 Patches For ACPI/Power In Linux 3.3
The fun for the Linux 3.3 kernel merge window is not over quite yet; Intel this morning published 50 patches for integration into this next Linux kernel that affect ACPI and power management, primarily around ACPI 5.0 support for the Linux kernel...
http://www.phoronix.com/vr.php?view=MTA0NDE
Browsing the motherboards specifications on Asus or Gigabyte website, all the motherboards are tagged as ACPI 1.0 compliant, or in best case 2.0.
Why ?
What is new in ACPI 3, 4 or 5 ?
Wikipedia has some history of ACPI version changes: http://en.wikipedia.org/wiki/Advance...erface#History
Since afaik Ubuntu LTS will upgrade to a new version its graphics drivers and kernel every 6 months - it's not really a problem.