I've recently installed Xubuntu 15.04 on my desktop
The video playback was kinda slow and buggy so I installed the nvidia drivers (the gpu is an onboard 7025)
As some people, I get the "ACPI PPC Probe ..." message, but after 20 seconds or so, the system boots just fine, also the video playback is fine and there doesn't seem to be any graphic issues
My question is: Should I be worried about that message popping every time I boot? and what does it exactly means?
I didn't found any answers to that, just workarounds for people who can't pass the message