I recently purchased an Acer Travelmate P6 (TMP614-51-50FJ), got a larger nvme ssd, and dual booted linux (xubuntu 19.04) on it. The laptop is beautiful, and I love it, but there does seem to be an issue that I cannot find a solution to. When the system is suspended/sleeping, the battery life was pretty terrible, maxing out at 16 hours when asleep. (my chromebook gets 2 weeks+) I investigated a bit and found this was caused by the speakers and the speaker driver circuitry. They are warming up to about 30 f (17 c) above ambient and consuming 2-5 watts when the laptop is asleep. After some investigation, it appears to be an issue with suspending the speakers, which occurs 6 seconds after playing any sound. Using an oscilloscope, I looked at exactly what was happening to the speakers, and there seems to be a 1.2 MHz square wave on both speakers with a peak amplitude of about 13v. After some further investigation, overriding this speaker suspend feature fixes the situation when the OS is running, but does not when it is sleeping. Additionally when it is overridden, there seems to be a high-pitched whine between 16 KHz and 19.5 KHz. Windows has the same wine, but it does not have the 1.2 MHz square wave using the battery and possibly damaging the speakers.
I also made a post on the Ubuntu forums, where more diagnostic information can be found: https://ubuntuforums.org/showthread.php?t=2425921
Any information that could help lead to a solution is greatly appreciated.