Installed the 309 bios update last week and it seemed to resolve the issue but I got fluctuating sounds again 4 days later when I turned the volume up. The issue doesn't come forward when keeping the volume low, seeing which speakers are actually in ...
I sent mine in a couple of weeks ago and got it back with a fresh new install even though I provided support with a login to test the issues. Laptop was still on the config page so I guess they didn't even check if a reinstall helped, first thing I d...