Acer Ryzen Helios AC Fix

Purpose

Acer Predator Helios 500 Ryzen edition notebooks do not detect the AC adapter as being plugged in in Linux, forcing the system into a low power state and robbing performance from the system. This workaround diables the buggy power states on login to improve performance.

The upstream bug report is drm/amd#999, and its resolution would obsolete this workaround.

Installation

Set kernel flags to enable DPM manual state changes.

Using your prefered editor modify your grub to include the ppfeaturemask flag that enabled AMDGPU overclocking. I have used nano in this example.

sudo nano /etc/default/grub

add amdgpu.ppfeaturemask=0xffff7fff to the line GRUB_CMDLINE_LINUX_DEFAULT

sudo update-grub
reboot

Systemd

Move the files to the required directories.

Clone the repository, then link the files in the appropriate system locations:

cd <clone dir>
sudo ln acfix.sh /usr/local/sbin/
sudo ln acfix.service /etc/systemd/system/

(If your root filesystem and clone partition differ, use cp instead of ln.)

Using the Service

To enable the workaround:

sudo systemctl enable acfix
reboot

Disclaimer

Any damage resulting from you running this service is your own damn fault. Leave me alone about it.