dms-lact-profiles-widget

DankMaterialShell bar widget to switch LACT GPU profiles. The bar pill shows the active profile; the popout is a button group (same control as the DMS power-profile selector) with Default plus every profile in /etc/lact/config.yaml. Below it, each profile's power limit per GPU and their total, read straight from the config.

Warning

This is my personal setup, published as is. Adjust it to yours before installing. It does not use LACT the normal way: lact-apply stops and masks lactd and runs the LACT daemon only for a few seconds to apply a profile. That suits a machine where another tool (CoolerControl here) owns the fans and LACT should only set power caps and clocks. If you rely on lactd running (LACT fan curves, automatic profile switching, the LACT GUI at any time), this will break that. Read system/lact-apply before you run it as root.

What you need to adjust

File	What to change
system/sudoers-lact-apply	Replace philipp with your user name.
/etc/lact-apply.conf (optional, from system/lact-apply.conf.example)	Your GPU labels by PCI address, the fan service to restart (if any), LACT warnings to hide. Without it, GPUs show as GPU0, GPU1, ... and no service is restarted.
Plugin settings (DMS Settings, Plugins, LACT Profiles)	"First profile": the profile shown first (Default takes its slot). Empty keeps the config order.

Profiles themselves are made in LACT (sudo lact-apply edit, then the LACT GUI); the widget just lists whatever is in /etc/lact/config.yaml.

How it works

• lactProfiles/ is the DMS plugin. It runs lact-apply --list to read profiles, lact-apply --caps to read their power limits, and sudo -n lact-apply <name> to switch.
• system/lact-apply (install to /usr/local/bin/lact-apply) sets current_profile, starts lact daemon once to apply the settings, then SIGKILLs it. A clean stop would make LACT reset the caps to stock, and a running daemon re-applies (and resets fans) on every display change. Afterwards it restarts FAN_DAEMON if set, because LACT hands the fans to firmware auto. lact-apply edit keeps the daemon running until Enter so the LACT GUI can edit settings. Profile names must match exactly; base = no profile.
• system/sudoers-lact-apply goes to /etc/sudoers.d/lact-apply (mode 440) so the widget can switch without a password. It allows only this one script.

Install

# after adjusting the files above
sudo install -m 755 system/lact-apply /usr/local/bin/lact-apply
sudo install -m 644 system/lact-apply.conf.example /etc/lact-apply.conf   # optional, edit it
sudo install -m 440 system/sudoers-lact-apply /etc/sudoers.d/lact-apply && sudo visudo -c
ln -s "$PWD/lactProfiles" ~/.config/DankMaterialShell/plugins/lactProfiles
dms ipc call plugins enable lactProfiles

Optional: run lact-apply once at boot (e.g. a oneshot systemd unit), since lactd no longer applies settings on startup.

Requires LACT, python3 with PyYAML (for --caps), and DMS >= 1.2.

License

MIT