Add G-Mode key support

[mhalano]

Add G-Mode key, usually Fn+F9.

Closes #30824

[mhalano]

I put prog2 as G-Mode since we already have a prog1 in place.
Please let me know if I should change this.

[mhalano]

@yuwata Thanks for approving my PR. What do you think in the future to change from prog2 to gmode? My idea is the performance mode beinge enabled when the user presses the key.

[yuwata]

@yuwata Thanks for approving my PR. What do you think in the future to change from prog2 to gmode? My idea is the performance mode beinge enabled when the user presses the key.

OK if it works, but we usually use progX for such special keys. So, prog2 sounds also OK to me.

[mhalano]

@yuwata Thanks for approving my PR. What do you think in the future to change from prog2 to gmode? My idea is the performance mode beinge enabled when the user presses the key.

OK if it works, but we usually use progX for such special keys. So, prog2 sounds also OK to me.

prog2 seems passed to X to open a program or something, but I have bigger plans: I want to find a way to turn on and off the power mode using this key, since it's what really does. On Linux, G-Mode is already enabled when I set performance mode, so the idea is doing this pressing a key. Stay tuned.

[yuwata]

I am not familiar, but to change the power mode, a tiny program or script needs to be invoked when the key pressed? So, I still think prog2 is enough. No?

[mhalano]

Yeah, but I would like to do lower level, probably as a quirk or something with systemd directly, to make this a usable feature, keeping prog* for things that user will touch over GUI.
But for now it was great. See you on my next issues and PRs. Have a great weekend.

[kuu-rt]

Hi @mhalano,

This key (0x68) is also present on Alienware laptops and serves the same purpose. I submitted a similar PR that you can find here #37388.

There is one difference though, a release event has to be emulated. Hence why I mapped it to !prog3 instead of prog3. Isn't this the case for G-Series laptops too?

[mhalano]

@kuu-rt thank you for your contribution. What would be a release event in this case? On my Dell G I just press the key and e test reports the scan code. How this is different on Alienware?