Legion Go S Support

@antheas
Hello!

I will be receiving a Legion Go S tomorrow, and I would like to help add hardware support to Bazzite (I assume through HHD). Can you already now tell me what you need me to do so that I am prepared? Something about dumping controller info from Windows?

I am a software engineer by trade so I am comfortable working with command lines etc.

Regards
Mads

Mads KOP•1/15/25, 2:48 PM

Yep

Mads KOP•1/15/25, 2:48 PM

Had the OG, not a fan...

Mads KOP•1/15/25, 2:56 PM

Gotcha

antheas•1/15/25, 2:57 PM

What's fyn

antheas•1/15/25, 2:59 PM

It's the 16gb unfortunate

antheas•1/15/25, 3:00 PM

Well, maybe we can make due. All you need to do is some Wireshark recordings

antheas•1/15/25, 3:02 PM

I also don't feel like dual booting tomorrow

Original message was deleted

HikariKnight•1/16/25, 2:05 PM

since antheas is flying today idk when he will be on, but all i do know is you need wireshark with usbpcap

and thats where my knowledge stops

but you can maybe have a look at #Attempt to add MSI Claw support? to see what he needs for basic controller support maybe (sorry its a very long thread and its the one i remember on top of my head)

Mads KOP•1/16/25, 2:06 PM

Alright, cool. I'll check it out if windows update ever completes

Mads KOP•1/16/25, 2:06 PM

here it is btw

Mads KOP•1/16/25, 4:37 PM

Installed bazzite on an external ssd. Controller works once setup is completely done and inside steam

Mads KOP•1/16/25, 4:37 PM

Steam does say something about it being unsupported hardware

Mads KOP•1/16/25, 4:38 PM

Something about steam deck prototype ev2?

Mads KOP•1/16/25, 4:42 PM

hhd has "Powersave", "Balance" and "per

Mads KOP•1/16/25, 4:42 PM

"Performance"

Mads KOP•1/16/25, 4:42 PM

profiles

Mads KOP•1/16/25, 4:43 PM

audio works fine

Mads KOP•1/16/25, 4:45 PM

There is a VRR toggle in the QAM but it says "Display State: VRR Disabled" below it no matter what its set to

Mads KOP•1/16/25, 4:47 PM

Fan ramp-up/down seems quite aggressive but it seems to be in Windows as well, maybe a BIOS setting

MMads K Fan ramp-up/down seems quite aggressive but it seems to be in Windows as well, m...

antheas•1/16/25, 5:07 PM

It's not anyway we'll fix it

antheas•1/16/25, 5:09 PM

PR the acpi tables like so https://github.com/hhd-dev/hwinfo/blob/21b7442219922233c41c0568995214ba92873f69/devices

GitHub

hwinfo/devices at 21b7442219922233c41c0568995214ba92873f69 · hhd-de...

Contribute to hhd-dev/hwinfo development by creating an account on GitHub.

antheas•1/16/25, 5:09 PM

Get to master internet is spotty

antheas•1/16/25, 5:09 PM

And follow instructions there

antheas•1/16/25, 5:09 PM

Then send me the sapientia dll from windows so I can look at the functions

antheas•1/16/25, 5:09 PM

Then do Wireshark recordings of messing with the RGB and gyro and take images of legion space. Start with one recording that has a bit of everything

antheas•1/16/25, 5:09 PM

If I'm on my computer by then I'll tell you what to do for the other recordings

antheas•1/16/25, 5:09 PM

Otherwise start doing the functions one by one and writing down what you changed

antheas•1/16/25, 5:10 PM

I also hAve a Jupiter notebook you can use to control the controllers with the sapientia dll

antheas•1/16/25, 5:10 PM

So after you use a decompiler to get the function definition you can use Wireshark to find the commands

Mads KOP•1/16/25, 6:56 PM

thx, will take a look

Mads KOP•1/16/25, 7:48 PM

heres the linux bit

legion-go-s.zip409.71KB

Mads KOP•1/16/25, 7:48 PM

i couldnt get any hid output from the dpad

Mads KOP•1/16/25, 7:48 PM

As well thats not reckognised by bazzite as is

Mads KOP•1/16/25, 7:48 PM

will move on to wireshark

antheas•1/16/25, 7:48 PM

we only need the legion buttons

antheas•1/16/25, 7:49 PM

that will need a kernel patch and xpad rule

antheas•1/16/25, 7:49 PM

send a bug report from hhd

Mads KOP•1/16/25, 7:49 PM

Legion buttons are in hid/controller along with the rest

Mads KOP•1/16/25, 7:49 PM

you dont need wireshark then?

antheas•1/16/25, 7:49 PM

i need wireshark in windows

antheas•1/16/25, 7:49 PM

for rgb and gyro

Mads KOP•1/16/25, 7:50 PM

I got gyro output on one of the hids as well

Mads KOP•1/16/25, 7:50 PM

but will move on to windows

Mads KOP•1/16/25, 7:50 PM

wish me luck

antheas•1/16/25, 7:50 PM

the thing with the gyro is that we need to be able to turn it on

Mads KOP•1/16/25, 7:50 PM

got it

antheas•1/16/25, 7:51 PM

thats not a legion feature per say but it should be in the dll

Mads KOP•1/16/25, 7:51 PM

wheres that dll located?