Searching for sim data...

[phasA1000]

Hi Spacefreak18,

I’m trying to get Monocoque working with ACC now on CachyOS (Arch) via Steam/Proton.

Current state:

• ACC runs fine under Proton Experimental
• /dev/shm/acpmf_physics, acpmf_graphics, acpmf_static, acpmf_crewchief are created
• simd starts and lsof shows it has the acpmf_* files open
• audio hardware / resonators work independently
• but monocoque play always stays at:
  Searching for sim data... Press q to quit...

So Monocoque never seems to receive usable live telemetry (no RPM / no active sim state).

/tmp/simd.log repeatedly shows:

• Detected simulator id 805550, starting appropriate bridge if necessary.
• Could not find one or all of the necessary environment variables. Found <tool paths> <compatdata path> (null)

What I need to know:

1. What is the exact intended startup order for ACC on Linux/Proton?
2. Is acbridge.exe required for ACC, or should ACC work directly?
3. Which exact environment variables does simd expect here?
4. If simd has acpmf_* open but monocoque still never leaves “Searching for sim data…”, what should I check next?

On Bazzite, Monocoque at least reached a state where it showed live RPM from ACC.
On CachyOS, it never leaves “Searching for sim data...”, even though simd opens the acpmf_* files.
So the key difference is not audio hardware, but that Monocoque never enters a real live telemetry state on CachyOS.

Thank you very much in advance!

[Spacefreak18]

I imagine if you run hexdump /dev/shm/acpmf_physics you will see all zeros... when you see data, you'll know it's working.

The part you're missing is you need these compatibility exes

unzip them and then add this to your acc launch command in steam
SIMD_BRIDGE_EXE=~/path/to/acbridge.exe %command%

this is the environment variable simd is expecting. And point it to wherever you extracted the acbridge.exe in that zip file.

https://spacefreak18.github.io/simapi/simd_usage

[Spacefreak18]

https://developer.valvesoftware.com/wiki/Command_line_options#/media/File:Steam_launch_options_example_-_Half-Life_2.png

this is what i mean by launch options in steam

[Spacefreak18]

if you had rpms shown in monocoque in bazzite, you must have had this all working before... even then.

Not all of the data available in AC is available in ACC. But I imagine all the data you need will be so it's not that.