Support for arch linux and multiple "deej"-s

[iseal56]

Hello! I am working on building my own 2 deejs as i needed more than 3 sliders but my printer isn't big enough.
I want to ask, is there a way to make them both work or am I restricted to only 1?
Can I make this run on arch, or is it a ubuntu-only thing?

[Cose-3D]

You can't use more than one controller with deej but you can make a 2 piece box for your controller with a small printer instead of printing a single big box.

[AvaKliment]

This is what I am using for EndeavourOS Plasma KDE

https://github.com/czanescu/deej-with-libayatana-compatibility

I didn't need to install any of the prerequisites, but as of some linux update in the past week I'm unable to suspend my system with the software open.

[Cose-3D]

This is what I am using for EndeavourOS Plasma KDE

https://github.com/czanescu/deej-with-libayatana-compatibility

I didn't need to install any of the prerequisites, but as of some linux update in the past week I'm unable to suspend my system with the software open.

That's because the default arduino deej firmware endlessly sends a stream of serial values. You can disable the device waking up the computer if you want.

echo "USB0" | sudo tee /proc/acpi/wakeup

https://wiki.archlinux.org/title/Power_management/Wakeup_triggers

[AvaKliment]

My devices is on ttyACM0. It shows the device path as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/3-3.3:1.0/tty/ttyACM0

I am unable to find the exact file I need to change.

That location has files titled autosuspend_delay_ms control runtime_active_time runtime_status runtime_suspended_time

I am unable to make files in the directory /sys/devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/3-3.3:1.0/tty/ttyACM0 even with chmod 777 or in root

[Cose-3D]

My devices is on ttyACM0. It shows the device path as /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/3-3.3:1.0/tty/ttyACM0

I am unable to find the exact file I need to change.

That location has files titled autosuspend_delay_ms control runtime_active_time runtime_status runtime_suspended_time

I am unable to make files in the directory /sys/devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/3-3.3:1.0/tty/ttyACM0 even with chmod 777 or in root

I don't know I don't use arch. Ask to a LLM. This is the Claude output with your issue:

The issue is that your guy is looking in the wrong directory! The wakeup file is not located in the tty device directory, but in the parent USB device directory.

Correct Solution

Based on the path he provided: /devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/3-3.3:1.0/tty/ttyACM0

He needs to go back in the hierarchy to the USB device:

# The wakeup file is located here (USB device):
echo "disabled" | sudo tee /sys/devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/power/wakeup

# Or even further back (USB port):
echo "disabled" | sudo tee /sys/devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/power/wakeup

Easier Method to Find It

Instead of navigating manually, he can use:

# Find all wakeup files related to ttyACM0
find /sys -name "wakeup" | grep -E "(3-3\.3|3-3)" | head -5

# Or starting from the device
cd /sys/devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/
find ../.. -name "wakeup" -type f

Verify It Works

# First check the current status
cat /sys/devices/pci0000:00/0000:00:01.2/0000:02:00.0/0000:03:08.0/0000:07:00.3/usb3/3-3/3-3.3/power/wakeup

# Should show "enabled" or "disabled"

Why He Can't Create Files

Files in /sys are virtual (managed by the kernel), so you can't manually create or delete them - they only exist if the kernel exposes them. The wakeup file only exists at levels of the USB hierarchy where it makes sense (USB device, not tty interface).

The trick is to go up the hierarchy to the actual USB device level!

[iseal56]

With all due respect I don't think going into an issue and just copy pasting from an LLM will be of any use.

[AvaKliment]

Yeah, LLM's are notoriously bad at giving accurate responses.