Fix Double Dragon MAME Input Issue

I'm seeking help to resolve an input issue with Double Dragon on MAME for Linux. The game starts, but the P1 Start and P2 Start buttons don't work when using an arcade stick.

Requirements:
- Experience with MAME on Linux
- Familiarity with arcade stick configuration
- Ability to troubleshoot input issues

Ideal Skills and Experience:
- Linux and MAME expertise
- Arcade stick configuration knowledge
- Problem-solving skills