Troubleshooting & Common Questions (FAQ)

Having trouble connecting or hearing proximity voice audio? Here are solutions to the most common issues reported by players.

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1. “You are not whitelisted on this server!”

Cause: Your Minecraft username has not been entered into the server whitelist database yet, or there was a spelling typo in your application.

Solution:

1. Check that you submitted your whitelist application at thenga.net/apply.
2. Ensure you have joined the Thenga SMP Discord and claimed your role in #whitelist-status.
3. Verify that your username is exact: Minecraft Java In-Game Names (IGNs) are strictly case-sensitive (Notch ≠ notch). Ping @Admin in Discord #support to verify your mapped IGN.

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2. Voice Chat Shows “Unplugged Cable” Icon 🚫

Cause: The Simple Voice Chat mod in your Minecraft client is unable to establish a UDP handshake with the server’s voice port.

Solution:

1. Verify that the dedicated voice port specified in #server-access is reachable.
2. If using restricted college/office Wi-Fi, institutional firewall policies may occasionally block non-standard UDP ports. Test connecting through a mobile hotspot.
3. Check your local Windows Defender or Antivirus Firewall:
   • Allow javaw.exe (Java platform binary) through Windows Defender Firewall for both Private and Public networks.
4. In Minecraft, press V → ⚙️ Settings → Verify that your selected microphone is enabled and not muted in Windows / macOS system settings.

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3. “Connection Timed Out: getsockopt” or “Unknown Host”

Cause: Your DNS is unable to resolve the server address, or your ISP has stale DNS cache records.

Solution:

1. Verify you copied the latest active hostname directly from the pinned message in #server-access on Discord.
2. Flush your local DNS cache:
   • Windows: Open Command Prompt as Administrator and run ipconfig /flushdns.
   • macOS: In Terminal, run sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder.
3. Try setting your computer’s DNS servers to Cloudflare (1.1.1.1 and 1.0.0.1) or Google (8.8.8.8).

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4. Low FPS or Micro-Stuttering on Java 26.3

Cause: Vanilla Java 26.3 demands modern graphics rendering optimizations.

Solution: We strongly recommend running Fabric with lightweight performance optimization mods:

• Sodium: 200–400% FPS improvement and shader compatibility.
• Lithium: Client-side tick & physics optimization without altering vanilla mechanics.
• FerriteCore: Dramatically reduces Minecraft’s RAM usage by up to 50%.
• Allocate at least 4 GB of RAM in your launcher settings (e.g. -Xmx4G).