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Hytale-F2P/docs/STEAMDECK_DEBUG_COMMANDS.md
sanasol 9ec97f9d33 fix: Steam Deck/Ubuntu crash - use system libzstd.so
The bundled libzstd.so is incompatible with glibc 2.41's stricter heap
validation, causing "free(): invalid pointer" crashes.

Solution: Automatically replace bundled libzstd.so with system version
on Linux. The launcher detects and symlinks to /usr/lib/libzstd.so.1.

- Auto-detect system libzstd at common paths (Arch, Debian, Fedora)
- Backup bundled version as libzstd.so.bundled
- Create symlink to system version
- Add HYTALE_NO_LIBZSTD_FIX=1 to disable if needed

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2026-01-27 19:40:42 +01:00

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# Steam Deck / Linux Crash Fix
## SOLUTION: Use system libzstd
The crash is caused by the bundled `libzstd.so` being incompatible with glibc 2.41's stricter heap validation.
### Automatic Fix
The launcher automatically replaces `libzstd.so` with the system version. No manual action needed.
### Manual Fix
```bash
cd ~/.hytalef2p/release/package/game/latest/Client
# Backup and replace
mv libzstd.so libzstd.so.bundled
ln -s /usr/lib/libzstd.so.1 libzstd.so
```
### Restore Original
```bash
cd ~/.hytalef2p/release/package/game/latest/Client
rm libzstd.so
mv libzstd.so.bundled libzstd.so
```
---
## Debug Commands (for troubleshooting)
### Check libzstd Status
```bash
# Check if symlinked
ls -la ~/.hytalef2p/release/package/game/latest/Client/libzstd.so
# Find system libzstd
find /usr/lib -name "libzstd.so*"
```
### Binary Validation
```bash
file ~/.hytalef2p/release/package/game/latest/Client/HytaleClient
ldd ~/.hytalef2p/release/package/game/latest/Client/HytaleClient
```
### Restore Client Binary
```bash
cd ~/.hytalef2p/release/package/game/latest/Client
cp HytaleClient.original HytaleClient
rm -f HytaleClient.patched_custom
```
---
## Environment Variables
| Variable | Description | Example |
|----------|-------------|---------|
| `HYTALE_AUTH_DOMAIN` | Custom auth domain | `auth.sanasol.ws` |
| `HYTALE_NO_LIBZSTD_FIX` | Disable libzstd replacement | `1` |