Troubleshooting SDM/CHDK Installer — Common Issues and Fixes

Troubleshooting SDM/CHDK Installer — Common Issues and Fixes

1. Installer won’t run (Windows)

• Cause: Missing drivers or blocked by SmartScreen/antivirus.
• Fix: Right-click → Run as administrator; allow through SmartScreen/antivirus; install libusb or Zadig if using USB mode.

2. Camera not detected

• Cause: Wrong USB mode, bad cable, or disabled USB debugging (if applicable).
• Fix: Use the original cable, set camera to PC/USB mode if present, try a different USB port, reboot camera and PC, enable any required USB mass-storage mode.

3. “No supported firmware found” / incompatible model

• Cause: Installer doesn’t recognize your camera or wrong firmware selected.
• Fix: Verify camera model and firmware version; download the correct CHDK build for your exact model; use SDM mode if firmware flashing isn’t supported for your model.

4. SDM (cardless) install fails or camera freezes

• Cause: Incompatible SDM payload or timing issues.
• Fix: Try different CHDK SDM payload files (v1/v2), reduce camera sleep/auto-off, ensure battery is charged, re-run with camera in live view and quick shutter presses as instructed.

5. CHDK won’t start after install (SD card install)

• Cause: Incorrect file placement or missing autoboot files.
• Fix: Ensure CHDK files are on the root of the card, autoboot.bin (or appropriate autoexec scripts) present, and card is formatted FAT32/exFAT if supported; test on a different SD card.

6. Memory card not recognized after install

• Cause: Card corrupted or wrong format.
• Fix: Reformat card in camera (after backing up), use a Class 4–10 card from a reputable brand, avoid SDXC cards unless supported.

7. Script or feature errors in CHDK

• Cause: Outdated CHDK build, missing modules, or incorrect settings.
• Fix: Update to the latest stable build for your camera; enable required modules in CHDK menu; check script compatibility and syntax.

8. Permission/USB access errors on macOS/Linux

• Cause: Missing udev rules (Linux) or driver support (macOS).
• Fix (Linux): Add udev rules for the camera, reload udev, and run installer with appropriate permissions.
• Fix (macOS): Use SD card method or a compatible USB driver; prefer card-based install if driver issues persist.

9. Installer reports checksum or corrupted download

• Cause: Interrupted download or antivirus modified file.
• Fix: Re-download from official source, verify checksum, temporarily disable antivirus during download.

10. Reverting CHDK or removing installer

• Fix: Delete CHDK files from SD card root and remove any autoboot configurations; for SDM, power-cycle camera and remove residual payloads; restore original firmware if you flashed it (follow camera-specific recovery steps).

Quick diagnostic checklist (try in this order)

1. Confirm camera model and firmware.
2. Use original USB cable and try different ports.
3. Try SD card-based install if USB/SDM fails.
4. Reformat SD card in camera and re-copy CHDK files.
5. Update installer and CHDK payload to latest build.
6. Test with another SD card or computer.

If you want, tell me your camera model, firmware version