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Pimp my Garmin: Turning your Fenix 5 Plus into a D2 Delta pilot watch

A while ago I was fed up with Android Wear smartwatches and bought a Garmin Fenix 5 Plus. After using it for a while I started to explore the possibilities beyond the manufacturer specifications. This lead to a firmware patcher based upon work from Alex Whiter (who sadly passed in 2019). That patcher modified the firmware update file and disabled the license check for Garmin Maps. After installing a patched firmware, you were able to use any downloaded Garmin map on the watch without having to buy a license. Alex himself also offered a patcher to enable the use of custom made JNX "BirdsEye" files. (These JNX files can be easily created with SAS.Planet / SAS.Планета, a Windows tool to download map tiles and export them to different formats.)

These patchers sparked my interest in the firmware format as I've noticed they not only patched the few Bytes in the code but also modified other areas in the file.

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No sound in Flash videos

If you have no sound in Flash videos but in all other programs, there are two possibilities:

  1. the PCM output is set to silence
    • check volume setting with alsamixer
  2. you might have a second audio device (e.g. a Webcam with a microphone) which gets preferred by ALSA
    • fix it by unplugging it, or
    • force ALSA to use another device, see ALSA FAQ#26
    • set SkypeOptionsSound Devices to [ ] Allow Skype to automatically adjust my mixer levels
  3. some sound via PulseAudio is currently playing (see ALSA → PulseAudio for Flash and others)

Bug report is #396558.