Hi Ramon,
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Try adding noaudio to the vc4-hdmi (not sure this is the correct name) line in the config.txt file in /boot.? I had to do that for an external HDMI monitor with audio.
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I still need to shut down and wait to restart my DE.??
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I also suggest going to JJ's 64-bit software.? My DE seems to like it better.
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73
Evan
AC9TU