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fix: support kmsprint for display detection #3623

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fix: support kmsprint for display detection #3623

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bbd513e
fix: support kmsprint for display detection
Patrick-Remy Jul 2, 2026
cb54993
style: fix indentation
Patrick-Remy Jul 2, 2026
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30 changes: 19 additions & 11 deletions runs/atreboot.sh
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Original file line number Diff line number Diff line change
Expand Up @@ -239,20 +239,28 @@ chmod 666 "$LOGFILE"
"$OPENWBBASEDIR/runs/cleanPythonCache.sh"

# detect connected displays
# set default to "true" as fallback if "tvservice" is missing
# set default to "true" as fallback if no cli tools are available
displayDetected="true"
if which tvservice >/dev/null; then
displayDetectionOutput=""
# Modern versions of Raspberry Pi OS use the KMS/DRM graphics stack
# and tvservice will just print 'tvservice is not supported when using the vc4-kms-v3d driver.'
if which kmsprint >/dev/null; then
echo "detected 'kmsprint', query for connected displays"
displayDetectionOutput=$(kmsprint)
elif which tvservice >/dev/null; then
echo "detected 'tvservice', query for connected displays"
output=$(tvservice -l)
echo "$output"
if [[ ! $output =~ "HDMI" ]] && [[ ! $output =~ "LCD" ]]; then
echo "no display detected"
displayDetected="false"
else
echo "detected HDMI or LCD display(s)"
fi
displayDetectionOutput=$(tvservice -l)
else
echo "'kmsprint' and 'tvservice' not found, assuming a display is present"
fi
if [ ! -z "$displayDetectionOutput" ]; then
echo "$displayDetectionOutput"
fi
if [[ ! "$displayDetectionOutput" =~ "HDMI" ]] && [[ ! "$displayDetectionOutput" =~ "LCD" ]]; then
echo "no display detected"
displayDetected="false"
else
echo "'tvservice' not found, assuming a display is present"
echo "detected HDMI or LCD display(s)"
fi
echo "displayDetected: $displayDetected"
forceDisplaySetup=0
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