This uses fbink instead of pngshow to display scanline and image. (No fancy debugging yet - sorry.)
You have to re-detect scanline for this version. Remove old scanline value from screensaver.cfg, then let the device drop into standby, and from standby into poweroff. (Wait some time between those steps. Scanline detection takes a few seconds, and if you just rebooted, some seconds before the mod is even active.)
My H2O is using 4.8.11073 firmware, and detected these scanlines:
Code:
#
# Standby scanline autodetected Sat Oct 27 18:18:56 CEST 2018
# If this value does not work, remove it so it will be re-detected.
#
standby=1231: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
#
# Poweroff scanline autodetected [1] Sat Oct 27 18:19:17 CEST 2018
# If this value does not work, remove it so it will be re-detected.
#
poweroff=1231: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