NEC C751Q Setup Manual page 61

Confirm the
•
cmdline.txt
"
console=ttyAMA0,
• Confirm no other software is currently accessing the serial port.
Problem: The Compute Module continually restarts
Solution:
• Confirm the OSD COMPUTE MODULE setting for WDT (Watchdog Timer) is set to DISABLE or, if
set to ENABLE, that any watchdog timer function installed is correctly configured to reset the
timer in the display within the TIME PERIOD set on the OSD.
Problem: Flashing the Compute Module fails after a couple of minutes.
Solution:
• Confirm the OSD COMPUTE MODULE setting for WDT (Watchdog Timer) is set to DISABLE.
Problem: Video playback is slow or jerky
Solutions:
The default of 64 MB for video may not be enough for full-screen video. Try allocating at least
•
128 MB system memory as video memory. 192 MB is recommended if for full-screen playback
of 1920x1080 video files.
o Using the Raspberry Pi Config Utility from a terminal window:

o By editing the config.txt file:


©2018 NEC Display Solutions, Ltd.
file doesn't contain any sections with "
.......".
sudo raspi-config
Select: 7 Advanced Options
Select: A3 Memory Split
Change to at least 128
Save and restart the system.
Modify or add this line if it doesn't already exist:
gpu_mem=128
Save and restart the system.
....." or
console=serial0
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