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cec-ctl(1) — Arch manual pages
The easiest way to quickly test a CEC adapter of an HDMI output is: cec-ctl -d/dev/cecX --playback -S. And for an HDMI input: cec-ctl -d/dev/cecX --tv -S. Both commands configure the CEC adapter and show the CEC topology. To put a display to standby use: cec-ctl -d/dev/cecX --to 0 --standby. To wake up the display:
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cec-ctl(1) — Arch manual pages
The cec-ctl tool is used to control cec devices. It is able to control almost any aspect of such devices covering the full CEC API. The easiest way to quickly test a CEC adapter of an HDMI output is: cec-ctl -d/dev/cecX --playback -S And for an HDMI input: cec-ctl -d/dev/cecX --tv -S
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