Originally Posted by yvr76

As CC mentions this is definitely widespread, and at first I thought it was limited to just the initial batch of 788s but you might get lucky on any aircraft!

This was posted in another thread, but the first thing to do is try to reset the seat:

• Go the home screen "Your Seat".
• Hold the top left hand corner "Air Canada" (with AC logo) for 3 seconds.
• Dial pad shows up - hit 3-2-1.

Not all SDs will know how to do this.

Also, if the seat doesn't reset properly don't write in, ask for a comp. form on the flight. I suspect AC is in contact with the manufacturer on this as the compensation amounts are not trivial for them.