Lucky you, you’ve got the second quadrant. I cannot locate one anywhere (other than overpriced) and even Thrustmaster doesn’t have it listed in their shop as a separate item, however their website does.
Anyhow, I cannot test the Dreamliner, because I only have the Standard Edition of Flight Simulator.
However, as I understand it, the 747 and 787 are supposed to have identical autopilot control schemes.
Is the issue you are having also occurring on the 747? I use it on the 747 without issue.
In either case, these are the assigned controls to the three-way knob:
• IAS/MACH: Instruments and Systems—>Flight Instruments—>Select Airspeed Bug
• HDG/TRK: Instruments and Systems—>Flight Instruments—>Select Heading Bug
• ALTITUDE: Instruments and Systems—>Flight Instruments—>Select Altitude Bug
And the assigned setting to clockwise/anti-clockwise on the SEL knob:
• Clockwise: Miscellaneous—>Plus
• Anti-clockwise: Miscellaneous—>Minus
If that is how yours are set and there is only an issue with the 787, then perhaps it is with the aircraft’s model itself.
However, if you do find the control mapping is not right, you should be able to check and/or reassign the buttons and knobs as you wish.
There is a trick to programming the three-way selector knob, however, when assigning it a key map.
The trick is:
• Preset the three-way knob to a neighboring setting
• Click “Start Scanning”
• Turn the three-way knob to the setting you want
• Turn the three-way knob away from the setting
• Click validate
For example, you want to assign a control to IAS/MACH. Point it to HDG/TRK first. In Control Options, locate the desired control you wish to map it to. Click “Start Scannng”, point it to IAS/MACH then point it back to HDG/TRK, click validate. That will set it.