Operate controlleur now does'nt mork

hello
*excuse me for my english
I try to control the mix table of ardour from my midi keybord.
I have enabeled generic midi, respond to MMC command and send MMC commande is OK then I click ctrl and the two buttons of the mouse or ctrl and middle button , “operate controlleur now” appear, I move the controlleur and nothing
Thank you for your help

François

Have you connected the MIDI keyboard’s MIDI port to Ardour’s MIDI Control Input? – Either in the “generic MIDI” settings, or via Menu > Window > MIDI Connection Manager?

If you have don that, for Ardour5, you might also have to disable: Preferences > MIDI Ports > Follow Selection

When that option is enabled, the MIDI-keybord’s ports may be dis/re-connected when a track is selected. This may effectively make it unusable for control.

I am on Ubuntu 18 04 and i use ardour 5 ,i use jack for connexions and there is no possibilités To connect midi net keyboard To autour midi control .i trie to desable what you say

Thank you

with this magic code in the unbuntu terminal it works perfectly
ThinkPad-T400:~$ a2j -e