I have run into this exact same issue in 16.2.6 and 16.2.7 on Ubuntu
Changing MemoryDenyWriteExecute to false allows the OSD to start on rPi 4 ARM64 systems.
Kernel version 5.4.0-1045-raspi Ubuntu 20.04.1 LTS
Just wanted to let you know that those packages have not been patched.
I have run into this exact same issue in 16.2.6 and 16.2.7 on Ubuntu
Changing MemoryDenyWrite Execute to false allows the OSD to start on rPi 4 ARM64 systems.
Kernel version 5.4.0-1045-raspi
Ubuntu 20.04.1 LTS
Just wanted to let you know that those packages have not been patched.