default or selected kernelversion does not have config value CONFIG_FB_MBX_DEBUG.
Result is shown for kernelversion 6.9.9
Enable debugging info via debugfs
configname: CONFIG_FB_MBX_DEBUG
Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Frame buffer Devices
└─>Enable debugging info via debugfs
In linux kernel since version 2.6.20 (release Date: 2007-02-04)
Enable this if you want debugging information using the debug
filesystem (debugfs)
If unsure, say N.
filesystem (debugfs)
If unsure, say N.