To make this work fully I had to execute "kcmshell thinkpad", activate "Run Thinkpad Buttons KMilo plugin" and deactivate "Change volume in software". Then I had to go to System Settings, Advanced, Service Manager, select "KMilo", stop the service, then restart it.
After that when changing volume, brightness or toggling the ThinkLight the proper OSD should appear.
The following I also posted in bug #76091.
To make this work fully I had to execute "kcmshell thinkpad", activate "Run Thinkpad Buttons KMilo plugin" and deactivate "Change volume in software". Then I had to go to System Settings, Advanced, Service Manager, select "KMilo", stop the service, then restart it.
After that when changing volume, brightness or toggling the ThinkLight the proper OSD should appear.