I guess you mean Tv? the manual aperture ring controls the aperture, and is not registered by the camera sensor.
Truelly, you can shoot in manual or shutter speed only.
Thru the viewfinder, does the brightness changes, as you turn the aperture ring in the lens?
I think you have that backwards. You shoot in AV.
IE: You adjust the aperture (on lens) and the camera's meter chooses the shutter speed. Or you can shoot in manual. I'm going to assume you can NOT shoot in TV (never tried). In TV- you choose the shutter, & the camera chooses the aperture. Since the aperture is manual on the lens itself, there is no way for the camera to choose the aperture for you.