GPU will not use system ram in Ubuntu

My system is ubuntu 24.04.1. My GPU is 4060Ti and driver version is v560. From the nvidia-smi, the dedicated memory is same as the total memory, with no shared memory which also include system RAM. In Windows, the system ram can be used by GPU.
This is obvious GPU driver issue. And in the forum, many users have reported the problem. Nvidia, stop playing the fool. If you think this is not driver issue, show the solution how your GPU can use system RAM.