I recently installed ubuntu 25.10 on a legion 5 and whenever I try to restart or shutdown the system it hangs on the ubuntu and legion logo, forcing me to hold down the power button to shut down. I’ve seen a similar post saying they updated their nvidia drivers and that fixed the problem but that didn’t work for me.
implementing version-locking to prevent unintended/unwanted updates.
Beyond that, providing the report from the following will give the necessary hardware and system details to ensure recommendations are appropriate to your circumstances:
Relating to the nvidia drivers, when I initially installed ubuntu it had the option to select the drivers under additional drivers for my gpu but this is now blank and it says no proprietary drivers are in use. I also installed the nvidia settings and I only have the option to apply profiles and nvidia-settings configuration, if this is relevant.