Dear customer,
Thank you for your answer.
update:
1. When does this cannot shutdown happen? After installed Linux? Or update bios?
Please check ubuntu solution for PC not shutdown.
How to shut down a Linux PC that won’t turn off (addictivetips.com)
Shutdown does not power off computer - Ask Ubuntu
Can you tried to check beta bios F9a to check.
https://drive.google.com/file/d/1OgBhsKnqM-C5q33n7qk7aRIkzzfWk1hC/view?usp=sharing
2. Have you tried to check your s power supply? Maybe isolate power supply issue.
3. If above not help, please send the motherboard for repair.
We have forwarded your answer and will come back to you ASAP after figuring it out clearly.
Thanks for your patience.
Regards
GIGABYTE Team
Io non so se leggono le precedenti conversazioni prima di rispondere. Avevo fatto presente che con linux il pc si spegne con windows no. Il bios F9a me lo hanno inviato loro poi il punto 2 non so cosa vogliono dire e il punto 3 dove dovrei inviarla!!!!!! Non ho parole.......................