HDMI screen go black suddenly

Dear nvidia team:
We tested an abnormal case on our customer’s board. After the system is established, the screen suddenly went black.But the system is still running OK.Then I have to restart to recover. This is a very serious problem. Is it related to the monitor?I have caught log. Please help me to check.
Below is the log:
Xorg.0.log (7.3 KB)