"Use Dummy Video" cannot be displayed normally

[lyturn]

I just discovered this aegisub "fork" and couldn't wait to give it a try, but I ran into this problem and was hoping someone could help me solve it. Thanks.

[arch1t3cht]

Do normal videos display normally? Do you have this issue with any other Aegisub version?

[lyturn]

It is not normal to open blank videos and videos. But 3.2.2.8635 is normal.

[arch1t3cht]

Then my best guess is that this is an issue with your graphics drivers, combined with some change in wxWidgets (since to my knowledge nothing substantial changed in Aegisub itself regarding the video display backend) since 3.2.2. It's hard to debug specifics here, but maybe try updating or reinstalling some drivers.

[lyturn]

You guessed it right. I used to use win8.1 system, and the 3.2.2.9262 was normal. Since switching to win10, I have updated the driver. One day I opened 3.2.2.9262 and this problem occurred. This is still the problem.