I saw Possible reasons (other than Open Firmware Password Protection) for not being able to boot into single user mode?, but it didn't help any, since I'm using the laptop's keyboard.

Yes, my Mac can boot into other modes, like Recovery and Apple's Boot Manager, but it fails to boot into Single User.

Also, the command key works, so can anyone help with this?

Edit: I do not have FileVault enabled.

I saw Possible reasons (other than Open Firmware Password Protection) for not being able to boot into single user mode?, but it didn't help any, since I'm using the laptop's keyboard.

Yes, my Mac can boot into other modes, like Recovery and Apple's Boot Manager, but it fails to boot into Single User.

Also, the command key works, so can anyone help with this?

Edit: I do not have FileVault enabled.