no video when loading game

[B-Nerd]

when i change the setting DSPEmulation = "null" to DSPEmulation = "lle"
i get a black screen with no video
i tried it on the qt & sdl version both the same FYI i use the appimage
here is the config.toml file content github does not like toml

[Audio]
DSPEmulation = "lle"
EnableAudio = true

[Battery]
BatteryPercentage = 3
ChargerPlugged = true

[GPU]
EnableShaderJIT = true
EnableVSync = true
Renderer = "opengl"

[General]
EnableDiscordRPC = false
UsePortableBuild = false

[SD]
UseVirtualSD = true
WriteProtectVirtualSD = false