Black screen when greeter/ddlm is launched

[yifu]

I installed arch linux on as a virtual box instance.
I've configured greeter/ddlm. I added the greeter user into the video group.
And when I reboot, I get a black screen. I managed to get the error message.
Here is, roughly, the error message I get:

thread 'main' panicked at 'unable to draw background: Custom { kind: Other, error: "cannot create subdimensions larger than buffer: (0, 320, 1024, 128) > (0, 0, 1024, 768)" }', src/[main.rs:328](http://main.rs:328/):10

[deathowl]

It seems like your frame buffer is smaller than 1027x768

[deathowl]

please check by running fbset -i