touchpad – Mouse not working on Acer Aspire 5-43 under Ubuntu 21.04

I’m taking a look at this laptop for a friend. She installed Ubuntu 21.04 over the Windows installation and everything seems to be working with one exception. The mouse, whether touchpad or external, doesn’t move the pointer. It stays stuck in the lower left corner.

I’ve tried installing xserver-xorg-input-synaptics, I can’t find anything in the BIOS that seems to apply to the touchpad. I’m pretty much at my wits end with this. Any help would be appreciated.