On Manjaro, two of of three available kernels for the Raspberry Pi the mouse cursor is just a white block instead of a pointer when using the kmsdrm backend. Is this a kernel issue or a SDL issue?
core/linux-rpi4 4.19.122-1 is the one where the mouse cursor just works, while core/linux-rpi4-mainline 5.6.10-2 and core/linux-rpi4-next 5.4.40-1 don’t.