> Qualcomm showed Linux working in October 2023 yet here in October 2024 Linux does not work. I don't get it.

Curse of Android, Qualcomm lived for so long with permanently forked kernel, that there is no pressure on code quality, only thing they know is how to sling minimally viable platform code at their unfortunate customers. No one cares about maintainability of it, because even before code has a chance to stabilise, there is already new model to be released, new hardware to be supported. At this point no one cares about old hardware.

I'm sure Linux still works, more or less, on Qualcomm's reference design laptop. But that one isn't available to customers, and they failed to enable usable Linux support on their platform as a whole.