This issue happened to me yesterday and I could not find a solution, no matter what I tried, so I started thinking back, and the issue seemed to be me a couple days before messing with the laptop's MUX switch.
I enabled the integrated graphics mode, and when I changed it back to what I used to use every day, LS started having this issue.
I finally ended up finding the problem, inside Windows Settings > System > Screens > Advanced Graphics, LosslessScaling was automatically changed to "Low power mode" which meant it was forcefully using the integrated graphics, the moment I changed that and I restarted the program, it started working again.
This post is just so that if anybody has the same issue and can't find a solution, maybe this can help.
TLDR: Set "LosslessScaling.exe" to "High Performance" inside windows advanced graphic settings.
#Nothing happens when scaling, and LS crashes when I unscale.
jolly folio
keen sluice