There’s no real difference between different brands of laptops that matters to distributions. In most cases there’s not even a difference between desktops and laptops that matters to distribution choice.

ThinkPads have always been well supported by Linux and older laptops are even better for support as there’s no issue of hardware newer than drivers.

https://matrix.org/category/dma/

There is work in progress to address this compelled by EU legislation.

Thanks for the advice, I installed the Debian package “read-edid” and used the get-edid program from it to get the EDID from the monitor. Then I installed the “wxedid” package to display it graphically because the parse-edid program from read-edid didn’t work well. According to wxedid there’s a seletion of 38402160 modes and some 40962160 modes. So it seems that the EDID is the problem.