Lenovo have been offering unix at a lower cost than windows for some time. Their experience has been lower returns, fewer customer support calls, cost savings about $100 per unit. Also Linux runs happily with 4 gigs of memory, windows needs 8 for reasonable performance.
So yes Trainz is a...
Take a look at kuid2:86627:100077:3, basically the content creator normally does this and if its just a warning ignore it. The lm.txt file references the .im file, if you using LOD more than one file goes in the lm.txt file.
Cheerio John
Missed that version of the laptop, you could try windows task manager, bottom bar right click, second icon down performance, the GPU should show what it is.
Cheerio John
Integrated graphics 3d score around 2,700 https://www.videocardbenchmark.net/gpu_list.php normally 10,000 is considered reasonable for Trainz and these days most desktop users run with a score of 15,000 or more. Soset the performance sliders back down. Middleton for laptops...
Have a dig in the forum, https://forums.auran.com/threads/more-characters-from-the-1920s.183345/post-2078045 for example. I think these were made with a tool then brought into Blender so ask how it was done or the answer might even be in the forum.
Cheerio John
Level of Detail, in theory things look the same but use a lower detailed mesh in the distance. For lower end machines it means you get the same visual performance with better frame rates. Somewhere in the forum there is a quote, "it runs on my machine so why should I bother with poly counts...