I have a co-worker who purchased a Lenovo Carbon X1 laptop (7th generation). It's a nice, light machine; great potential for a laptop if all of the gremlins can be sorted when running Linux.
- keyboard backlight does not work
- speakers do not work
- microphone does not work
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Ubuntu 20.04 seems to have fixed the mic and speakers; probably various fixes have made it into the updated kernel versions.