Updated: solved thanks to the info at this message
I've been messing around with this laptop (Thinkpad E495) and FreeBSD since last year. While using the 13.0-CURRENT version until march, I was able to change the screen brightness via:
$ doas sysctl...
I'm currently running FreeBSD 12.0-RELEASE-p12 with XFCE and it is slow: top reports Xorg using 90+% of CPU resources on idle state.
67062 tom 1 101 0 320M 243M CPU1 1 40.0H 93.12% Xorg
Can someone help me troubleshoot? It is a DELL Latitude E7470 on which I...