Among a number of broken features seems to be the xfce4-sensors-plugin. In Stretch I was able to use the xfce4-sensors-plugin by building a kernel with CONFIG_SENSORS_W83627EHF=y. Somehow this exposed a sensor W83667HG-290 (no, this isn't explicitly enabled in the kernel .config) which appeared as a choice in the xfce4-sensors-plugin dropdown menu. Building kernel 4.19.9 does not produce this behavior (yes, I verified that the .config contains CONFIG_SENSORS_W83627EHF=y). Before I file a debian bug report I wanted to check if anyone here found a solution. Thanks.
Yes, the plugin is definitely broken. sensors-detect shows:
Driver `w83627ehf' (built-in):
* ISA bus, address 0x290
Chip `Winbond W83667HG Super IO Sensors' (confidence: 9)
It's also buit-in to the Stretch kernel and there it works flawlessly. Maybe an older (non-Buster) version of the plugin would work?
PROBLEM SOLVED:
http://pavelshub.com/blog/2010/12/fatal-error-inserting-w83627ehfI actually used this info during the Stretch set up, but forgot about it. Duh.