Other Parts Discussed in Thread: WL1837MOD, WL1835
This post is intended as an additional solution to separate locked thread "Linux/WL1837MOD: [calibrator] nl80211 not found".
Have a Linux based system with AM335x "Beaglebone" architecture and WL1835. Needing to certify wifi with a test house, the "calibrator" tool is needed so followed instructions in https://www.ti.com/lit/ug/swru561a/swru561a.pdf. Needed to build kernel with different method and produced a debian package (build deb-pkg) which was successful after resolving a problem applying wilink patches. After carefully following all the instructions in doc. 561a, was able to successfully run "calibrator" on new system.
But then wanted to build another kernel debian package. Apparently all config options were good, built and installed it, and began to have error message "nl80211 not found". So went back and reinstalled the first kernel package which was known to work. Continued to get "nl80211 not found" after running "calibrator".
The earlier thread was helpful in that it prompted me to again work through the instructions in doc. 561a. This problem was cleared by revisit to 4.1 "Configuring the WiLink8 Target:"
cd /usr/sbin/wlconf
./configure-device.sh
Its not clear to me exactly what file(s) are altered by this config step, and I wouldn't have expected reinstallation of the kernel package to overwrite it, but evidently it does. Two separate systems with similar config/history were cleared by this step.
