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Hello, this is a post about installing wifi on a debian 9.1
with xfce on a HP laptop This debian was installed on a sd card, so that we do not alter
the main hard drive. The wifi chipset is broadcom bcm43142 , (info obtained with
"lspci"). https://wiki.debian.org/wl
is the reference page. This bcm43142 is not free, and the driver module is not
included in the default debian kernel. https://packages.debian.org/broadcom-sta-dkms
is the link to the module page package. One downloads the driver
corresponding to the actual debian distribution. Then install (in a shell as root) : dpkg -i nameofthepackage.deb (some other packages like the
kernel headers have to be present on the system, see the wiki if
necessary. ) I compiles well. Then modprobe -r all the b43, ... (as adviced in the wiki page) , and "modprobe wl" (always as root). From now on it is not necessary to stay as root. Open a new
shell (or ctrl-D), check that the module was correctly loaded : lsmod | grep wl wl 6443008 0 check that the wifi interface exists : enter in a shell "/sbin/iwconfig" , one should see a "wlo1" interface. (not necessarily as root). If one cannot see any wifi in the network graphical tool, then
in the special case of xfce wm, there is no automatisation of te
process Enjoy !
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