I bumped into this issue when I recently installed Debian on my new laptop. I only installed the "Standard system utilities", thus no network-manager and while wpasupplicant was installed the wireless connection config I used during installation wasn't written to a/the wpa_supplicant.conf file and neither was there anything configured/written to /e/n/i related to my wireless card. Due to 'predicable' network naming this becomes even more of a hassle to do manually. > >From the netcfg changelog: > > * On Linux: Write a network-manager configuration file in perference > to ifupdown if network-manager is found in the installed system. > Configure wired networking with ifupdown if not. Do not configure > wireless networking through ifupdown. While the above quote is from 25 Nov 2012 and I haven't checked whether the changelog would now tell sth different, it looks like wireless networking through ifupdown is not configured, regardless whether network-manager is present or not. Why not configure wireless networking through ifupdown when network-manager *isn't* installed? I have to give you kudos for (manually?) copying an .ucode file which I provided through a workaround , but that added to my surprise that wireless networking still wouldn't work due to the above described problem. Cheers, Diederik  https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=808792#47
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