I tried the new 16.04 release ISO and the problem exists for me (DELL XPS 13) also which makes it unusable for me for now. Choosing an older daily build before 20.4 where the 4.4.0-18 kernel is still used works fine.
-- You received this bug notification because you are a member of Kernel Packages, which is subscribed to bcmwl in Ubuntu. https://bugs.launchpad.net/bugs/1572659 Title: bcmwl driver does not work with kernel 4.4.0-21 Status in bcmwl package in Ubuntu: Confirmed Bug description: After updating ubuntu 16.04 to latest kernel 4.4.0-21, bcmwl driver (package bcmwl-kernel-source) does not load and wifi not work. sudo modprobe wl modprobe: ERROR: could not insert 'wl': Required key not available If I boot with kernel 4.4.0-18 - wifi works normally. --- ApportVersion: 2.20.1-0ubuntu2 Architecture: amd64 CurrentDesktop: Unity DistroRelease: Ubuntu 16.04 InstallationDate: Installed on 2015-12-02 (140 days ago) InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021) NonfreeKernelModules: wl Package: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu8 PackageArchitecture: amd64 ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6 Tags: xenial Uname: Linux 4.4.0-18-generic x86_64 UpgradeStatus: Upgraded to xenial on 2016-03-03 (47 days ago) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo _MarkForUpload: True To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1572659/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp