Ok, after some new attempts I can file a report of what's going on. I tried again with a live session on a daily ubuntu image. By issuing manually inside a shell the command
sudo apt-get install bcmwl-kernel-source the wireless network is immediately recognised. So I decided to try this same command on my installed 14.04.1 system with the 3.16.0-25 kernel, but the package is already installed, and won't istall again. Then I tried this: sudo apt-get --reinstall install bcmwl-kernel-source after this the wireless network does NOT work. Instead, the command also broke my working network with 3.13.0-40 kernel!!! Besides, the command sudo modprobe wl gives: "no such module" In an attempt to fix my wireless network within the 3.13 kernel I reinstalled the bcmwl package again. The command was issued under the old kernel this time, and this is the result: Loading new bcmwl-6.30.223.141+bdcom DKMS files... Building for 3.13.0-40-generic and 3.16.0-25-generic Building for architecture x86_64 Building initial module for 3.13.0-40-generic Done. wl: Running module version sanity check. - Original module - No original module exists within this kernel - Installation - Installing to /lib/modules/3.13.0-40-generic/updates/dkms/ depmod...... DKMS: install completed. Building initial module for 3.16.0-25-generic Error! Bad return status for module build on kernel: 3.16.0-25-generic (x86_64) Consult /var/lib/dkms/bcmwl/6.30.223.141+bdcom/build/make.log for more information. update-initramfs: deferring update (trigger activated) Elaborazione dei trigger per initramfs-tools (0.103ubuntu4.2)... I would stress the attention on this part: "........Error! Bad return status for module build on kernel:...." The wireless network works again under 3.13, but apparently, for some reason, the module is NOT built for the new kernel. So it seems that some compilation error is present. I attached the make.log file. ** Attachment added: "make.log" https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1397383/+attachment/4273614/+files/make.log -- 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/1397383 Title: 14e4:4359 [Dell Latitude 5530] Broadcom BCM43228 WiFi interface not recognized with linux-generic-lts-utopic 3.16.0-25 Status in bcmwl package in Ubuntu: Incomplete Bug description: I have a Dell latitude 5530 laptop with the Broadcom BCM43228 wireless card, and I currently run Kubuntu 14.04.1 LTS. It works ok with the 3.13.0-40 original linux kernel, but after installing the linux-generic-lts-utopic kernel (version 3.16-25) the wireless interface does not appear any more. The kubuntu applet for network connections does not allow to switch the wireless network on. Booting back with 3.13 kernel can fix the issue, so it's not a hardware problem. The following commands do not give any output concerning the wireless interface wlan0 or the BCM43228: dmesg | grep 'BCM' iwconfig ifconfig ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-generic-lts-utopic 3.16.0.25.19 ProcVersionSignature: Ubuntu 3.13.0-40.69-generic 3.13.11.10 Uname: Linux 3.13.0-40-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.5 Architecture: amd64 CurrentDesktop: KDE Date: Fri Nov 28 17:35:37 2014 InstallationDate: Installed on 2013-04-25 (581 days ago) InstallationMedia: Kubuntu 13.04 "Raring Ringtail" - Release amd64 (20130423.1) SourcePackage: linux-meta-lts-utopic UpgradeStatus: Upgraded to trusty on 2014-04-18 (224 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1397383/+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