I changed my mind after a trip away. When trying to use bcmwl_6.20.155 under the generic kernel, the system was very unreliable and often just froze.
I noticed the 6.30.223.30 link you gave me was for the amd46 deb, so I found bcmwl-kernel-source_6.30.223.30+bdcom-0ubuntu3_i386.deb and installed that version (despite the worrying warning it would replace 6.20.155). I was very disappointed to see the install failed with "the usual" GPL-incompatible symbol __rcu_read_unblock. I rebooted to the generic kernel (not really necessary) and dkms status showed the new module had been added already. I ran a dkms install against only the generic kernel and that worked fine. After rebooting, the wifi is working, although I haven't been using it long enough to comment on its stability. I feel this is progress. Even though I haven't moved forward, I've learnt a lot and am now running the latest source. I think I will try making an 0010 patch file for the low latecy changes. -- 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/1156138 Title: bcmwl-kernel-source fails to build on lowlatency kernel [FATAL: modpost: GPL-incompatible module wl.ko uses GPL-only symbol '__rcu_read_unlock'] Status in “bcmwl” package in Ubuntu: Confirmed Bug description: Ubuntu 13.04 ProblemType: Package DistroRelease: Ubuntu 13.04 Package: bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6 ProcVersionSignature: Ubuntu 3.8.0-13.22-generic 3.8.3 Uname: Linux 3.8.0-13-generic i686 NonfreeKernelModules: wl ApportVersion: 2.9.1-0ubuntu1 Architecture: i386 DKMSKernelVersion: 3.8.0-12-lowlatency Date: Sat Mar 16 23:37:03 2013 InstallationDate: Installed on 2013-01-03 (72 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2) MarkForUpload: True PackageVersion: 6.20.155.1+bdcom-0ubuntu6 SourcePackage: bcmwl Title: bcmwl-kernel-source 6.20.155.1+bdcom-0ubuntu6: bcmwl kernel module failed to build UpgradeStatus: Upgraded to raring on 2013-03-12 (4 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1156138/+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