Sorry for the long delay - when working on upstream kernel testing with 3.19.0-031900.201502091451 i386/32bit to confirm bug 1422513 I realized that the internal Broadcom chip works fine after uninstalling bcmwl-kernel-source and running with above kernel.
b43 seems to do fine in that case as lsmod indicates: Module Size Used by nfnetlink_queue 17963 0 nfnetlink_log 17665 0 nfnetlink 14324 2 nfnetlink_log,nfnetlink_queue ctr 13025 1 ccm 17562 1 dm_crypt 22836 1 snd_hda_codec_realtek 68841 1 snd_hda_codec_generic 63667 1 snd_hda_codec_realtek snd_hda_intel 29576 3 snd_hda_controller 30930 1 snd_hda_intel snd_hda_codec 121018 4 snd_hda_codec_realtek,snd_hda_codec_generic,snd_hda_intel,snd_hda_controller carl9170 86955 0 snd_hwdep 13276 1 snd_hda_codec uvcvideo 78147 0 ath 24509 1 carl9170 snd_pcm 89214 3 snd_hda_codec,snd_hda_intel,snd_hda_controller videobuf2_vmalloc 13485 1 uvcvideo videobuf2_memops 13170 1 videobuf2_vmalloc videobuf2_core 45571 1 uvcvideo arc4 12509 2 snd_seq_midi 13324 0 snd_seq_midi_event 14475 1 snd_seq_midi v4l2_common 14442 1 videobuf2_core snd_rawmidi 25786 1 snd_seq_midi videodev 140634 3 uvcvideo,v4l2_common,videobuf2_core b43 404250 0 snd_seq 56978 2 snd_seq_midi_event,snd_seq_midi bcma 47124 1 b43 coretemp 13358 0 snd_seq_device 14451 3 snd_seq,snd_rawmidi,snd_seq_midi mac80211 643092 2 b43,carl9170 snd_timer 29036 2 snd_pcm,snd_seq media 21127 2 uvcvideo,videodev joydev 17311 0 serio_raw 13251 0 snd 67102 16 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_pcm,snd_seq,snd_rawmidi,snd_hda_codec_generic,snd_hda_codec,snd_hda_intel,snd_seq_device lpc_ich 17000 0 cfg80211 462008 4 b43,ath,mac80211,carl9170 rfcomm 59314 8 btusb 31907 0 bnep 19107 2 bluetooth 444619 22 bnep,btusb,rfcomm soundcore 14635 2 snd,snd_hda_codec shpchp 32280 0 ideapad_laptop 18132 0 sparse_keymap 13658 1 ideapad_laptop mac_hid 13099 0 parport_pc 32154 0 ppdev 17423 0 lp 13359 0 parport 40945 3 lp,ppdev,parport_pc ums_realtek 18008 0 uas 22257 0 usb_storage 57197 2 uas,ums_realtek i915 956578 3 i2c_algo_bit 13316 1 i915 drm_kms_helper 106489 1 i915 tg3 159805 0 psmouse 106642 0 drm 276577 5 i915,drm_kms_helper ptp 18938 1 tg3 pps_core 18768 1 ptp pata_acpi 12901 0 ssb 56722 1 b43 video 20019 1 i915 wmi 18843 0 ** Tags added: kernel-fixed-upstream -- 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/1385059 Title: 14e4:4315 [lenovo IdeaPad S10e] No WiFi - Broadcom Corporation BCM4312 802.11b/g LP-PHY (rev 01) Status in bcmwl package in Ubuntu: Triaged Bug description: With my Lenovo IdeaPad S10e, after updating to 14.10 from 14.04 the WLAN does not work anymore - the driver seems to be loaded since the hardware light flashes blue/purple, but the device is unable to connect to any WLAN. dmesg shows: [ 1253.135793] ERROR @wl_dev_intvar_get : error (-1) [ 1253.135805] ERROR @wl_cfg80211_get_tx_power : error (-1) 04:00.0 Network controller [0280]: Broadcom Corporation BCM4312 802.11b/g LP-PHY [14e4:4315] (rev 01) Subsystem: Broadcom Corporation Device [14e4:04b5] Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx- Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx- Latency: 0, Cache Line Size: 64 bytes Interrupt: pin A routed to IRQ 18 Region 0: Memory at f0200000 (64-bit, non-prefetchable) [size=16K] Capabilities: <access denied> Kernel driver in use: wl ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-23-generic 3.16.0-23.31 ProcVersionSignature: Ubuntu 3.16.0-23.31-generic 3.16.4 Uname: Linux 3.16.0-23-generic i686 NonfreeKernelModules: wl ApportVersion: 2.14.7-0ubuntu8 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: hirsch 2758 F.... pulseaudio CurrentDesktop: Unity Date: Fri Oct 24 08:13:35 2014 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=cef59770-4af9-4efd-b1a8-f3b9e6fdf30f InstallationDate: Installed on 2013-01-14 (647 days ago) InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release i386 (20121017.2) MachineType: LENOVO 40684KG ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-23-generic root=UUID=57ea19ce-b54f-4b7c-975c-b11064321210 ro quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-23-generic N/A linux-backports-modules-3.16.0-23-generic N/A linux-firmware 1.138 SourcePackage: linux UpgradeStatus: Upgraded to utopic on 2014-10-23 (0 days ago) dmi.bios.date: 10/11/2010 dmi.bios.vendor: LENOVO dmi.bios.version: 14CNA0WW dmi.board.name: Kuril dmi.board.vendor: Lenovo dmi.board.version: Rev 1.0 dmi.chassis.asset.tag: No Asset Tag dmi.chassis.type: 10 dmi.chassis.vendor: Lenovo dmi.chassis.version: Rev 1.0 dmi.modalias: dmi:bvnLENOVO:bvr14CNA0WW:bd10/11/2010:svnLENOVO:pn40684KG:pvrLenovo:rvnLenovo:rnKuril:rvrRev1.0:cvnLenovo:ct10:cvrRev1.0: dmi.product.name: 40684KG dmi.product.version: Lenovo dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1385059/+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