Problem solved by build module wl.ko from sources from broadcom site (http://www.broadcom.com/support/802.11/linux_sta.php). I just manually replace old module wl.ko to new.
-- 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/1405074 Title: Low wifi signal level Status in bcmwl package in Ubuntu: New Bug description: My notebook HP Pavilion p170nr has very poor wi-fi receiving. Even near wi-fi router it shows about half of indicator level. On Windows 8.1 everyting work fine. sudo lspci -vvnn | grep -A 9 Network 08:00.0 Network controller [0280]: Broadcom Corporation BCM43142 802.11b/g/n [14e4:4365] (rev 01) Subsystem: Hewlett-Packard Company Device [103c:2230] 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 b5500000 (64-bit, non-prefetchable) [size=32K] Capabilities: [40] Power Management version 3 Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA PME(D0+,D1-,D2-,D3hot+,D3cold+) Status: D0 NoSoftRst+ PME-Enable- DSel=0 DScale=2 PME- lsb_release -rd Description: Ubuntu 14.04.1 LTS Release: 14.04 uname -a Linux black-pavilion 3.13.0-43-generic #72-Ubuntu SMP Mon Dec 8 19:35:06 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux sudo dmidecode -s bios-version F.12 sudo dmidecode -s bios-release-date 08/18/2014 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: bcmwl-kernel-source 6.30.223.141+bdcom-0ubuntu2 ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11 Uname: Linux 3.13.0-43-generic x86_64 NonfreeKernelModules: wl ApportVersion: 2.14.1-0ubuntu3.6 Architecture: amd64 CurrentDesktop: Unity Date: Tue Dec 23 09:53:18 2014 InstallationDate: Installed on 2014-11-23 (29 days ago) InstallationMedia: SourcePackage: bcmwl UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1405074/+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
