" lspci -vv" gives:
05:00.0 Network controller: Broadcom Corporation BCM4352 802.11ac Wireless
Network Adapter (rev 03)
Subsystem: ASUSTeK Computer Inc. Device 855c
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 16
Region 0: Memory at dfa00000 (64-bit, non-prefetchable) [size=32K]
Region 2: Memory at df800000 (64-bit, non-prefetchable) [size=2M]
Capabilities: [48] 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-
Capabilities: [58] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [68] Vendor Specific Information: Len=44 <?>
Capabilities: [ac] Express (v2) Endpoint, MSI 00
DevCap: MaxPayload 256 bytes, PhantFunc 0, Latency L0s <4us, L1
unlimited
ExtTag- AttnBtn- AttnInd- PwrInd- RBE+ FLReset-
DevCtl: Report errors: Correctable- Non-Fatal- Fatal-
Unsupported-
RlxdOrd- ExtTag- PhantFunc- AuxPwr+ NoSnoop+
MaxPayload 128 bytes, MaxReadReq 1024 bytes
DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+
TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit
Latency L0s <2us, L1 <32us
ClockPM+ Surprise- LLActRep- BwNot-
LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+
DLActive- BWMgmt- ABWMgmt-
DevCap2: Completion Timeout: Range ABCD, TimeoutDis+, LTR+,
OBFF Via WAKE#
DevCtl2: Completion Timeout: 50us to 50ms, TimeoutDis-, LTR+,
OBFF Disabled
LnkCtl2: Target Link Speed: 2.5GT/s, EnterCompliance- SpeedDis-
Transmit Margin: Normal Operating Range,
EnterModifiedCompliance- ComplianceSOS-
Compliance De-emphasis: -6dB
LnkSta2: Current De-emphasis Level: -3.5dB,
EqualizationComplete-, EqualizationPhase1-
EqualizationPhase2-, EqualizationPhase3-,
LinkEqualizationRequest-
Capabilities: [100 v1] Advanced Error Reporting
UESta: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UEMsk: DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt-
RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
UESvrt: DLP+ SDES+ TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt-
RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
CESta: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
CEMsk: RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr+
AERCap: First Error Pointer: 00, GenCap+ CGenEn- ChkCap+ ChkEn-
Capabilities: [13c v1] Device Serial Number 6c-71-00-ff-ff-00-00-01
Capabilities: [150 v1] Power Budgeting <?>
Capabilities: [160 v1] Virtual Channel
Caps: LPEVC=0 RefClk=100ns PATEntryBits=1
Arb: Fixed- WRR32- WRR64- WRR128-
Ctrl: ArbSelect=Fixed
Status: InProgress-
VC0: Caps: PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
Arb: Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
Ctrl: Enable+ ID=0 ArbSelect=Fixed TC/VC=01
Status: NegoPending- InProgress-
Capabilities: [1b0 v1] Latency Tolerance Reporting
Max snoop latency: 71680ns
Max no snoop latency: 71680ns
Capabilities: [220 v1] #15
Kernel driver in use: wl
"dpgk -l | grep wl" gives:
ii bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu2 amd64
Broadcom 802.11 Linux STA wireless driver source
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https://bugs.launchpad.net/bugs/1454717
Title:
Weak wifi signal and frequency disconnects
Status in bcmwl package in Ubuntu:
Confirmed
Bug description:
This bug duplicate
https://bugs.launchpad.net/ubuntu/+source/bcmwl/+bug/1379524 but it
marked expired.
Symptoms same - on my notebook HP Pavilion p170nr with BCM43142 chip
has very low and unstable wi-fi signal. I even can't work from far
room because of permanent disconnects and very low speed. Windows 8 in
same place work fine also all phones.
Also connection frequency disappear. Disconnects don't depend on
signal level. Connection may break even near router and hi (relative)
signal. I changed router but this didn't help.
I don't know if it help, but I get this message in dmesg log
[29218.308151] ------------[ cut here ]------------
[29218.308177] WARNING: CPU: 2 PID: 524 at
/build/buildd/linux-3.19.0/net/wireless/sme.c:800 cfg80211_roamed+0x91/0xa0
[cfg80211]()
[29218.308179] Modules linked in: rfcomm bnep binfmt_misc bbswitch(OE)
nls_iso8859_1 intel_rapl iosf_mbi hp_wmi sparse_keymap x86_pkg_temp_thermal
intel_powerclamp snd_hda_codec_realtek snd_hda_codec_hdmi snd_hda_codec_generic
wl(POE) snd_hda_intel snd_hda_controller coretemp kvm_intel snd_hda_codec
snd_hwdep btusb kvm snd_pcm uvcvideo crct10dif_pclmul snd_seq_midi
snd_seq_midi_event bluetooth snd_rawmidi crc32_pclmul videobuf2_vmalloc snd_seq
videobuf2_memops videobuf2_core ghash_clmulni_intel v4l2_common aesni_intel
videodev media aes_x86_64 lrw gf128mul glue_helper snd_seq_device ablk_helper
snd_timer dm_multipath cryptd scsi_dh i915 snd cfg80211 soundcore hp_accel
joydev serio_raw lis3lv02d input_polldev shpchp drm_kms_helper hp_wireless
mei_me wmi drm video i2c_algo_bit mei intel_smartconnect lpc_ich
[29218.308208] mac_hid ip6t_REJECT nf_reject_ipv6 nf_log_ipv6 xt_hl ip6t_rt
nf_conntrack_ipv6 nf_defrag_ipv6 ipt_REJECT nf_reject_ipv4 nf_log_ipv4
nf_log_common xt_LOG xt_limit xt_tcpudp xt_addrtype nf_conntrack_ipv4
nf_defrag_ipv4 xt_conntrack ip6table_filter ip6_tables nf_conntrack_netbios_ns
nf_conntrack_broadcast nf_nat_ftp nf_nat nf_conntrack_ftp nf_conntrack
iptable_filter parport_pc ppdev ip_tables x_tables lp parport autofs4
hid_generic usbhid hid psmouse ahci r8169 libahci mii
[29218.308231] CPU: 2 PID: 524 Comm: wl_event_handle Tainted: P W OE
3.19.0-16-generic #16-Ubuntu
[29218.308232] Hardware name: Hewlett-Packard HP Pavilion 15 Notebook PC
/2281, BIOS F.12 08/18/2014
[29218.308233] ffffffffc0478a78 ffff8801d55c3da8 ffffffff817c2235
0000000000000007
[29218.308236] 0000000000000000 ffff8801d55c3de8 ffffffff8107595a
ffff8801d23c9078
[29218.308238] ffff8801d26bb000 ffff8801d4a52b40 000000000000009f
ffff8801c5b74b40
[29218.308240] Call Trace:
[29218.308246] [<ffffffff817c2235>] dump_stack+0x45/0x57
[29218.308250] [<ffffffff8107595a>] warn_slowpath_common+0x8a/0xc0
[29218.308252] [<ffffffff81075a4a>] warn_slowpath_null+0x1a/0x20
[29218.308260] [<ffffffffc0454a81>] cfg80211_roamed+0x91/0xa0 [cfg80211]
[29218.308290] [<ffffffffc0a0b9fb>] wl_notify_roaming_status+0xcb/0x150 [wl]
[29218.308312] [<ffffffffc0a0875a>] wl_event_handler+0x6a/0x230 [wl]
[29218.308333] [<ffffffffc0a086f0>] ? wl_free_wdev.isra.23+0x80/0x80 [wl]
[29218.308336] [<ffffffff81094759>] kthread+0xc9/0xe0
[29218.308339] [<ffffffff81094690>] ? kthread_create_on_node+0x1c0/0x1c0
[29218.308342] [<ffffffff817c9298>] ret_from_fork+0x58/0x90
[29218.308344] [<ffffffff81094690>] ? kthread_create_on_node+0x1c0/0x1c0
[29218.308346] ---[ end trace 0970ead2c419c952 ]---
[29222.548357] cfg80211: Calling CRDA to update world regulatory domain
[29222.575949] cfg80211: World regulatory domain updated:
[29222.575952] cfg80211: DFS Master region: unset
[29222.575953] cfg80211: (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp), (dfs_cac_time)
[29222.575956] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
[29222.575958] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
[29222.575959] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi,
2000 mBm), (N/A)
[29222.575961] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
[29222.575962] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
[29228.744616] cfg80211: Calling CRDA to update world regulatory domain
[29228.753685] cfg80211: World regulatory domain updated:
[29228.753696] cfg80211: DFS Master region: unset
[29228.753701] cfg80211: (start_freq - end_freq @ bandwidth),
(max_antenna_gain, max_eirp), (dfs_cac_time)
[29228.753711] cfg80211: (2402000 KHz - 2472000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
[29228.753718] cfg80211: (2457000 KHz - 2482000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
[29228.753725] cfg80211: (2474000 KHz - 2494000 KHz @ 20000 KHz), (300 mBi,
2000 mBm), (N/A)
[29228.753731] cfg80211: (5170000 KHz - 5250000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
[29228.753735] cfg80211: (5735000 KHz - 5835000 KHz @ 40000 KHz), (300 mBi,
2000 mBm), (N/A)
ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: bcmwl-kernel-source 6.30.223.248+bdcom-0ubuntu2
ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
Uname: Linux 3.19.0-16-generic x86_64
NonfreeKernelModules: wl
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
CurrentDesktop: Unity
Date: Wed May 13 16:50:24 2015
InstallationDate: Installed on 2014-11-23 (171 days ago)
InstallationMedia:
SourcePackage: bcmwl
UpgradeStatus: No upgrade log present (probably fresh install)
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