Dear Broadcom,
I've been experiencing intermittent connectivity issues with your
BCM4331 hardware [1] on the current 6.30.223.248 (r487574) driver
for
linux. I have observed the issue on a number of stable kernels all
the way up to 3.19.3 mainline.
When the issue occurs, wireless connectivity is lost and cannot be
reestablished. Bringing the interface down and up, or soft-blocking
and unblocking it do not allow reconnection; only a reboot solves
this. During that time my system shows 200-500ms delays (eg moving
the desktop cursor); the latency is shown in powertop [2].
The issue has occurred across all 2.4GHz and 5GHz, WPA2, WEP,
preshared key and IEEE 802.1X connection parameters; it occurs once
every few days of use, but is of significant impact due to forcing
reboot.
What information will help you reproduce it in your lab? I tried the
open-source drivers available for this hardware, but they are
feature-incomplete, so I have to solicit your help here.
Many thanks,
Daniel
-- [1]
04:00.0 Network controller: Broadcom Corporation BCM4331
802.11a/b/g/n (rev 02)
Subsystem: Apple Inc. AirPort Extreme
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: 256 bytes
Interrupt: pin A routed to IRQ 17
Region 0: Memory at c1900000 (64-bit, non-prefetchable) [size=16K]
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-
Capabilities: [58] Vendor Specific Information: Len=78 <?>
Capabilities: [48] MSI: Enable- Count=1/1 Maskable- 64bit+
Address: 0000000000000000 Data: 0000
Capabilities: [d0] Express (v1) Endpoint, MSI 00
DevCap: MaxPayload 128 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 512 bytes
DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr+
TransPend-
LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit
Latency
L0s <4us, L1 <64us
ClockPM+ Surprise- LLActRep+ BwNot-
LnkCtl: ASPM L0s L1 Enabled; RCB 64 bytes Disabled- CommClk+
ExtSynch- ClockPM+ AutWidDis- BWInt- AutBWInt-
LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive+
BWMgmt- ABWMgmt-
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: 14, GenCap+ CGenEn- ChkCap+ ChkEn-
Capabilities: [13c 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=ff
Status: NegoPending- InProgress-
Capabilities: [160 v1] Device Serial Number 73-cd-b1-ff-ff-13-b8-f6
Capabilities: [16c v1] Power Budgeting <?>
Kernel driver in use: wl
-- [2]
$ sudo powertop
Summary: 176.3 wakeups/second, 11.5 GPU ops/seconds, 0.0 VFS
ops/sec
and 128.8% CPU use
Usage Events/s Category Description
810.5 ms/s 0.00 Timer wl_timer
428.5 ms/s 0.00 Interrupt [1]
timer(softirq)
1.6 ms/s 42.6 Process
/usr/bin/gnome-shell
3.3 ms/s 20.4 Process gnome-terminal
92.4 µs/s 20.0 Process [rcu_sched]
243.3 µs/s 18.7 Timer
tick_sched_timer
...
--
Daniel J Blueman
Principal Software Engineer, Numascale
