[BUG?] b43: Wireless signal lowers when increasing sound

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* [BUG?] b43: Wireless signal lowers when increasing sound
@ 2008-02-18  7:23 Ronald
  2008-02-18  7:25 ` Ronald
  2008-02-18 15:35 ` John W. Linville
  0 siblings, 2 replies; 4+ messages in thread
From: Ronald @ 2008-02-18  7:23 UTC (permalink / raw)
  To: linux-wireless

hey,

I'm currently using the b43 driver for my BCM4311 chipset. The driver 
works extremely well. It is the only option under Linux that supports 
WPA-AES with wpa_supplicant :) (and it's more stable than 
wpa_supplicant). However, I'm seeing some unexpected behaviour with the 
card and another chipset. When I enable my soundcard (setting volume 
from 0 to > 0) the wireless signal seems to drop completely (really 
funny to see my downloadspeeds go up and down :) ). My question is, is 
this normal?

However, I'm not sure if this is related to the b43 driver so don't 
flame me ;)

						TIA, Ronald

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [BUG?] b43: Wireless signal lowers when increasing sound
  2008-02-18  7:23 [BUG?] b43: Wireless signal lowers when increasing sound Ronald
@ 2008-02-18  7:25 ` Ronald
  2008-02-18 15:35 ` John W. Linville
  1 sibling, 0 replies; 4+ messages in thread
From: Ronald @ 2008-02-18  7:25 UTC (permalink / raw)
  To: ronald645; +Cc: linux-wireless

> hey,
> 
> I'm currently using the b43 driver for my BCM4311 chipset. The driver 
> works extremely well. It is the only option under Linux that supports 
> WPA-AES with wpa_supplicant :) (and it's more stable than 
> wpa_supplicant). However, I'm seeing some unexpected behaviour with the 
> card and another chipset. When I enable my soundcard (setting volume 
> from 0 to > 0) the wireless signal seems to drop completely (really 
> funny to see my downloadspeeds go up and down :) ). My question is, is 
> this normal?
> 
> However, I'm not sure if this is related to the b43 driver so don't 
> flame me ;)
> 
>                         TIA, Ronald
> 
Btw, here are my specs (Compaq Presario V6221EU):

00:00.0 RAM memory [0500]: nVidia Corporation C51 Host Bridge 
[10de:02f0] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0
         Capabilities: [44] HyperTransport: Slave or Primary Interface
         Capabilities: [e0] HyperTransport: MSI Mapping Enable- Fixed-

00:00.1 RAM memory [0500]: nVidia Corporation C51 Memory Controller 0 
[10de:02fa] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: 66MHz, fast devsel

00:00.2 RAM memory [0500]: nVidia Corporation C51 Memory Controller 1 
[10de:02fe] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: 66MHz, fast devsel

00:00.3 RAM memory [0500]: nVidia Corporation C51 Memory Controller 5 
[10de:02f8] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: 66MHz, fast devsel

00:00.4 RAM memory [0500]: nVidia Corporation C51 Memory Controller 4 
[10de:02f9] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0

00:00.5 RAM memory [0500]: nVidia Corporation C51 Host Bridge 
[10de:02ff] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0
         Capabilities: [44] #00 [00fe]
         Capabilities: [fc] #00 [0000]

00:00.6 RAM memory [0500]: nVidia Corporation C51 Memory Controller 3 
[10de:027f] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: 66MHz, fast devsel

00:00.7 RAM memory [0500]: nVidia Corporation C51 Memory Controller 2 
[10de:027e] (rev a2)
         Flags: 66MHz, fast devsel

00:02.0 PCI bridge [0604]: nVidia Corporation C51 PCI Express Bridge 
[10de:02fc] (rev a1) (prog-if 00 [Normal decode])
         Flags: bus master, fast devsel, latency 0
         Bus: primary=00, secondary=01, subordinate=01, sec-latency=0
         I/O behind bridge: 00004000-00004fff
         Memory behind bridge: b4000000-b5ffffff
         Prefetchable memory behind bridge: 
00000000d0000000-00000000d01fffff
         Capabilities: [40] Subsystem: nVidia Corporation Unknown device 
[10de:0000]
         Capabilities: [48] Power Management version 2
         Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+ 
Queue=0/1 Enable-
         Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed-
         Capabilities: [80] Express Root Port (Slot+), MSI 00
         Capabilities: [100] Virtual Channel <?>
         Kernel driver in use: pcieport-driver

00:03.0 PCI bridge [0604]: nVidia Corporation C51 PCI Express Bridge 
[10de:02fd] (rev a1) (prog-if 00 [Normal decode])
         Flags: bus master, fast devsel, latency 0
         Bus: primary=00, secondary=03, subordinate=03, sec-latency=0
         Memory behind bridge: b6000000-b7ffffff
         Capabilities: [40] Subsystem: nVidia Corporation Unknown device 
[10de:0000]
         Capabilities: [48] Power Management version 2
         Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+ 
Queue=0/1 Enable-
         Capabilities: [60] HyperTransport: MSI Mapping Enable- Fixed-
         Capabilities: [80] Express Root Port (Slot+), MSI 00
         Capabilities: [100] Virtual Channel <?>
         Kernel driver in use: pcieport-driver

00:05.0 VGA compatible controller [0300]: nVidia Corporation C51 
[Geforce 6150 Go] [10de:0244] (rev a2) (prog-if 00 [VGA controller])
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 21
         Memory at b2000000 (32-bit, non-prefetchable) [size=16M]
         Memory at c0000000 (64-bit, prefetchable) [size=256M]
         Memory at b1000000 (64-bit, non-prefetchable) [size=16M]
         [virtual] Expansion ROM at 50000000 [disabled] [size=128K]
         Capabilities: [48] Power Management version 2
         Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+ 
Queue=0/0 Enable-
         Kernel driver in use: nvidia
         Kernel modules: nvidia

00:09.0 RAM memory [0500]: nVidia Corporation MCP51 Host Bridge 
[10de:0270] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0
         Capabilities: [44] HyperTransport: Slave or Primary Interface
         Capabilities: [e0] HyperTransport: MSI Mapping Enable+ Fixed-

00:0a.0 ISA bridge [0601]: nVidia Corporation MCP51 LPC Bridge 
[10de:0260] (rev a3)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0
         I/O ports at 1d00 [size=128]

00:0a.1 SMBus [0c05]: nVidia Corporation MCP51 SMBus [10de:0264] (rev a3)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: 66MHz, fast devsel, IRQ 10
         I/O ports at 3040 [size=64]
         I/O ports at 3000 [size=64]
         Capabilities: [44] Power Management version 2

00:0a.3 Co-processor [0b40]: nVidia Corporation MCP51 PMU [10de:0271] 
(rev a3)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 10
         Memory at b0040000 (32-bit, non-prefetchable) [size=256K]

00:0b.0 USB Controller [0c03]: nVidia Corporation MCP51 USB Controller 
[10de:026d] (rev a3) (prog-if 10 [OHCI])
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19
         Memory at b0004000 (32-bit, non-prefetchable) [size=4K]
         Capabilities: [44] Power Management version 2
         Kernel driver in use: ohci_hcd

00:0b.1 USB Controller [0c03]: nVidia Corporation MCP51 USB Controller 
[10de:026e] (rev a3) (prog-if 20 [EHCI])
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 19
         Memory at b0005000 (32-bit, non-prefetchable) [size=256]
         Capabilities: [44] Debug port: BAR=1 offset=0098
         Capabilities: [80] Power Management version 2
         Kernel driver in use: ehci_hcd

00:0d.0 IDE interface [0101]: nVidia Corporation MCP51 IDE [10de:0265] 
(rev f1) (prog-if 8a [Master SecP PriP])
         Subsystem: Unknown device [f03c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0
         [virtual] Memory at 000001f0 (32-bit, non-prefetchable) 
[disabled] [size=8]
         [virtual] Memory at 000003f0 (type 3, non-prefetchable) 
[disabled] [size=1]
         [virtual] Memory at 00000170 (32-bit, non-prefetchable) 
[disabled] [size=8]
         [virtual] Memory at 00000370 (type 3, non-prefetchable) 
[disabled] [size=1]
         I/O ports at 3080 [size=16]
         Capabilities: [44] Power Management version 2
         Kernel driver in use: pata_amd

00:0e.0 IDE interface [0101]: nVidia Corporation MCP51 Serial ATA 
Controller [10de:0266] (rev f1) (prog-if 85 [Master SecO PriO])
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 18
         I/O ports at 30c0 [size=8]
         I/O ports at 30b4 [size=4]
         I/O ports at 30b8 [size=8]
         I/O ports at 30b0 [size=4]
         I/O ports at 3090 [size=16]
         Memory at b0006000 (32-bit, non-prefetchable) [size=4K]
         Capabilities: [44] Power Management version 2
         Capabilities: [b0] Message Signalled Interrupts: Mask- 64bit+ 
Queue=0/2 Enable-
         Capabilities: [cc] HyperTransport: MSI Mapping Enable- Fixed+
         Kernel driver in use: sata_nv

00:10.0 PCI bridge [0604]: nVidia Corporation MCP51 PCI Bridge 
[10de:026f] (rev a2) (prog-if 01 [Subtractive decode])
         Flags: bus master, 66MHz, fast devsel, latency 0
         Bus: primary=00, secondary=07, subordinate=07, sec-latency=0
         Capabilities: [b8] Subsystem: Gammagraphx, Inc. Unknown device 
[0000:0000]
         Capabilities: [8c] HyperTransport: MSI Mapping Enable- Fixed-

00:10.1 Audio device [0403]: nVidia Corporation MCP51 High Definition 
Audio [10de:026c] (rev a2)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 20
         Memory at b0000000 (32-bit, non-prefetchable) [size=16K]
         Capabilities: [44] Power Management version 2
         Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ 
Queue=0/0 Enable-
         Capabilities: [6c] HyperTransport: MSI Mapping Enable- Fixed+
         Kernel driver in use: HDA Intel

00:14.0 Bridge [0680]: nVidia Corporation MCP51 Ethernet Controller 
[10de:0269] (rev a3)
         Subsystem: Hewlett-Packard Company Presario V6133CL [103c:30b7]
         Flags: bus master, 66MHz, fast devsel, latency 0, IRQ 17
         Memory at b0008000 (32-bit, non-prefetchable) [size=4K]
         I/O ports at 30e0 [size=8]
         Capabilities: [44] Power Management version 2
         Kernel driver in use: forcedeth

00:18.0 Host bridge [0600]: Advanced Micro Devices [AMD] K8 
[Athlon64/Opteron] HyperTransport Technology Configuration [1022:1100]
         Flags: fast devsel
         Capabilities: [80] HyperTransport: Host or Secondary Interface

00:18.1 Host bridge [0600]: Advanced Micro Devices [AMD] K8 
[Athlon64/Opteron] Address Map [1022:1101]
         Flags: fast devsel

00:18.2 Host bridge [0600]: Advanced Micro Devices [AMD] K8 
[Athlon64/Opteron] DRAM Controller [1022:1102]
         Flags: fast devsel

00:18.3 Host bridge [0600]: Advanced Micro Devices [AMD] K8 
[Athlon64/Opteron] Miscellaneous Control [1022:1103]
         Flags: fast devsel
         Capabilities: [f0] Secure device <?>
         Kernel driver in use: k8temp

03:00.0 Network controller [0280]: Broadcom Corporation BCM94311MCG wlan 
mini-PCI [14e4:4311] (rev 01)
         Subsystem: Hewlett-Packard Company Unknown device [103c:1364]
         Flags: bus master, fast devsel, latency 0, IRQ 16
         Memory at b6000000 (32-bit, non-prefetchable) [size=16K]
         Capabilities: [40] Power Management version 2
         Capabilities: [58] Message Signalled Interrupts: Mask- 64bit- 
Queue=0/0 Enable-
         Capabilities: [d0] Express Legacy Endpoint, MSI 00
         Capabilities: [100] Advanced Error Reporting <?>
         Capabilities: [13c] Virtual Channel <?>
         Kernel driver in use: b43-pci-bridge

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [BUG?] b43: Wireless signal lowers when increasing sound
  2008-02-18  7:23 [BUG?] b43: Wireless signal lowers when increasing sound Ronald
  2008-02-18  7:25 ` Ronald
@ 2008-02-18 15:35 ` John W. Linville
  2008-02-18 19:07   ` Michael Buesch
  1 sibling, 1 reply; 4+ messages in thread
From: John W. Linville @ 2008-02-18 15:35 UTC (permalink / raw)
  To: Ronald; +Cc: linux-wireless

On Mon, Feb 18, 2008 at 08:23:35AM +0100, Ronald wrote:
> hey,
>
> I'm currently using the b43 driver for my BCM4311 chipset. The driver works 
> extremely well. It is the only option under Linux that supports WPA-AES 
> with wpa_supplicant :) (and it's more stable than wpa_supplicant). However, 
> I'm seeing some unexpected behaviour with the card and another chipset. 
> When I enable my soundcard (setting volume from 0 to > 0) the wireless 
> signal seems to drop completely (really funny to see my downloadspeeds go 
> up and down :) ). My question is, is this normal?
>
> However, I'm not sure if this is related to the b43 driver so don't flame 
> me ;)

Very strange...my only guess would be EMI generated from your audio
chipset and/or the speakers in your laptop.

Is it really just the volume setting?  I.E. if you "play" the audio
but with the volume turned down does everything work fine?  Does the
performance continue to degrade as you increase the volume?

Wierd...I'm not sure what we can do about this...

John
-- 
John W. Linville
linville@tuxdriver.com

^ permalink raw reply	[flat|nested] 4+ messages in thread

* Re: [BUG?] b43: Wireless signal lowers when increasing sound
  2008-02-18 15:35 ` John W. Linville
@ 2008-02-18 19:07   ` Michael Buesch
  0 siblings, 0 replies; 4+ messages in thread
From: Michael Buesch @ 2008-02-18 19:07 UTC (permalink / raw)
  To: John W. Linville; +Cc: Ronald, linux-wireless

On Monday 18 February 2008 16:35:11 John W. Linville wrote:
> On Mon, Feb 18, 2008 at 08:23:35AM +0100, Ronald wrote:
> > hey,
> >
> > I'm currently using the b43 driver for my BCM4311 chipset. The driver works 
> > extremely well. It is the only option under Linux that supports WPA-AES 
> > with wpa_supplicant :) (and it's more stable than wpa_supplicant). However, 
> > I'm seeing some unexpected behaviour with the card and another chipset. 
> > When I enable my soundcard (setting volume from 0 to > 0) the wireless 
> > signal seems to drop completely (really funny to see my downloadspeeds go 
> > up and down :) ). My question is, is this normal?
> >
> > However, I'm not sure if this is related to the b43 driver so don't flame 
> > me ;)
> 
> Very strange...my only guess would be EMI generated from your audio
> chipset and/or the speakers in your laptop.
> 
> Is it really just the volume setting?  I.E. if you "play" the audio
> but with the volume turned down does everything work fine?  Does the
> performance continue to degrade as you increase the volume?
> 
> Wierd...I'm not sure what we can do about this...

Heh, yeah. I guess you should buy an FCC rules compliant soundcard instead. ;)
This sounds like EMI.

-- 
Greetings Michael.

^ permalink raw reply	[flat|nested] 4+ messages in thread

end of thread, other threads:[~2008-02-18 19:07 UTC | newest]

Thread overview: 4+ messages (download: mbox.gz follow: Atom feed
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2008-02-18  7:23 [BUG?] b43: Wireless signal lowers when increasing sound Ronald
2008-02-18  7:25 ` Ronald
2008-02-18 15:35 ` John W. Linville
2008-02-18 19:07   ` Michael Buesch

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