Bug#696811: b43 wlan0 disappears when on battery

[Elliott Mitchell]

Merely a bystander here trying to figure out certain situations from bug
reports.

Why the heck was this filed against firmware-b43-installer?!  This bug
report doesn't appear to have anything to do with the firmware installer.
`powertop` has been suggested, perhaps this might be a kernel bug.  Yet
neither of these is related to the firmware-b43-installer.  Unless you
had reason to believe this was due to the firmware installer installing
corrupt firmware, this should never have been filed against
firmware-b43-installer.


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Bug#696811: b43 wlan0 disappears when on battery

[Daniel Pocock]

On 23/08/13 15:38, Boris Pek wrote:
 Hi,

 Have you tried to use powertop utility for setting up modules which should be
 enabled when your laptop works from battery?



It was just a default install of the wheezy beta

I have installed several laptops the same way and I only had this
problem on the HP Pavillion d2000

I didn't try changing any other settings as I didn't receive any
feedback about the bug report before now


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Bug#696811: b43 wlan0 disappears when on battery

[Boris Pek]

Hi,

Have you tried to use powertop utility for setting up modules which should be
enabled when your laptop works from battery?

Best wishes,
Boris


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Bug#696811: b43 wlan0 disappears when on battery

[Daniel Pocock]

Package: firmware-b43-installer
Version: 1:015-14
Severity: serious

I've just done a fresh install of wheezy beta 4 amd64 onto a HP Pavilion
dv2000 laptop

wifi requires firmware-b43-installer

After installing firmware and rebooting, it all works fine, as long as
AC power is connected

If the computer boots without AC power, or if the AC power cable is
removed while the computer is running, the wifi stops working.  Wired
ethernet works with or without AC power.

Booting without AC power, I still notice messages about b43 in the dmesg
output

[6.448311] b43-phy0: Broadcom 4311 WLAN found (core revision 13)
[6.560223] Registered led device: b43-phy0::tx
[6.560259] Registered led device: b43-phy0::rx
[6.560291] Registered led device: b43-phy0::radio
[6.560318] Broadcom 43xx driver loaded [ Features: PMNLS ]

and the module appears to be loaded.  However, without AC power, the
wifi controller is completely missing from the output of lspci and no
other wifi commands work (e.g. iwlist).  With AC power, I can see this
in lspci:

07:00.0 Network controller: Broadcom Corporation BCM4311 802.11b/g WLAN
(rev 02)
Subsystem: Hewlett-Packard Company BCM4311 802.11b/g Wireless
LAN Controller
Physical Slot: 5
Flags: bus master, fast devsel, latency 0, IRQ 19
Memory at f430 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [58] Vendor Specific Information: Len=78 ?
Capabilities: [e8] MSI: Enable- Count=1/1 Maskable- 64bit+
Capabilities: [d0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting
Capabilities: [13c] Virtual Channel
Capabilities: [160] Device Serial Number 97-50-73-ff-ff-a0-00-1a
Capabilities: [16c] Power Budgeting ?
Kernel driver in use: b43-pci-bridge

but without AC power, the lspci output doesn't mention any Broadcom
controller.

It is a dual boot system.  In Windows 7 Ultimate, the wifi works fine
with or without AC power.


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