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Old 04-17-2016, 12:54 AM   #1
psitae
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Intermittent internet is temporarily fixed my unplugging wifi


Hi Friends and Family,

I am currently using a b43 module internet driver on my Macbook 9.1. Also I am running Linux Mint 17.2.

My internet is hopelessly intermittent. For starters, the module does not load automatically - I must run "modprobe b43" every time I restart my system.

Secondly, it will randomly disconnect my internet (this problem is independent of wifi source, but seems to get exponentially worse if many people are using the same wifi). The problem is solved temporarily by turning the wifi off and back on again, but the same thing is sure to happen again soon.

Does anyone know what is happening - why this problem is occurring?

Should I change drivers? If so, which one would be recommended for my hardware?

Thank you for your help
 
Old 04-17-2016, 02:18 AM   #2
ardvark71
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Quote:
Originally Posted by psitae View Post
Should I change drivers? If so, which one would be recommended for my hardware?
Hi...

You might be able to do that. If you would, please open a terminal and post the results of this command...

Code:
lspci -nnk | grep -i net -A2
If this is a USB adapter, please use this command instead...

Code:
lsusb
Regards...
 
Old 04-17-2016, 02:26 AM   #3
ferrari
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Please share your wireless device chipset details
Code:
lshw -C Network
That will help others to advise further.

Since you must manually load the b43 driver after each boot, it reads like the b43 module might be blacklisted. Check that this is not the case in /etc/modprobe.d/blacklist.conf (or other file in /etc/modprobe.d/ directory).
 
Old 04-17-2016, 12:01 PM   #4
psitae
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Thanks for the help guys

Here is the output for "lshw -C Network"

Code:
  *-network               
       description: Ethernet interface
       product: NetXtreme BCM57765 Gigabit Ethernet PCIe
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth1
       version: 10
       serial: 40:6c:8f:40:69:5d
       capacity: 1Gbit/s
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi msix pciexpress bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation
       configuration: autonegotiation=on broadcast=yes driver=tg3 driverversion=3.137 firmware=57765-v1.37 latency=0 link=no multicast=yes port=twisted pair
       resources: irq:0 memory:c1800000-c180ffff memory:c1810000-c181ffff
  *-network
       description: Network controller
       product: BCM4331 802.11a/b/g/n
       vendor: Broadcom Corporation
       physical id: 0
       bus info: pci@0000:03:00.0
       version: 02
       width: 64 bits
       clock: 33MHz
       capabilities: pm msi pciexpress bus_master cap_list
       configuration: driver=bcma-pci-bridge latency=0
       resources: irq:17 memory:c1a00000-c1a03fff
  *-network
       description: Wireless interface
       physical id: 2
       logical name: wlan2
       serial: 7c:d1:c3:78:db:26
       capabilities: ethernet physical wireless
       configuration: broadcast=yes driver=b43 driverversion=4.4.1+ firmware=666.2 ip=192.168.1.7 link=yes multicast=yes wireless=IEEE 802.11bg
and also "lspci -nnk"

Code:
02:00.0 Ethernet controller [0200]: Broadcom Corporation NetXtreme BCM57765 Gigabit Ethernet PCIe [14e4:16b4] (rev 10)
	Subsystem: Broadcom Corporation NetXtreme BCM57765 Gigabit Ethernet PCIe [14e4:16b4]
	Kernel driver in use: tg3
02:00.1 SD Host controller [0805]: Broadcom Corporation BCM57765/57785 SDXC/MMC Card Reader [14e4:16bc] (rev 10)
--
03:00.0 Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n [14e4:4331] (rev 02)
	Subsystem: Broadcom Corporation BCM4331 802.11a/b/g/n [14e4:4331]
	Kernel driver in use: bcma-pci-bridge
Thanks for helping a newb!
 
Old 04-17-2016, 12:08 PM   #5
psitae
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By the way, I checked my blacklist file with the following command.

Code:
grep b43 /etc/modprobe.b/blacklist.conf
And it is not blacklisted. Could this problem happen if I removed it with rmmod and then put it back?
 
Old 04-17-2016, 04:20 PM   #6
ardvark71
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Quote:
Originally Posted by psitae View Post
03:00.0 Network controller [0280]: Broadcom Corporation BCM4331 802.11a/b/g/n [14e4:4331] (rev 02)
Subsystem: Broadcom Corporation BCM4331 802.11a/b/g/n [14e4:4331]
Kernel driver in use: bcma-pci-bridge
Hi...

You can try Broadcom's STA driver with your device instead of the b43. To install it, you should be able to use the Driver Manager, as shown here. Just make sure that your device and the package "bcmwl-kernel-source" is listed.

If you have any problems, let us know.

Regards...

Last edited by ardvark71; 04-17-2016 at 04:22 PM. Reason: Correction/Added comment.
 
Old 04-17-2016, 05:15 PM   #7
ferrari
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No, removing and/or reloading it won't cause any issues like this. Anyway, your wireless chipset is reported as 14e4:4331, and this is supported by the bcma driver apparently.
Code:
# modinfo bcma|grep 4331
alias:          pci:v000014E4d00004331sv*sd*bc*sc*i*
Anyway, the following command will show what other supporting modules are loaded
Code:
lsmod|grep bcma
The proprietary Broadcom driver may be a better option for stability eg

https://wiki.debian.org/wl

You might be best advised to post in a Linux Mint forum to get specific advice about doing this.

Last edited by ferrari; 04-17-2016 at 05:16 PM.
 
  


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