Updates:
1. Remove n improves, but not eliminates the problem. I was testing
using ping, which can reach 0% packet loss if you are not doing anything
else. However, if you have too much Internet activity, such as download
large files, or opening dozens of web pages in a few seconds, it's much
easier to drop the connection in one or two minutes, and the period
without Internet is about 10 secs. Seems like NM or the driver is trying
to adjust the link speed, and during that 10 secs Internet is not
accessible at all.
2. lspci -v
0c:00.0 Network controller: Broadcom Corporation BCM4312 802.11b/g (rev 01)
Subsystem: Dell Device 000b
Flags: bus master, fast devsel, latency 0, IRQ 17
Memory at f6cfc000 (64-bit, non-prefetchable) [size=16K]
Capabilities: [40] Power Management version 3
Capabilities: [58] Vendor Specific Information <?>
Capabilities: [e8] Message Signalled Interrupts: Mask- 64bit+ Queue=0/0
Enable-
Capabilities: [d0] Express Endpoint, MSI 00
Capabilities: [100] Advanced Error Reporting <?>
Capabilities: [13c] Virtual Channel <?>
Capabilities: [160] Device Serial Number 23-00-36-ff-ff-4e-e8-24
Capabilities: [16c] Power Budgeting <?>
Kernel driver in use: wl
Kernel modules: wl
I don't know why, but any other driver will not be recognized by NM.
Only when I use the 'wl' driver it will show the device in iwconfig. I
tried backports kernel and modules b43, ssb, or even ndiswrapper, the
device is showing at lspci but not iwconfig.
--
Wireless network keeps reconnecting (ubuntu edgy)
https://bugs.launchpad.net/bugs/64173
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