On 08/14/2012 02:07 PM, George Wright wrote:
I have a MacBook with a bcm4331 chip which mostly works in Linux (Fedora
17 w/kernel 3.5.1), but I'm noticing horrible packet loss and throughput
a lot of the time.
The setup is basically a small apartment with an 802.11bgn router
sitting in the living room; I've had the laptop sit directly on top of
the router and run ping to another computer wired directly into the
access point and experienced 75% packet loss. File transfers are
experiencing throughput in the region of 200kB/s to 800kB/s. Oddly
enough, the amount of packet loss is significantly reduced if I'm
connected in my bedroom (~20 feet from the router and with a couple of
walls in between). I've also experienced the same problems with my
backup wireless router (a WRT54GL running dd-wrt).
In b43, power management of 802.11n devices has never been implemented in the
fullest form. Thus, it is likely that the gain setting is too high when you are
close to the AP and the resulting distortion is causing failures.
By comparison, on OS X I get 0% packet loss and throughput in the region
of 2MB-3MB/s.
As Broadcom knows the specs for the device, they could get it right. We have to
rely on reverse engineering.
--snip--
I'm loading the b43 module with the following parameters:
options b43 nohwcrypt=1 qos=0 hwpctl=1
I've also tried it with hwpctl=0 to no avail.
Can anyone suggest what may be going on here?
It is unlikely that any of the options will make any difference in this case..
Larry
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