2012/8/14 Larry Finger <larry.fin...@lwfinger.net>: > 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.
I promise to work on this, but I can provide only N-PHY support (we have specs for them). I'll try my best to do some power management for N-PHY for 3.7 merge window. Right now I'm focused on SoC support for my BCM4706 SoC. But fortunately I'm getting everything pushed upstream slowly. Unfortunately BCM4331 is HT-PHY which I can't really improve. We don't have any specs about that PHY type and support is mostly pure luck. I may try to improve is a little since I get BCM4706 support (my SoC has two BCM4331 connected via PCIE), but don't expect much :( -- Rafał _______________________________________________ b43-dev mailing list b43-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/b43-dev
