this page says b43 supports my low power bcm4312 in my dell 1545 inspiron.
kernel version 2.6.38-2-686-bigmem (just installed bigmem to see if it would make any difference. it didnt)
i've been through the install / config instructions given above
connection fails, dmesg gives
[ 15.076260] b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23) [ 16.542682] apm: BIOS not found. [ 20.768878] ADDRCONF(NETDEV_UP): wlan0: link is not ready [ 20.774024] sky2 0000:09:00.0: eth0: enabling interface [ 20.774659] ADDRCONF(NETDEV_UP): eth0: link is not ready [ 21.264653] Bluetooth: Core ver 2.15 [ 21.264681] NET: Registered protocol family 31 [ 21.264682] Bluetooth: HCI device and connection manager initialized [ 21.264685] Bluetooth: HCI socket layer initialized [ 21.298107] Bluetooth: L2CAP ver 2.15 [ 21.298110] Bluetooth: L2CAP socket layer initialized [ 21.323169] Bluetooth: BNEP (Ethernet Emulation) ver 1.3 [ 21.323173] Bluetooth: BNEP filters: protocol multicast [ 21.705622] Bluetooth: SCO (Voice Link) ver 0.6 [ 21.705625] Bluetooth: SCO socket layer initialized [ 21.984164] Bluetooth: RFCOMM TTY layer initialized [ 21.984169] Bluetooth: RFCOMM socket layer initialized [ 21.984171] Bluetooth: RFCOMM ver 1.11 [ 22.886256] sky2 0000:09:00.0: eth0: Link is up at 100 Mbps, full duplex, flow control rx [ 22.886385] ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready [ 24.540238] lp: driver loaded but no devices found [ 24.728386] ppdev: user-space parallel port driver [ 39.672728] wlan0: authenticate with 00:1f:6d:bb:7a:80 (try 1) [ 39.679173] wlan0: authenticated [ 39.679523] wlan0: associate with 00:1f:6d:bb:7a:80 (try 1) [ 39.693723] wlan0: RX AssocResp from 00:1f:6d:bb:7a:80 (capab=0x421 status=0 aid=99) [ 39.693727] wlan0: associated [ 39.694819] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready [ 39.954082] EXT4-fs (sdb1): mounted filesystem with ordered data mode. Opts: (null) [ 41.588005] b43-phy0 ERROR: Fatal DMA error: 0x00000800, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 [ 41.588034] b43-phy0 ERROR: This device does not support DMA on your system. It will now be switched to PIO. [ 41.588040] b43-phy0: Controller RESET (DMA error) ... [ 41.588049] b43-phy0 ERROR: Fatal DMA error: 0x00000800, 0x00000000, 0x00000000, 0x00000000, 0x00000000, 0x00000000 [ 41.588054] b43-phy0 ERROR: This device does not support DMA on your system. It will now be switched to PIO. [ 41.588059] b43-phy0: Controller RESET (DMA error) ... [ 41.816259] b43-phy0: Loading firmware version 478.104 (2008-07-01 00:50:23) [ 47.357568] b43-phy0: Controller restarted [ 48.856070] ieee80211 phy0: wlan0: No probe response from AP 00:1f:6d:bb:7a:80 after 500ms, disconnecting. [ 48.868459] cfg80211: Calling CRDA for country: US