Hi, I don't know which one (else) can be fit for bcm4331 802.11a/b/g/n (rev 02) >From http://wiki.debian.org/bcm43xx#b43_and_b43legacy I tried: 1] aptitude install firmware-b43-lpphy-installer No chroot environment found. Starting normal installation No supported card found. Use proper b43 or b43legacy firmware. Aborting. 2] # aptitude install firmware-b43-installer No chroot environment found. Starting normal installation Unsupported device(s) found: PCI id 14e4:4331 Aborting. both of the listed are not working, lspci showed: 03:00.0 Network controller: Broadcom Corporation BCM4331 802.11a/b/g/n (rev 02) Thanks for providing some suggestions or links. P.S extra info: $ uname -a Linux debian 3.2.0-rc6-3.2-mj-lina #1 SMP Sat Dec 17 13:14:26 SGT 2011 x86_64 GNU/Linux # modprobe b43 # lsmod | grep -e b43 -e bcma b43 349208 0 mac80211 228257 1 b43 cfg80211 173366 2 b43,mac80211 ssb 52359 1 b43 pcmcia 40840 2 b43,ssb rng_core 12614 1 b43 bcma 23572 1 b43 mmc_core 84258 4 b43,ssb,sdhci_pci,sdhci # dmesg [29546.428354] b43-phy0: Broadcom 4331 WLAN found (core revision 29) [29546.428389] bcma: Switched to core: 0x812 [29546.428819] b43-phy0 ERROR: FOUND UNSUPPORTED PHY (Analog 9, Type 7, Revision 1) [29546.428837] b43: probe of bcma0:0 failed with error -95 [29546.428878] Broadcom 43xx driver loaded [ Features: PMNLS ] [29683.101838] applesmc: F1Mn: write arg fail -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html