On Wed, 2009-07-29 at 05:01 +0800, Valdis.Kletnieks@xxxxxx wrote: > Dell Latitude D820 laptop, lspci reports the network card as: > > 0c:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG [Golan] Netwo rk Connection (rev 02) > > iwlwifi driver in use, card associated via wpa_supplicant but not being > actively used > > # iwconfig > wlan0 IEEE 802.11abg ESSID:"VT-Wireless" > Mode:Managed Frequency:2.447 GHz Access Point: 00:11:20:A4:4C:10 > Bit Rate=54 Mb/s Tx-Power=15 dBm > Retry long limit:7 RTS thr:off Fragment thr:off > Encryption key:<lopped out> [2] > Link Quality=62/70 Signal level=-48 dBm > Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 > Tx excessive retries:0 Invalid misc:0 Missed beacon:0 > # cat /proc/net/wireless > Inter-| sta-| Quality | Discarded packets | Missed | WE > face | tus | link level noise | nwid crypt frag retry misc | beacon | 22 > wlan0: 0000 63. -47. -256 0 0 0 0 0 0 > wlan1: 0000 0 0 0 0 0 0 0 0 0 > wlan2: 0000 0 0 0 0 0 0 0 0 0 > > Where did that -256 for "noise" come from? It ends up confusing the > gkrellm-wifi plugin, it reports a S/N of 219dB ;) This should be related to http://git.kernel.org/?p=linux/kernel/git/linville/wireless-testing.git;a=commit;h=fdb897ea5c77836f890033d563336ab0c94c9222 But I don't think this is an ABI broken. User space should parse the trailing '.' to see if a field is updated or not because there are cards not capable to report hardware noise level anyway. Johannes? Thanks, -yi -- 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
