Messages in this thread | | | Date | Thu, 4 Mar 2004 19:01:55 +0100 | From | Thomas Mueller <> | Subject | 2.6 much worse than 2.4 on poor wlan reception |
| |
Hi,
I have big problems with kernel 2.6 and WLAN. Quite often the connection interrupts completely, I can't transfer anything for minutes - making 2.6 unusable for me :-( I'm only about 5 meters away from my AP, but unfortunately there's a celeiling between me and the AP to the reception is poor.
My hardware is a SMC 2632 PCMCIA card (802.11b) in a IBM Thinkpad A30 and a SMC AP.
lspci: 02:00.0 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev 80) 02:00.1 CardBus bridge: Ricoh Co Ltd RL5c476 II (rev 80)
blade:~# cardctl ident Socket 0: no product info available Socket 1: product info: "SMC", "SMC2632W", "Version 01.02", "" manfid: 0x0156, 0x0002 function: 6 (network)
The wireless-tools have version 26+27pre10-3, pcmcia-cs has 3.2.5, both from Debian Sid. I have tried kernels 2.6.0, .1 and .2. Every kernel 2.4 I've had running until now worked very well.
----------------------------------------------------------- 2.4.20:
blade:~# iwconfig eth1 eth1 IEEE 802.11-DS ESSID:"WLAN" Nickname:"Prism I" Mode:Managed Frequency:2.412GHz Access Point:00:60:B3:17:F8:8C Bit Rate:11Mb/s Tx-Power=15 dBm Sensitivity:1/3 Retry min limit:8 RTS thr:off Fragment thr:off Encryption key:[ secret ] Security mode:open Power Management:off Link Quality:1/92 Signal level:-101 dBm Noise level:-149 dBm Rx invalid nwid:0 Rx invalid crypt:661 Rx invalid frag:0 Tx excessive retries:2751 Invalid misc:0 Missed beacon:0
lsmod: orinoco_cs 4776 1 orinoco 32068 0 [orinoco_cs] hermes 6244 0 [orinoco_cs orinoco] ds 7060 2 [orinoco_cs] yenta_socket 10080 2 pcmcia_core 44928 0 [orinoco_cs ds yenta_socket]
tmm@blade:~$ netio -u 10.0.0.15 NETIO - Network Throughput Benchmark, Version 1.21 (C) 1997-2003 Kai Uwe Rommel UDP connection established. Packet size 1k bytes: 557 KByte/s (0%) Tx, 261 KByte/s (73%) Rx. Packet size 2k bytes: 553 KByte/s (0%) Tx, 89 KByte/s (90%) Rx. Packet size 4k bytes: 626 KByte/s (0%) Tx, 61444 Byte/s (92%) Rx. Packet size 8k bytes: 517 KByte/s (2%) Tx, 13393 Byte/s (98%) Rx. Packet size 16k bytes: 565 KByte/s (3%) Tx, 10924 Byte/s (98%) Rx. Packet size 32k bytes: 565 KByte/s (3%) Tx, 13787 Byte/s (98%) Rx. Done.
----------------------------------------------------------- 2.6.2:
blade:~# iwconfig eth1 eth1 IEEE 802.11-DS ESSID:"WLAN" Nickname:"Prism I" Mode:Managed Frequency:2.412GHz Access Point:00:60:B3:17:F8:8C Bit Rate:11Mb/s Tx-Power=15 dBm Sensitivity:1/3 Retry min limit:8 RTS thr:off Fragment thr:off Encryption key:[ secret ] Security mode:open Power Management:off Link Quality:1/92 Signal level:-101 dBm Noise level:-149 dBm Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0 Tx excessive retries:0 Invalid misc:0 Missed beacon:0
orinoco_cs 9192 1 orinoco 43980 1 orinoco_cs hermes 8512 2 orinoco_cs,orinoco ds 15940 5 orinoco_cs i82365 20876 1 pcmcia_core 71456 3 orinoco_cs,ds,i82365
tmm@blade:~$ netio -u 10.0.0.15 NETIO - Network Throughput Benchmark, Version 1.21 (C) 1997-2003 Kai Uwe Rommel UDP connection established. Packet size 1k bytes: 289 KByte/s (99%) Tx, 223 KByte/s (75%) Rx. Packet size 2k bytes: 0 Byte/s (100%) Tx, 21 KByte/s (91%) Rx. Packet size 4k bytes: 440 KByte/s (99%) Tx, 61333 Byte/s (94%) Rx. Packet size 8k bytes: 382 KByte/s (96%) Tx, 14438 Byte/s (98%) Rx. Packet size 16k bytes: 369 KByte/s (96%) Tx, 2365 Byte/s (98%) Rx. Packet size 32k bytes: 239 KByte/s (98%) Tx, 3005 Byte/s (98%) Rx. Done.
There was a break when netio transfered the 2k blocks.
My log is full of entries like this one: Mar 1 17:54:12 blade kernel: eth1: New link status: AP Out of Range (0004) Mar 1 17:54:12 blade kernel: eth1: New link status: AP In Range (0005) Mar 1 17:54:16 blade kernel: eth1: New link status: AP Out of Range (0004) Mar 1 17:54:16 blade kernel: eth1: New link status: AP In Range (0005) Mar 1 17:54:19 blade kernel: eth1: New link status: AP Out of Range (0004) Mar 1 17:54:20 blade kernel: eth1: New link status: AP In Range (0005) Mar 1 17:54:22 blade kernel: eth1: New link status: AP Out of Range (0004)
Kernel 2.4 works far better in the poor reception situation I have, anyone any idea what I could do without moving the AP or laptop? When I'm near my AP everything works fine with 2.6 too.
BTW: removing the PCMCIA card when it's in use freezes my system completely, that was no problem with 2.4.
Thanks a lot!
-- Thomas Mueller - http://www.tmueller.com for pgp key (95702B3B) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |