Date: Fri, 29 Mar 2013 09:14:44 GMT From: Yakov Galka <ybungalobill+bsd@gmail.com> To: freebsd-gnats-submit@FreeBSD.org Subject: kern/177465: 20%-100% packet loss with iwn driver Message-ID: <201303290914.r2T9Eiw9016416@red.freebsd.org> Resent-Message-ID: <201303290920.r2T9K03o007125@freefall.freebsd.org>
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>Number: 177465 >Category: kern >Synopsis: 20%-100% packet loss with iwn driver >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-bugs >State: open >Quarter: >Keywords: >Date-Required: >Class: sw-bug >Submitter-Id: current-users >Arrival-Date: Fri Mar 29 09:20:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Yakov Galka >Release: 9.1-RELEASE >Organization: >Environment: FreeBSD orthanc 9.1-RELEASE FreeBSD 9.1-RELEASE #0 r243825: Tue Dec 4 09:23:10 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64 >Description: Dell Latitude E6530 with Intel Centrino Advanced-N 6205, connecting to an unencrypted access point 3m away. Pinging the access point gives 20% to 100% packet loss, 8 out of 10 days I tried. The access point is an Edimax router with 802.11n support. Loading Ubuntu LiveCD at the same conditions gives 0% packet loss, always. Some report similar problems, see replies to http://forums.freebsd.org/showthread.php?t=38685 >How-To-Repeat: $ dmesg | grep -E "wlan|iwn" module iwn already present! iwn0: <Intel Centrino Advanced-N 6205> mem 0xf7600000-0xf7601fff irq 17 at device 0.0 on pci3 wlan0: Ethernet address: xx:xx:xx:xx:xx:xx $ grep -E "wlan|iwn" /boot/loader.conf if_iwn_load="YES" iwn4965fw_load="YES" iwn1000fw_load="YES" iwn5000fw_load="YES" iwn5150fw_load="YES" iwn6000fw_load="YES" iwn6000g2afw_load="YES" iwn6000g2bfw_load="YES" iwn6050fw_load="YES" wlan_wep_load="YES" wlan_ccmp_load="YES" wlan_tkip_load="YES" $ grep -E "wlan|iwn" /etc/rc.conf wlans_iwn0="wlan0" ifconfig_wlan0="DHCP" $ kldstat Id Refs Address Size Name 1 34 0xffffffff80200000 1323388 kernel 3 1 0xffffffff81549000 c6d2f0 nvidia.ko 4 2 0xffffffff821b7000 484f8 linux.ko 5 1 0xffffffff82200000 2ed08 iwn4965fw.ko 6 1 0xffffffff8222f000 53520 iwn1000fw.ko 7 1 0xffffffff82283000 54188 iwn5000fw.ko 8 1 0xffffffff822d8000 534a8 iwn5150fw.ko 9 1 0xffffffff8232c000 6fe80 iwn6000fw.ko 10 1 0xffffffff8239c000 6d5c8 iwn6000g2afw.ko 11 1 0xffffffff8240a000 71758 iwn6000g2bfw.ko 12 1 0xffffffff8247c000 739d0 iwn6050fw.ko $ ifconfig iwn0 && ifconfig wlan0 iwn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290 ether xx:xx:xx:xx:xx:xx nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: IEEE 802.11 Wireless Ethernet autoselect mode 11ng status: associated wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 ether xx:xx:xx:xx:xx:xx inet 192.168.2.103 netmask 0xffffff00 broadcast 192.168.2.255 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: IEEE 802.11 Wireless Ethernet DS/1Mbps mode 11ng status: associated ssid Palantir channel 13 (2472 MHz 11g ht/20) bssid xx:xx:xx:xx:xx:xx country US authmode OPEN privacy OFF txpower 13 bmiss 10 scanvalid 60 bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 64 protmode CTS ampdulimit 32k ampdudensity 8 -amsdutx amsdurx shortgi wme $ ping 192.168.2.1 [...] 1076 packets transmitted, 30 packets received, 97.2% packet loss round-trip min/avg/max/stddev = 1.356/104.635/2008.506/396.671 ms >Fix: >Release-Note: >Audit-Trail: >Unformatted:
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