Date: Sun, 10 Apr 2016 13:02:02 +0200 From: Dave Cottlehuber <dch@skunkwerks.at> To: freebsd-wireless@freebsd.org Subject: "no buffer space available" EDIMAX EW-7811UN Wireless USB Adapter Message-ID: <1460286122.3298383.574172017.3A717528@webmail.messagingengine.com>
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Hi, I got an EDIMAX EW-7811UN Wireless USB Adapter [1] (150 Mbit/s, IEEE802.11b/g/n) to use on a few systems that don't yet have supported onboard adapters. While using this I get `no buffer space available` regularly, including from dhclient. This sometimes requires me to hard reboot to regain network connectivity. Is there anything I can do about this? BTW specific recommendations on better-supported USB widgets are welcome. Hopefully relevant/useful info below. [1]: http://www.edimax.com/edimax/merchandise/merchandise_detail/data/edimax/global/wireless_adapters_n150/ew-7811un root@nucl:~ # uname -v FreeBSD 10.3-RELEASE #0 r297264: Fri Mar 25 02:10:02 UTC 2016 root@releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC root@nucl:~ # dmesg | egrep -i 'wlan|urtwn' urtwn0: <vendor 0x0bda product 0x8191, class 0/0, rev 2.00/2.00, addr 3> on usbus0 urtwn0: MAC/BB RTL8188CUS, RF 6052 1T1R wlan0: Ethernet address: 74:da:38:41:6e:7f wlan0: link state changed to UP root@nucl:~ # kldstat Id Refs Address Size Name 1 68 0xffffffff80200000 17bc680 kernel 2 1 0xffffffff819bd000 2fc428 zfs.ko 3 12 0xffffffff81cba000 6040 opensolaris.ko 4 1 0xffffffff81cc1000 a858 if_tap.ko 5 1 0xffffffff81ccc000 11c28 if_bridge.ko 6 2 0xffffffff81cde000 8490 bridgestp.ko 7 1 0xffffffff81ce7000 157c0 aio.ko 8 1 0xffffffff81cfd000 1598 accf_data.ko 9 1 0xffffffff81cff000 1850 accf_dns.ko 10 1 0xffffffff81d01000 4a70 coretemp.ko 11 1 0xffffffff81d06000 1d6080 vmm.ko 12 1 0xffffffff81edd000 4d48 nmdm.ko 13 1 0xffffffff81ee2000 2188 dtraceall.ko 14 2 0xffffffff81ee5000 7040 profile.ko 15 11 0xffffffff81eed000 591a0 dtrace.ko 16 2 0xffffffff81f47000 1d548 systrace_freebsd32.ko 17 2 0xffffffff81f65000 1df50 systrace.ko 18 2 0xffffffff81f83000 3458 sdt.ko 19 2 0xffffffff81f87000 6730 lockstat.ko 20 2 0xffffffff81f8e000 620f0 fasttrap.ko 21 2 0xffffffff81ff1000 9658 fbt.ko 22 2 0xffffffff81ffb000 5ee8 dtnfscl.ko 23 2 0xffffffff82001000 60c0 dtmalloc.ko 24 1 0xffffffff82008000 3108 cc_htcp.ko 25 1 0xffffffff82711000 fdb4 geom_eli.ko 26 1 0xffffffff82721000 1f55e crypto.ko 27 1 0xffffffff82741000 2ba8 uhid.ko 28 1 0xffffffff82744000 11da8 if_urtwn.ko root@nucl:~ # cat /etc/rc.conf ifconfig_em0="DHCP" ifconfig_em0_ipv6="inet6 accept_rtadv" # wifi wlans_urtwn0="wlan0" ifconfig_wlan0="WPA DHCP" root@nucl:~ # root@nucl:~ # ifconfig wlan0 list caps drivercaps=2181c001<STA,SHSLOT,SHPREAMBLE,MONITOR,WPA1,WPA2,BGSCAN> root@nucl:~ # ifconfig -a em0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 options=4019b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,VLAN_HWCSUM,TSO4,VLAN_HWTSO> ether b8:ae:ed:78:fb:0c inet6 fe80::baae:edff:fe78:fb0c%em0 prefixlen 64 scopeid 0x1 inet6 2001:470:26:2bf:baae:edff:fe78:fb0c prefixlen 64 autoconf inet 10.0.0.11 netmask 0xffffff00 broadcast 10.0.0.255 nd6 options=23<PERFORMNUD,ACCEPT_RTADV,AUTO_LINKLOCAL> media: Ethernet autoselect (1000baseT <full-duplex>) status: active lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384 options=600003<RXCSUM,TXCSUM,RXCSUM_IPV6,TXCSUM_IPV6> inet6 ::1 prefixlen 128 inet6 fe80::1%lo0 prefixlen 64 scopeid 0x2 inet 127.0.0.1 netmask 0xff000000 nd6 options=21<PERFORMNUD,AUTO_LINKLOCAL> urtwn0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 2290 ether 74:da:38:41:6e:7f nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: IEEE 802.11 Wireless Ethernet autoselect mode 11g status: associated wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500 ether 74:da:38:41:6e:7f inet 10.0.0.41 netmask 0xffffff00 broadcast 10.0.0.255 nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL> media: IEEE 802.11 Wireless Ethernet OFDM/54Mbps mode 11g status: associated ssid cottlehubers channel 10 (2457 MHz 11g) bssid bc:f2:af:e3:1e:92 country US authmode WPA2/802.11i privacy ON deftxkey UNDEF AES-CCM 3:128-bit txpower 0 bmiss 7 scanvalid 60 bgscan bgscanintvl 300 bgscanidle 250 roam:rssi 7 roam:rate 5 protmode CTS roaming MANUAL root@nucl:~ # netstat -m 1024/2021/3045 mbufs in use (current/cache/total) 1023/1007/2030/1011284 mbuf clusters in use (current/cache/total/max) 1023/1001 mbuf+clusters out of packet secondary zone in use (current/cache) 0/4/4/505642 4k (page size) jumbo clusters in use (current/cache/total/max) 0/0/0/149819 9k jumbo clusters in use (current/cache/total/max) 0/0/0/84273 16k jumbo clusters in use (current/cache/total/max) 2302K/2535K/4837K bytes allocated to network (current/cache/total) 0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters) 0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters) 0/0/0 requests for jumbo clusters delayed (4k/9k/16k) 0/0/0 requests for jumbo clusters denied (4k/9k/16k) 0 requests for sfbufs denied 0 requests for sfbufs delayed 0 requests for I/O initiated by sendfile root@nucl:~ # sysctl net.wlan net.wlan.0.inact_init: 30 net.wlan.0.inact_auth: 180 net.wlan.0.inact_probe: 30 net.wlan.0.inact_run: 300 net.wlan.0.bmiss_max: 2 net.wlan.0.debug: 0 net.wlan.0.driver_caps: 562085889 net.wlan.0.%parent: urtwn0 net.wlan.mesh.maxholding: 2 net.wlan.mesh.maxretries: 2 net.wlan.mesh.backofftimeout: 5000 net.wlan.mesh.confirmtimeout: 40 net.wlan.mesh.holdingtimeout: 40 net.wlan.mesh.retrytimeout: 40 net.wlan.mesh.gateint: 10000 net.wlan.hwmp.inact: 5000 net.wlan.hwmp.rootconfint: 2000 net.wlan.hwmp.rannint: 1000 net.wlan.hwmp.rootint: 2000 net.wlan.hwmp.roottimeout: 5000 net.wlan.hwmp.net_diameter_traversal_time: 512 net.wlan.hwmp.maxpreq_retries: 3 net.wlan.hwmp.pathlifetime: 5000 net.wlan.hwmp.targetonly: 0 net.wlan.addba_maxtries: 3 net.wlan.addba_backoff: 10000 net.wlan.addba_timeout: 250 net.wlan.recv_bar: 1 net.wlan.ampdu_age: 500 net.wlan.debug: 0 net.wlan.cac_timeout: 60 net.wlan.nol_timeout: 1800
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