Hi,

I followed the qos-script howto http://wiki.openwrt.org/doc/uci/qos  for my QoS implementation.

After installing and starting it with:

uci set qos.wan.upload=2000            # Upload speed in kBits/s
uci set qos.wan.download=16000         # Download speed in kBits/s
uci commit qos
/etc/init.d/qos start

I am getting the following error messages:

RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: No such file or directory
RTNETLINK answers: Invalid argument
We have an error talking to the kernel
[...]

Looking in forums it seems that one or the other module is missing but couldn't find clear indication which one.
Any hint is appreciated.
Here is what I have installed:

root@OpenWrt:/etc/config# uname -a
Linux OpenWrt 3.3.4 #1 Mon May 7 12:28:12 PDT 2012 mips GNU/Linux

root@OpenWrt:/etc/config# opkg list-installed
base-files - 107-r31639
base-files-network - 4
busybox - 1.19.4-1
crda - 1.1.2-1
dnsmasq - 2.59-3
dropbear - 2011.54-2
firewall - 2-49
gesftpserver - r228-1
hotplug2 - 1.0-beta-4
ip - 3.2.0-2
iptables - 1.4.10-4
iptables-mod-conntrack-extra - 1.4.10-4
iptables-mod-filter - 1.4.10-4
iptables-mod-ipopt - 1.4.10-4
iptables-mod-ipp2p - 1.42-1
iw - 3.3-1
kernel - 3.3.4-1-9129d8b7ea9913efb59ba3598525ca75
kmod-ath - 3.3.4+2012-04-17-2
kmod-ath9k - 3.3.4+2012-04-17-2
kmod-ath9k-common - 3.3.4+2012-04-17-2
kmod-cfg80211 - 3.3.4+2012-04-17-2
kmod-crypto-aes - 3.3.4-1
kmod-crypto-arc4 - 3.3.4-1
kmod-crypto-core - 3.3.4-1
kmod-gpio-button-hotplug - 3.3.4-1
kmod-ifb - 3.3.4-1
kmod-ipt-compat-xtables - 3.3.4+1.42-1
kmod-ipt-conntrack - 3.3.4-1
kmod-ipt-conntrack-extra - 3.3.4-1
kmod-ipt-core - 3.3.4-1
kmod-ipt-filter - 3.3.4-1
kmod-ipt-ipopt - 3.3.4-1
kmod-ipt-ipp2p - 3.3.4+1.42-1
kmod-ipt-nat - 3.3.4-1
kmod-ipt-nathelper - 3.3.4-1
kmod-leds-gpio - 3.3.4-1
kmod-ledtrig-default-on - 3.3.4-1
kmod-ledtrig-netdev - 3.3.4-1
kmod-ledtrig-timer - 3.3.4-1
kmod-ledtrig-usbdev - 3.3.4-1
kmod-lib-crc-ccitt - 3.3.4-1
kmod-lib-textsearch - 3.3.4-1
kmod-mac80211 - 3.3.4+2012-04-17-2
kmod-nls-base - 3.3.4-1
kmod-ppp - 3.3.4-1
kmod-pppoe - 3.3.4-1
kmod-sched - 3.3.4-1
kmod-usb-core - 3.3.4-1
kmod-usb-ohci - 3.3.4-1
kmod-usb2 - 3.3.4-1
kmod-wdt-ath79 - 3.3.4-1
libc - 0.9.33-107
libgcc - 4.6-linaro-107
libip4tc - 1.4.10-4
libiwinfo - 33
libiwinfo-lua - 33
liblua - 5.1.4-8
libnl-tiny - 0.1-3
libpthread - 0.9.33-107
libuci - 2012-03-28.1-1
libuci-lua - 2012-03-28.1-1
libxtables - 1.4.10-4
lua - 5.1.4-8
luci - trunk+svn8676-1
luci-app-firewall - trunk+svn8676-1
luci-app-qos - trunk+svn8676-1
luci-i18n-english - trunk+svn8676-1
luci-lib-core - trunk+svn8676-1
luci-lib-ipkg - trunk+svn8676-1
luci-lib-lmo - trunk+svn8676-1
luci-lib-nixio - trunk+svn8676-1
luci-lib-sys - trunk+svn8676-1
luci-lib-web - trunk+svn8676-1
luci-mod-admin-core - trunk+svn8676-1
luci-mod-admin-full - trunk+svn8676-1
luci-proto-core - trunk+svn8676-1
luci-proto-ppp - trunk+svn8676-1
luci-sgi-cgi - trunk+svn8676-1
luci-theme-base - trunk+svn8676-1
luci-theme-openwrt - trunk+svn8676-1
mtd - 17
opkg - 618-2
ppp - 2.4.5-5
ppp-mod-pppoe - 2.4.5-5
qos-scripts - 1.2.1-6
swconfig - 10
tc - 3.2.0-2
uboot-envtools - 2011.06-4
uci - 2012-03-28.1-1
uhttpd - 32
wireless-tools - 29-4
wpad-mini - 20120428-1

lsmod
Module                  Size  Used by    Tainted: G
ifb                     2576  0
xt_HL                   1280  0
xt_hl                    800  0
xt_ecn                  1248  0
ipt_ECN                 1344  0
xt_CLASSIFY              576  0
xt_time                 1536  0
xt_tcpmss                992  0
xt_statistic             768  0
xt_mark                  672 26
xt_length                688  5
xt_DSCP                 1440  0
xt_dscp                  992  0
xt_recent               5760  0
xt_helper                864  0
xt_connmark             1040  2
xt_connbytes            1504  0
xt_string                752  0
xt_layer7               9124  0
ts_fsm                  2576  0
ts_bm                   1424  0
ts_kmp                  1344  0
ath79_wdt               2320  1
ohci_hcd               16240  0
ledtrig_usbdev          2112  0
ledtrig_netdev          3264  0
xt_ipp2p                6928  3
nf_nat_irc               864  0
nf_conntrack_irc        2544  1 nf_nat_irc
nf_nat_ftp              1056  0
nf_conntrack_ftp        4496  1 nf_nat_ftp
compat_xtables          1884  1 xt_ipp2p
ipt_MASQUERADE          1056  1
iptable_nat             2693  1
nf_nat                 10916  4 nf_nat_irc,nf_nat_ftp,ipt_MASQUERADE,iptable_nat
xt_conntrack            2128  0
xt_CT                   1296  0
xt_NOTRACK               528  0
iptable_raw              640  0
xt_state                 688 15
nf_conntrack_ipv4       4500 20 iptable_nat,nf_nat
nf_defrag_ipv4           774  1 nf_conntrack_ipv4
nf_conntrack           40999 16 xt_helper,xt_connmark,xt_connbytes,xt_layer7,nf_nat_irc,nf_conntrack_irc,nf_nat_ftp,nf_conntrack_ftp,ipt_MASQUERADE,iptable_nat,nf_nat,xt_conntrack,xt_CT,xt_NOTRACK,xt_state,nf_conntrack_ipv4
ehci_hcd               32848  0
pppoe                   7552  0
pppox                   1370  1 pppoe
ipt_REJECT              1888  0
xt_TCPMSS               2640  0
ipt_LOG                 6240  4
xt_comment               480  0
xt_multiport            1184  9
xt_mac                   608  0
xt_limit                1024  0
iptable_mangle           912  1
iptable_filter           672  1
ip_tables               9085  4 iptable_nat,iptable_raw,iptable_mangle,iptable_filter
xt_tcpudp               1712 13
x_tables               10949 38 xt_HL,xt_hl,xt_ecn,ipt_ECN,xt_CLASSIFY,xt_time,xt_tcpmss,xt_statistic,xt_mark,xt_length,xt_DSCP,xt_dscp,xt_recent,xt_helper,xt_connmark,xt_connbytes,xt_string,xt_layer7,xt_ipp2p,compat_xtables,ipt_MASQUERADE,iptable_nat,xt_conntrack,xt_CT,xt_NOTRACK,iptable_raw,xt_state,ipt_REJECT,xt_TCPMSS,ipt_LOG,xt_comment,xt_multiport,xt_mac,xt_limit,iptable_mangle,iptable_filter,ip_tables,xt_tcpudp
ppp_async               6032  0
ppp_generic            19298  3 pppoe,pppox,ppp_async
slhc                    4587  1 ppp_generic
ath9k                  82123  0
ath9k_common            1513  1 ath9k
ath9k_hw              324720  2 ath9k,ath9k_common
ath                    14777  3 ath9k,ath9k_common,ath9k_hw
mac80211              257126  1 ath9k
usbcore               104340  4 ohci_hcd,ledtrig_usbdev,ehci_hcd
usb_common               562  1 usbcore
nls_base                4958  1 usbcore
crc_ccitt               1019  1 ppp_async
cfg80211              145205  3 ath9k,ath,mac80211
compat                   933  5 ath9k,ath9k_common,ath9k_hw,mac80211,cfg80211
arc4                     848  2
aes_generic            29961  0
crypto_algapi          10668  2 arc4,aes_generic
ledtrig_timer           1152  0
ledtrig_default_on       496  0
leds_gpio               1632  0
gpio_button_hotplug     3264  0

Again thanks for comments and help.
Stefan