--- On Sat, 2/18/12, Stanislaw Gruszka <sgruszka@xxxxxxxxxx> wrote: > From: Stanislaw Gruszka <sgruszka@xxxxxxxxxx> > Subject: Re: [rt2x00] rt2800usb and RT3070 issues with 54G AP > To: "Walter Goldens" <goldenstranger@xxxxxxxxx> > Cc: linux-wireless@xxxxxxxxxxxxxxx, "Ivo van Doorn" <ivdoorn@xxxxxxxxx> > Date: Saturday, February 18, 2012, 6:56 PM > Hi. > > On Sat, Feb 18, 2012 at 04:11:36AM -0800, Walter Goldens > wrote: > > This is from an N AP: > > > > PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. > > 64 bytes from 192.168.1.1: icmp_req=1 ttl=64 time=1.47 > ms > > 64 bytes from 192.168.1.1: icmp_req=2 ttl=64 time=1.45 > ms > > 64 bytes from 192.168.1.1: icmp_req=3 ttl=64 time=0.952 > ms > > 64 bytes from 192.168.1.1: icmp_req=4 ttl=64 time=11.1 > ms > > 64 bytes from 192.168.1.1: icmp_req=5 ttl=64 time=7.06 > ms > > 64 bytes from 192.168.1.1: icmp_req=6 ttl=64 time=12.8 > ms > [snip] > > And these are from 54G AP: > > > > PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. > > 64 bytes from 192.168.1.1: icmp_req=1 ttl=63 time=8.56 > ms > > 64 bytes from 192.168.1.1: icmp_req=2 ttl=63 time=1.67 > ms > > 64 bytes from 192.168.1.1: icmp_req=3 ttl=63 time=2.94 > ms > > 64 bytes from 192.168.1.1: icmp_req=4 ttl=63 time=1.64 > ms > > 64 bytes from 192.168.1.1: icmp_req=5 ttl=63 time=1.67 > ms > > 64 bytes from 192.168.1.1: icmp_req=6 ttl=63 time=3.70 > ms > > 64 bytes from 192.168.1.1: icmp_req=7 ttl=63 time=1.80 > ms > > 64 bytes from 192.168.1.1: icmp_req=7 ttl=63 time=2.22 > ms (DUP!) > [snip] > > If I use the STA drivers, no such problem occurres with > either N or G APs. > > This, for me, has been a long-standing problem. > > Looks like this could be related with Power-Save. Seems APs > does not > handle PS well (between each ICMP packed our station is put > in > the sleep mode) . Vendor driver has PS disabled, hence > problem > is not observable. > > Try "iwconfig wlan0 power off" and see if it helps. > > Stanislaw Hello again, Unfortunately, disabling PS does not fix the problem: root@dell:~# iwconfig wlan1 power off root@dell:~# ping 192.168.1.1 PING 192.168.1.1 (192.168.1.1) 56(84) bytes of data. 64 bytes from 192.168.1.1: icmp_req=1 ttl=64 time=5.55 ms 64 bytes from 192.168.1.1: icmp_req=2 ttl=64 time=2.09 ms 64 bytes from 192.168.1.1: icmp_req=2 ttl=64 time=4.83 ms (DUP!) 64 bytes from 192.168.1.1: icmp_req=3 ttl=64 time=2.03 ms 64 bytes from 192.168.1.1: icmp_req=5 ttl=64 time=1.71 ms 64 bytes from 192.168.1.1: icmp_req=6 ttl=64 time=1.44 ms 64 bytes from 192.168.1.1: icmp_req=7 ttl=64 time=1.79 ms 64 bytes from 192.168.1.1: icmp_req=8 ttl=64 time=5.15 ms 64 bytes from 192.168.1.1: icmp_req=9 ttl=64 time=2.70 ms 64 bytes from 192.168.1.1: icmp_req=10 ttl=64 time=16.8 ms 64 bytes from 192.168.1.1: icmp_req=10 ttl=64 time=24.1 ms (DUP!) 64 bytes from 192.168.1.1: icmp_req=11 ttl=64 time=13.0 ms ^C --- 192.168.1.1 ping statistics --- 11 packets transmitted, 10 received, +2 duplicates, 9% packet loss, time 10015ms rtt min/avg/max/mdev = 1.443/6.786/24.168/7.023 ms Walter -- 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
