SDIO Wi-Fi card packet loss problem

Sérgio sergiolinux at gmail.com
Wed Jun 23 13:42:39 EDT 2010


Hello
I'm from Brazil.
Can someone give me a website where I can buy an SDIO Wi-Fi for my nanonote?

Or can someone send it to Brazil?

Thank you.

Sérgio


2010/6/18 Michael Peselnik <peselnik at gmail.com>

> Hello guys,
>
> I'm doing some tests with SDIO Wi-Fi card, and it's not working very well.
>
> After a lot of experiments, I simplified my configuration to an Ad-Hoc
> between Ben and my laptop.
> I can see that there is a ~50 % packet loss, seen very clear with ping:
>
> ben:~# ping 192.168.200.1
> PING 192.168.200.1 (192.168.200.1): 56 data bytes
> 64 bytes from 192.168.200.1: seq=1 ttl=64 time=130.918 ms
> 64 bytes from 192.168.200.1: seq=3 ttl=64 time=128.188 ms
> 64 bytes from 192.168.200.1: seq=6 ttl=64 time=128.196 ms
> 64 bytes from 192.168.200.1: seq=8 ttl=64 time=128.203 ms
> 64 bytes from 192.168.200.1: seq=10 ttl=64 time=128.180 ms
> 64 bytes from 192.168.200.1: seq=11 ttl=64 time=132.461 ms
> 64 bytes from 192.168.200.1: seq=12 ttl=64 time=130.046 ms
> 64 bytes from 192.168.200.1: seq=13 ttl=64 time=128.185 ms
> 64 bytes from 192.168.200.1: seq=15 ttl=64 time=1165.486 ms
> 64 bytes from 192.168.200.1: seq=17 ttl=64 time=130.188 ms
> 64 bytes from 192.168.200.1: seq=19 ttl=64 time=128.205 ms
> 64 bytes from 192.168.200.1: seq=21 ttl=64 time=128.216 ms
> 64 bytes from 192.168.200.1: seq=23 ttl=64 time=128.168 ms
> ^C
> --- 192.168.200.1 ping statistics ---
> 24 packets transmitted, 13 packets received, 45% packet loss
> round-trip min/avg/max = 128.168/208.818/1165.486 ms
>
> This is a bunch of messages appearing in dmesg all the time:
> [ 2019.280000] jz4740-mmc jz4740-mmc.0: Sparse irq: 80
> [ 2019.290000]
> /home/user/build/openwrt-xburst/build_dir/linux-xburst_qi_lb60/ks7010/ks7010_sdio.c:ks_sdio_interrupt[639]
> [ 2019.300000]
> /home/user/build/openwrt-xburst/build_dir/linux-xburst_qi_lb60/ks7010/ks7010_sdio.c:ks_sdio_interrupt[639]
> [ 2019.310000]
> /home/user/build/openwrt-xburst/build_dir/linux-xburst_qi_lb60/ks7010/ks7010_sdio.c:ks_sdio_interrupt[647]
> [ 2019.320000]
> /home/user/build/openwrt-xburst/build_dir/linux-xburst_qi_lb60/ks7010/ks7010_sdio.c:ks_sdio_interrupt[651]
>
> I've been also trying with WPA/WEP/OPEN configurations.
>
> WPA connection always fails, as the 4-way handshake cannot be finished due
> to high packet loss. WEP connection can be usually established, but similar
> to OPEN and Ad-Hoc the packet loss is approximately half of all packets.
>
> I really hope we can come up with some ideas, because i really want to have
> a usable Wi-Fi on my Ben.
>
> _______________________________________________
> discussion mailing list
> discussion at lists.qi-hardware.com
> http://en.qi-hardware.com/mailman/listinfo/discussion
>
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