Hi, On 04/25/2014 02:03 AM, Pierre Bourdon wrote: > Hi linux-wireless folks, > > I have been getting some weird network behaviors with my Intel > Wireless 7260 adapter that I cannot explain by anything else than a > driver/firmware bug. I'm out of ideas on how to debug this issue. > > My network configuration is fairly basic: IPv4 over 802.11n, > AP/default gateway is 192.168.0.1, my Intel 7260 STA is 192.168.0.2. > Several AP/gateway hardware and software have been tested and have > shown the same problem. > > On 192.168.0.2 I am constantly running some ICMP pings to 192.168.0.1 > and 8.8.8.8. Randomly, the pings from 192.168.0.2 to 8.8.8.8 start > failing (responses never received) while the pings to 192.168.0.1 > continue to succeed without any trouble. When tcpdumping on the > gateway, I see the pings to 8.8.8.8 being successfully forwarded and > responses being sent back to the STA (so this is not a routing issue > on the gateway - and again, I've tested several combinations of hw/sw > on the gateway). > > Another example: my TCP sessions on the Intel 7260 STA to the internet > will start randomly freezing, but my TCP sessions going through > tunnels on another LAN host (let's say, 192.168.0.3) to the internet > will work fine. > > After 30s-1min30 the problem fixes itself and packets start being > received by the STA again. > > I only see this from the Intel 7260 host and not from any other WLAN > device connected to the AP, which is another strong evidence that the > issue is on the STA side. > > I've shared this with some other people using an Intel 7260 adapter on > Linux and found someone having a similar issue. I'm not sure how > widespread it is and could not find an existing bug report. > > What are the next steps to get useful debugging information out of > this issue? I unfortunately do not have the required hardware to do > monitor-mode sniffing of what's happening at the L2 level. > Thank you very much for this very detailed report. 1) can you try with power save disabled? sudo iw wlan0 set power_save off 2) if 1) helps, can you try https://git.kernel.org/cgit/linux/kernel/git/iwlwifi/iwlwifi-fixes.git/commit/?id=a82dda6cd492b8c88952be6f6527f3656f7ac585. Thanks -- 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
