GNOME Bugzilla – Bug 595066
NetworkManager manages to connect to 5GHZ N band router but fails to send or receive packets
Last modified: 2009-11-29 20:59:09 UTC
Created attachment 143100 [details] Network Manager running in debug mode connecting to 5Ghz N band network Sony Vaio laptop VGN-TZ31WN Wireless Router: linksys WRT610N laptop wireless chipset: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection (rev 61) OS: Fedora Core 11 fully updated as of today Sunday 13th September 2009 I have a 5GHZ N band network in my home and when I try and connect to it, the conneciton takes a significant amount of time. However, when connected, no sites are browsable. Also the connection speed is listed as 60Mbps, which drops to 34Mbps a few seconds later. The system is dual booting, and booting to WinXP allows the laptop to connect to the 5GHZ N band network with a connection speed of 300Mbps. A "Mac Book Air" also connects to the N band router and packets freely. I include the NetworkManager debug trace, as well as two packet captures. One where I attempt to connect to http://www.google.co.uk on the N band network, and another when I attempt to connect on the abg network.
Created attachment 143101 [details] Wireshark packet capture of failure to connect to www.google.co.uk
Created attachment 143102 [details] Wireshark packet capture of connection to www.google.co.uk working on the ABG network
Hmm, sounds more like driver problems; there are still some issues with 802.11n support in the kernel at this time. Not all the features are supported (like wide channels) and it may be hit-or-miss. What *specific* kernel version are you using, and are the iwlagn drivers the ones that came with that kernel, or did you rebuild them from elsewhere? uname -a from a terminal will tell you the specific kernel name. Thanks!
Hi, Thanks for the reply. I have found that changing the encryption to TKIP has got the connection up and running but it still only connects @ G speeds. The uname -a displays: [root@localhost ~]# uname -a Linux localhost.localdomain 2.6.30.5-43.fc11.i686.PAE #1 SMP Thu Aug 27 21:34:36 EDT 2009 i686 i686 i386 GNU/Linux I have used vanilla kernel drivers. I also include an rpm -qa to show all packages that I have. I have the channel set to automatic for wide (20/40) on the router.
Created attachment 143184 [details] Package list (rpm -qa)
Yeah; invalid connections don't get cleared for wired devices on cable plug/unplug, which should really happen; that's getting fixed soon for 0.8 and we may be able to backport to 0.7.x. Also, we should be retrying failed DHCP connections periodically which is also work-in-progress. *** This bug has been marked as a duplicate of bug 511581 ***
Sorry, wrong bug, reopening...
I've had similar problems, Intel 5300 here though. Forcing channel settings on the Linksys helped, but now with 2.6.31 it's happy with wide + auto etc. too. Both (forcing channels and trying 2.6.31) are worth a shot, I suppose, unfortunately rawhide kernels probably won't trivially go into F11 due to the new initrd things :(
2.6.31 does indeed seem to fix it. Running it fine on FC12