Dlink DWA-552 with AR922x chip set and ath9k module on Lucid 64 bit with possible work around.
Coming here after bug#562674. I originally thought this was something with Nautilus but I managed to narrow down that my problem is with this card and driver and roughly fits the description of this bug. I have the same problems as the original post but I only noticed a problem after trying to write large amounts of data to remote hosts, such as SMB shares on my NAT. On SMB, the connection at least gives me a timed out error. On other transfers like large file writes via ftp it just hangs indefinitely, like the OS forgot it was doing something. I can surf the net and download large files without issue, I have no need for large file uploads to the general internet so I can't comment on those. I tried everything in the original post including ndiswrapper, which is not really an option on Lucid 64, since the official drivers that are 64 bit do not work. The same problems existed testing with the LiveCD of 11.04. I did not try 10.10. While doing large writes with iftop running, I can watch as the connection drastically slows for no apparent reason. Sometimes it will pick back up and other times it will just die all together. The network manager and iwconfig do not show anything unusual when this happens. There are no errors reported in any of the logs showing that the computer was even aware of a problem. While poking around(for a few weeks), I hit on a work around. The card seems to set the bit rate to 0 kb/s when it sets power management to on. The bit rate is messed up until I turn power management off. After that there are no time outs, but it is still not negotiating a good bit rate so I forced it to use a bit rate that I set for it. I made my solution stick by doing the following: Edited /etc/rc.local to include a line " iwconfig wlan# power off" where # is your device number, Then I set my bit rate with "iwconfig wlan# rate $M" where $ is your target bit rate in whole numbers. The lines should look something like "iwconfig wlan1 rate 54M" The time outs stopped happening after this and the drastic shifts in bit rates seems to have been reduced. I tried using the auto flag for my bit rate, but it didn't seem to work reliably. The only problem I have now is my connection is slower than it should be, possibly related to the same thing causing the drop outs in the first place. I can only seem to get this N card to do G speeds. I hope this helps someone figure out what is going on. If anyone figures out why my rate is limited , please send me a message or point me to a different bug rather than clog up this bug report. (I have N cards and and an N router. This is the only card that negotiates this slow of a rate) -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/622265 Title: ath9k AR922X loses connection -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
