Me. Again.

So I've got Pinguy 11.10 installed, and I can connect to my Wireless N router with no problem using WPA2.

The problem is after certain amount of time (very short, 5 minutes) it disconnects. Not only that, but the router (DIR-615 running DD-WRT) loses all network connectivity. Gone. Nothing. No WAN IP, no LAN connectivity, no wireless. My only recourse to get everything back is to reboot the router.

As said, this ONLY happens when the laptop (Pinguy 11.10) connects to the wireless network. My phone's Wi-Fi and other devices are fine. If I do not sign into the Wireless network with the laptop, all of my other devices (wireless and wired) are fine.

I have created a hot spot with my phone, and tethered the laptop to it...and it's fine. No disconnects.

The router is running in pure "N" mode, using WPA2. I have not tried changing it to N-G Mixed or anything else.

Using my work's wireless connection, it's also fine. Dual-booting with Windows, it's fine as well.

ANY idea on this?

Anyone? Or am I the only lucky one?

---

OK I'll tell you then!

I've been doing some research. This issue is likely to affect others as well.

There is a bug in the Linux kernel, and those using DD-WRT. The problem with Linux is that it disconnects itself. The problem with the DD-WRT firmware is that it takes down the entire router, and only rebooting the router will bring it back to service.

The workaround until the kernel and DD-WRT devs fix it, is to either force the router into G mode, or force the laptop into G mode.

N mode on Linux with DD-WRT firmware is a no-go for now.

http://www.dd-wrt.com/phpBB2/viewtopic.php?t=140461
https://bugs.launchpad.net/ubuntu/+sourc...bug/871254
http://www.dd-wrt.com/phpBB2/viewtopic.php?t=145535

I expect this will be given a higher priority in both channels since it's a simple DoS attack method.

I can confirm that setting the DD-WRT router to G only mode "solves" the issue. Remains to be seen whether a kernel upgrade or a DD-WRT firmware update will fix the issue.

Sad I can't use "N" though...

I'll mark this as solved, even though it technically isn't. It's not a PinguyOS issue.

(11-12-2011 04:10 PM)Cambo Wrote:  It's not a PinguyOS issue.

Honestly, I like this sentence but never have the courage to say it

Please try installing the latest stable kernel and see if it helps
http://forum.pinguyos.com/Thread-Success...uyOS-11-10

I've actually found a better workaround to this issue, and that is disabling the "N" mode on the Intel Wireless card, defaulting it to G. This is preferred as other devices can still connect to the router in "N" mode. The router is currently using N-G Mixed. At least until a solution is found.

Here's the link.

http://ubuntuforums.org/showthread.php?t=1849013

And here's the code...disabling N.

(12-12-2011 01:44 PM)Cambo Wrote:  I've actually found a better workaround to this issue, and that is disabling the "N" mode on the Intel Wireless card, defaulting it to G. This is preferred as other devices can still connect to the router in "N" mode. The router is currently using N-G Mixed. At least until a solution is found.

Thanks a bunch for this cam. You're not the only one with this issues and I'm surprised there's not more documentation on the problem. The problem is upstream of Ubuntu and I'd recommend getting a hold of the Intel Wireless driver team if at all possible. I've gone through three wireless routers that all have had the same DD-Wrt release on them. My laptop crashed all of them while running Linux.