My main computer has a D-Link G510 PCI wireless adapter in it - which is rt61pci. The problem with it is that it will occasionally slow right down, often taking network operations to a standstill. Apt-get would quite often say a number of tens of kB per second, then hundreds of bytes and then nothing, for a considerable amount of time. Browsing the Internet often becomes a pain (where pages would not load at all for a few minutes), but I know this is not a connectivity problem, as all the other computers would get proper speed. Even when they're not using it, I am able to receive pages on my laptop at full speed (ipw3945) but not on my desktop, at unpredictable times. I think this may be a module issue. I have been having this problem since Ubuntu Jaunty (and I think Intrepid), possibly earlier. Has the specific module codebase changed at all in this time? I doubt it is a network stack problem or a wireless coverage problem, as it works on all other computers with an identical software configuration, and I get a consistent at least 70% signal strength. Any suggestions? Cheers Dan
I think flood pinging the router has helped a little, it helps kickstart downloads again. and helps pages load faster when the connection grinds to a halt. Any idea what this could be? Speedguide results if that helps: TCP options string: 020405b4 MSS: 1460 MTU: 1500 TCP Window: 5840 (multiple of MSS) RWIN Scaling: 0 bits (Under many Linux distributions, the Analyzer only shows the Current TCP Window.) Unscaled RWIN : 5840 Recommended RWINs: 64240, 128480, 256960, 513920, 1027840 BDP limit (200ms): 234kbps (29KBytes/s) BDP limit (500ms): 93kbps (12KBytes/s) MTU Discovery: ON TTL: 43 Timestamps: OFF SACKs: OFF IP ToS: 00000000 (0)
Could you try disabling powersaving: iwconfig wlan0 power off
It's off now, but it has behaved all day. Especially, it seems, on the Ubuntu Live CD. Does that have powersaving turned off by default?
The powersaving trick doesn't work - it still behaves slow and erratically - today has been particularly bad for it. Doing ping -f [router] detects many many dropped packets while it is having problems, and next to none when it's not. In fact I'm having to use my laptop to even get onto this site. Any more hints?
Dan, does this problem persist w/ 2.6.33? Ivo & Gertjan, any further advice?
I can't be sure as the computer is moving on now. Anyone else know?
Yes this problem persists in 2.6.33. Confirmed in PCLinuxOS and Archlinux. It seems the problem is massive packet loss. Testing at www.pingtest.net and ping on PCLinuxOS averages a packet loss of 30-40%. Testing with Archlinux using ping shows around the same loss averages (30-40%).
Ivo & Gertjan, is there som info fastaire3 can collect to make this report useful?
Sorry at the moment I don't have ideas on where the problem might come from. I can look into this further when I completed the rt2800usb project though.
I'm not seeing any other reports like this...closing due to staleness...