I'm affected as well. I narrowed the problem down to TCP connections. Indeed two (or more) TCP connections each get 15-20kB/s in the Sonera mobile network, but no more. UDP on the other hand apparently flows without problems, so somehow Sonera hardware/software manages to slow down all TCP connections.
I found out that: echo 0 | sudo tee /proc/sys/net/ipv4/tcp_window_scaling ...ie. disabling TCP window scaling removes the problem with possible side-effects (nothing that severe compared to the benefits so far it seems, though). Another person I helped taking that into use reported that speedtest results rose from ca. 140kbps to 1,3Mbps. I can myself only test that indeed I'm now getting full 384kbit/s my subscription allows. No other operators are affected, but somehow Sonera's hw/sw in its mobile network is intolerably incompatible with Linux at the moment. I'm not sure if Linux could do some detection or something better when it comes to TCP window scaling in that environment. -- 3G download speed is very slow compared to Hardy on elderly PIII computers or Microsoft Windows OSs https://bugs.launchpad.net/bugs/525049 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
