View Full Version : [ubuntu] Internet runs very slow

June 19th, 2008, 06:08 AM
Hey guys, my internet on my PC running Hardy 8.04 goes extremely slowly. It works, it's just a big pain - I can't watch any videos or download anything just cause it takes so long. I have a wireless USB adapter that works when I plug it in and gets a good connection (it's usually in the 90% range), but still, it goes much too slow. Thanks for your help!

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June 19th, 2008, 06:10 AM
A whole bunch of stuff can affect internet speed. Is the slowness of your connection recent or has it been ongoing? Anything changed on your system?

June 19th, 2008, 06:14 AM
Upgrade from dialup :lolflag: just kidding...i havent even followed that advice myself. :(

Anyways, has anything changed other than your operating system? Can you give us some more details on your internet connection, network setup, and usb wireless card?

June 19th, 2008, 06:48 AM
The adapter is a Linksys WUSB54GC Compact Wireless-G adapter, and my computer is a Dell Dimension 2400. And no, nothing's changed since I installed Ubuntu, and it worked well before.

August 9th, 2008, 02:23 AM
I have the same usb adapter as you and just recently after an update for ubuntu..im not even sure which one..but it was right after i updated that it wouldent let me load videos on veoh or download because it kep stalling and i have good connection all the time..its really irritating

August 9th, 2008, 10:04 PM
Could be a problem with an updated kernel. Try booting into an older kernel in your grub menu, if this works then thats a temporary fix, you can then setup grub to default boot to that entry and wait for a newer kernel to be released. Hope that helps somewhat!

October 7th, 2008, 07:29 AM
I have the exact same problem. Here are the deets. I am using a wireless USB Belkin F5D7050.

Just installed 8.04 and it automatically configured my Wifi and shows me my network. I am able to connect but the wifi is extremely slow. If I connect via Eth to my other computer (Windows xp) using it as a tether I get very fast internet. The trouble shooting steps I have completed are disabling ipv6, installing the windows driver with ndiswrapper, and changing my bit rate to 54mpbs with iwconfig.

I am brand new to Ubuntu/Linux and would really appreciate any help.

"wlan0 IEEE 802.11g ESSID:"don't bother it's slow"
Mode:Managed Frequency:2.437 GHz Access Point: 00:1C:10:BB:4A:DB
Bit Rate=54 Mb/s Tx-Power:20 dBm Sensitivity=-121 dBm
RTS thr=2347 B Fragment thr=2346 B
Power Management:off
Link Quality:59/100 Signal level:-58 dBm Noise level:-96 dBm
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0
Tx excessive retries:0 Invalid misc:0 Missed beacon:0

October 7th, 2008, 08:40 AM
Can you try adding this to your /etc/sysctl.conf.

Before you do so, you might want to backup that file.

sudo cp /etc/sysclt.conf /etc/sysclt.conf.bak

sudo vi /etc/sysctl.conf and append these lines at the end.

net.core.rmem_default = 524288
net.core.rmem_max = 524288
net.core.wmem_default = 524288
net.core.wmem_max = 524288
net.ipv4.tcp_wmem = 4096 87380 524288
net.ipv4.tcp_rmem = 4096 87380 524288
net.ipv4.tcp_mem = 524288 524288 524288
net.ipv4.tcp_rfc1337 = 1
net.ipv4.ip_no_pmtu_disc = 0
net.ipv4.tcp_sack = 1
net.ipv4.tcp_fack = 1
net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_ecn = 0
net.ipv4.route.flush = 1

Save the file and reload sysctl.

sudo sysctl -p