Take the 2-minute tour ×
Ask Ubuntu is a question and answer site for Ubuntu users and developers. It's 100% free, no registration required.

I just installed 12.04LTS and the wifi became extremely slow. When I booted back to windows the wifi became normal again. This happened the first time when I upgraded 10.10 to 11.04, so I stopped using Ubuntu for a year, hoping this will be solved by 12.04. Of course it didn't, so I googled for the fix but nothing seems to work.

I've already tried the three methods in this site:

Oh, I forgot to say that the internet was normal when I connected it to wired. But, I'm still having issues with my Wifi.

Hardware Specs
My computer model is Asus M70Sa and the wifi card is 802.11abgn+BT

Here is the whole list of them when I typed "sudo lspci -nn" into Konsloe:

00:00.0 Host bridge [0600]: Intel Corporation Mobile PM965/GM965/GL960 Memory Controller Hub [8086:2a00] (rev 03)
00:01.0 PCI bridge [0604]: Intel Corporation Mobile PM965/GM965/GL960 PCI Express Root Port [8086:2a01] (rev 03)
00:1a.0 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #4 [8086:2834] (rev 03)
00:1a.1 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #5 [8086:2835] (rev 03)
00:1a.7 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #2 [8086:283a] (rev 03)
00:1b.0 Audio device [0403]: Intel Corporation 82801H (ICH8 Family) HD Audio Controller [8086:284b] (rev 03)
00:1c.0 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 1 [8086:283f] (rev 03)
00:1c.2 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 3 [8086:2843] (rev 03)
00:1c.3 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 4 [8086:2845] (rev 03)
00:1c.4 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 5 [8086:2847] (rev 03)
00:1c.5 PCI bridge [0604]: Intel Corporation 82801H (ICH8 Family) PCI Express Port 6 [8086:2849] (rev 03)
00:1d.0 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #1 [8086:2830] (rev 03)
00:1d.1 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #2 [8086:2831] (rev 03)
00:1d.2 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB UHCI Controller #3 [8086:2832] (rev 03)
00:1d.7 USB controller [0c03]: Intel Corporation 82801H (ICH8 Family) USB2 EHCI Controller #1 [8086:2836] (rev 03)
00:1e.0 PCI bridge [0604]: Intel Corporation 82801 Mobile PCI Bridge [8086:2448] (rev f3)
00:1f.0 ISA bridge [0601]: Intel Corporation 82801HM (ICH8M) LPC Interface Controller [8086:2815] (rev 03)
00:1f.1 IDE interface [0101]: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) IDE Controller [8086:2850] (rev 03)
00:1f.2 SATA controller [0106]: Intel Corporation 82801HM/HEM (ICH8M/ICH8M-E) SATA Controller [AHCI mode] [8086:2829] (rev 03)
01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI RV635 [Mobility Radeon HD 3650] [1002:9591]
01:00.1 Audio device [0403]: Advanced Micro Devices [AMD] nee ATI RV635 HDMI Audio [Radeon HD 3600 Series] [1002:aa20]
02:00.0 Ethernet controller [0200]: Marvell Technology Group Ltd. 88E8055 PCI-E Gigabit Ethernet Controller [11ab:4363] (rev 13)
06:00.0 SATA controller [0106]: JMicron Technology Corp. JMB360 AHCI Controller [197b:2360] (rev 02)
07:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 4965 AG or AGN [Kedron] Network Connection [8086:4229] (rev 61)
08:01.0 FireWire (IEEE 1394) [0c00]: Ricoh Co Ltd R5C832 IEEE 1394 Controller [1180:0832] (rev 05)
08:01.1 SD Host controller [0805]: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter [1180:0822] (rev 22)
08:01.2 System peripheral [0880]: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter [1180:0592] (rev 12)
08:01.3 System peripheral [0880]: Ricoh Co Ltd xD-Picture Card Controller [1180:0852] (rev 12)

Update: May 12, 2012
I just installed the madwifi-0.9.4-current driver for my Atheros card, but after I rebooted, nothing appears to have been changed. Also I have no idea how to configure the Atheros card, or even if it was installed or not.

Update: May 13, 2012
I just tried another solution in form: Why is my internet so slow with an Atheros wireless card?
It did speed up by connection just by a little bit, but I was still getting less than 15% of my normal connection speed.

Update: May 17, 2012
Does anyone know why is causing this problem? Because, form what I've heard, other distros aren't having this issue (except Linux Mint, but it is based on Ubuntu).

  • Could it be driver problem?
  • Or some kind of incompatibility between the Ubuntu 12.04 and the driver?
  • Or the driver support is outdated?
  • Other possibilities?

Part 2
Ok, so I went to the library and the wifi became normal.

  • Could it be a router problem/incompatibility?
  • Internet provider? I doubt it, because using Wifi on Windows was normal.

Update: May 18, 2012
I do not know what happened, but somehow my wifi is fixed. Does it have anything to do with the update just few hours ago?
Well...It did work for a bit, but returned to the unbearably-laggy-wifi about after 45mins.

share|improve this question
add comment

5 Answers

I do not know if this will work for you, but you may try and switch off power management for your wireless (it has helped others apparently). Open a terminal and type the following:

sudo iwconfig wlan0 power off  

Hit Enter. This is assuming that your wireless is labeled as wlan0. To check, in an open terminal simply type:

iwconfig  

It should list three things such as lo, wlan0 and eth0 although they may be labeled differently. Also, it would help if you could type in:

lspci  

This will allow us to ascertain what wireless chip you are using. If by switching off the power management works, then to make it permanent follow the instructions given by sagarchalise here:

How can I prevent iwconfig power management from being turned on?

share|improve this answer
add comment

I just installed 12.04LTS too. I have a HP Pavilion dv7. First solution on www.unixmen.com/resolve-slow-connexion-when-using-wifi-in-ubuntu-1104-natty-narwhal/ worked.

Note: The file didn't exist but in the empty file I typed what was asked.

Restarting the system did the job. I now have again 50Mb/s download on my ISP connection which is what I pay for.

Hope this helps...

share|improve this answer
    
Nice, however, the first solution has nothing to do with Intel wireless. :~) –  mikewhatever Jan 26 '13 at 3:21
add comment

Same problem here, Sony Vaio VFN-FZ31E with Intel 4965 wifi card. I tried different methods but only got results compiling an old kernel.

I used 2.6.32.27, the last kernel for 10.04: http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.32.27.tar.bz2

Follow this instructions to compile: http://mitchtech.net/compile-linux-kernel-on-ubuntu-12-04-lts-detailed/

If you get gcc: error: elf_i386: No such file or directory, error you should make a change in the kernel source, in arch/x86/vdso/Makefile as follows:

replace -m elf_x86_64 with -m64 on the line starting with VDSO_LDFLAGS_vdso.lds
replace -m elf_x86 with -m32 on the line starting with VDSO_LDFLAGS_vdso32.lds

Don't forget to select this kernel in grub at startup.

share|improve this answer
add comment

If you have the proprietary Broadcom drivers installed it might be the problem. Once I removed the proprietary driver I got my regular slow DSL back!

share|improve this answer
add comment

First connect to the internet via your wired internet cable.

Then go to http://madwifi-project.org/ to install the Atheros Drivers.

share|improve this answer
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.