WiFi connection speed drops dramatically in Zorin 7

Folks, strange situation.

New Lenovo G575 notebook

Clean installation of Zorin 7, parallel to clean Windows 7.

(Customer wants both... )

Windows wifi connection works fine.

In Zorin computer connects with 6 mb/s, in some 10 min drops to .20 mb/s.

Runnin Live CD 6,1 computer holds 6 mb/s connection.

Attached test resutls in Z7 and Z6,1

I wander if it a software glitch other can experience too...

Any observations?

http://www.speedtest.net/my-result/2822044587 login from Zorin 7

http://www.speedtest.net/my-result/2822287210 login from Zorin 6,1

http://www.speedtest.net/my-result/2822461225 Windows 7

In attachment result of the command:

sudo apt-get update; sudo apt-get install hwinfo grep rfkill; sudo lshw -C network; rfkill list; sudo iwlist scan | egrep -i 'chan|ssid'; cat /etc/network/interfaces; cat /etc/lsb-release; lspci -nnk | grep -iA2 net; lsusb; nmcli nm status; sudo lshw -short; uname -a; dmesg | egrep '02:00|80211|acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|ireless|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|ound|p54|prism|rror|rtl|rt2|rt3|rt5|rt6|rt7|usb|witch|wl';sudo dmidecode|egrep 'anufact|roduct|erial|elease'; iwconfig; cat /etc/modprobe.d/* | egrep '80211|acx|at76|ath|b43|bcm|brcm|CX|eth|ipw|irmware|isl|lbtf|orinoco|ndiswrapper|NPE|p54|prism|rtl|rt2|rt3|rt6|rt7|wmi|witch|wl'; cat /var/lib/NetworkManager/NetworkManager.state; sudo hwinfo --netcard ; ps -aux|egrep 'wpa|icd|etwork'; netstat -rn ; cat /etc/resolv.conf; ls -lia /boot; sudo lsmod

for both Z7 and Z6,1

Thank you!

Your card is RT3090 with ID 1814:3090. This is an acer card on a Levono Laptop.
Try this.
Open terminal (ctrl+alt+T) and give the following commands, the one after the other, hiting <enter> after each one.

Code:

sudo su
echo "blacklist acer-wmi" >> /etc/modprobe.d/blacklist.conf
exit

Restart and see if you got any better results.

Hi,

further to MV's suggestion, you should also fully update your system:

viewtopic.php?f=5&t=2247

Regards Wolfman

madvinegar wrote:Your card is RT3090 with ID 1814:3090. This is an acer card on a Levono Laptop.
Try this.
Open terminal (ctrl+alt+T) and give the following commands, the one after the other, hiting <enter> after each one.

Code:

sudo su
echo "blacklist acer-wmi" >> /etc/modprobe.d/blacklist.conf
exit

Restart and see if you got any better results.

Thank you, done as suggested.

does not help.

6mb/s lasts for some 3 minutes, than drops to .24

Wolfman wrote:Hi,

further to MV's suggestion, you should also fully update your system:

http://www.zoringroup.com/forum/viewtop ... f=5&t=2247

Regards Wolfman

Great suggestion, I do it all the time.

Does not help.

Will install 6,1 side-by side, to see if it is Drivers conflict in Z 7

http://www.speedtest.net/my-result/2823717010

Hi,

this could be down to the "MTU":

http://en.wikipedia.org/wiki/Maximum_transmission_unit

What make is your router?.

Regards Wolfman

Could you please post the outcome of

Code:

lsmod

I want to see if there are any other modules that are conflicting with your rt2800pci.

Also, I found this very useful link that may solve your problems.
http://www.tech-juice.org/2011/10/02/fi ... -on-linux/

Wolfman wrote:Hi,

this could be down to the "MTU":

http://en.wikipedia.org/wiki/Maximum_transmission_unit

What make is your router?.

Regards Wolfman

Thank you for helping. The router is 360HGV 2WIRE ATT

Trying this for built-in adapter

http://www.techytalk.info/ralink-rt3090 ... river-ppa/

Let us know if the PPA worked!

Hi,

did you take a look in the "Additional Drivers List" in System Settings to see if it offers you any other drivers?:

System Settings > Hardware > Additional Drivers

Regards Wolfman

Ralink is not included in the additional drivers. I think only broadcom is. (as regards wireless card drivers).