Ubuntu – After installing Ubuntu 20.04 the wifi card Ralink RT3090 does not see any wifi networks

20.04ralinkwireless

been having the problem above on two computers, one fixed itself somehow after a few days (it was connected to ethernet so maybe an update fixed it???) The other had Ubuntu 20.04 installed a few days ago and again it seems to see the wifi card ok but the card cannot see my home wifi network or any others that it could see previously. I have found some very old threads mentioning this card from many years ago and didn't want to mess with anything incase it made matters worse.
Could anyone explain how I can track down this issue / fix this issue? The ethernet works ok on this.
The other thing that just came to mind was when I installed Ubuntu on these two computers, during the installation it also didn't see any wifi networks and I had to install by selecting the ethernet for the downloads of updates.
Computer is an HP G5370UK

WiFi card info:

Network Controller: Ralink corp. RT3090 Wireless 802.11n 1T/1R PCIe

Thanks for any help
Simon

Best Answer

Found the answer in this thread. Seems the kernel module for this WiFi chipset is available but not loaded in Ubuntu 20.04. Load it and set it to load on boot using these commands:

echo "options rt2800pci  nohwcrypt=1" | sudo tee /etc/modprobe.d/rt2800pci.conf
sudo modprobe -rfv rt2800pci
sudo modprobe -v rt2800pci

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Ubuntu – Ralink 5390 card in laptop does not work after installing driver

The source code for the RT5390 driver is currently being managed through the Suse repositories, the link is here.

Ubuntuforums.org has instructions to compile the source code for Natty. I've reproduced the instructions here to complete the answer.

You'll see 64-bit (x86_64) and 32-bit (i586) packages listed. Download the openSUSE driver package - the source RPM, not the binary package: rt5390sta-2.4.0.4-6.2.src.rpm

Open your web browser's download directory and double-click the src RPM. Extract all files into a new directory named openSUSE_rt5390sta_driver

Open a terminal and sudo to root:

sudo su -
cd openSUSE_rt5390sta_driver
tar jxvf 2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO.tar.bz2
cd 2010_1216_RT5390_LinuxSTA_V2.4.0.4_WiFiBTCombo_DPO/
patch -p0 < ../rt5390sta-2.4.0.4-config.patch
patch -p0 < ../rt5390sta-2.4.0.4-WPA-mixed.patch
patch -p0 < ../rt5390sta-2.4.0.4-convert-devicename-to-wlanX.patch
patch -p0 < ../rt5390sta-2.4.0.4-remove-potential-conflicts-with-rt2860sta.patch 
patch -p0 < ../rt5390sta-2.4.0.4-return_nonvoid_function.patch
patch -p0 < ../rt5390sta-2.4.0.4-reduce_debug_output.patch
mv RT2860STA.dat RT5390STA.dat
vi os/linux/config.mk

Change HAS_ANTENNA_DIVERSITY_SUPPORT to: HAS_ANTENNA_DIVERSITY_SUPPORT=y

make
mkdir -p /etc/Wireless/RT5390STA
cp  RT5390STA.dat /etc/Wireless/RT5390STA/
cp -i os/linux/rt5390sta.ko /lib/modules/`uname -r`/kernel/drivers/net/wireless/
echo rt5390sta >> /etc/modules
echo "blacklist rt2800pci" >> /etc/modprobe.d/blacklist.conf
depmod -a

Best Answer

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Ubuntu – Ralink 5390 card in laptop does not work after installing driver

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