Ubuntu: Wifi disconnecting frequently (16.04 - Ralink RT5392)



Question:

I have installed Ubuntu 16.04 on my computer. Everything works fine except the wifi which disconnects frequently (5-10 times per day): each time I have to disable wifi and enable it to make it works again.

There are other users of the same wifi network who are on different computers and OS (Mac, windows), and they have no problems.

Is there a way to fix the problem?

I have run the wireless info script, the result is here: http://paste.ubuntu.com/17635377/

Here is the output of lspci -knn | grep Net -A2:

    05:00.0 Network controller [0280]: Ralink corp. RT5392 PCIe Wireless  Network Adapter [1814:5392]      Subsystem: Ralink corp. RT5392 PCIe Wireless Network Adapter [1814:f053]      Kernel driver in use: rt2800pci      Kernel modules: rt2800pci  

And the output of sudo lshw -C network:

    *-network                    description: Wireless interface     product: RT5392 PCIe Wireless Network Adapter     vendor: Ralink corp.     physical id: 0     bus info: pci@0000:05:00.0     logical name: wlp5s0     version: 00     serial: 74:de:2b:39:5f:52     width: 32 bits     clock: 33MHz     capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless     configuration: broadcast=yes driver=rt2800pci driverversion=4.4.0-24-generic firmware=0.34 ip=192.168.0.108 latency=0 link=yes multicast=yes wireless=IEEE 802.11bgn     resources: irq:19 memory:fb100000-fb10ffff     *-network     description: Ethernet interface     product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller     vendor: Realtek Semiconductor Co., Ltd.     physical id: 0     bus info: pci@0000:06:00.0     logical name: enp6s0     version: 06     serial: 38:60:77:9f:a6:fa     size: 10Mbit/s     capacity: 1Gbit/s     width: 64 bits     clock: 33MHz     capabilities: pm msi pciexpress msix vpd bus_master cap_list ethernet physical tp mii 10bt 10bt-fd 100bt 100bt-fd 1000bt 1000bt-fd autonegotiation     configuration: autonegotiation=on broadcast=yes driver=r8169 driverversion=2.3LK-NAPI duplex=half firmware=rtl_nic/rtl8168e-2.fw latency=0 link=no multicast=yes port=MII speed=10Mbit/s     resources: irq:25 ioport:d000(size=256) memory:da104000-da104fff memory:da100000-da103fff  


Solution:1

I ran into similar problems after a recent update to 16.04 with a Ralink corp. RT2561/RT61.

For me the solution was to edit default-wifi-powersave-on.conf with

sudo gedit /etc/NetworkManager/conf.d/default-wifi-powersave-on.conf

and change wifi.powersave = 3 to wifi.powersave = 0

I've had no issues since. Perhaps this will work as well for you as it did for me.

Source: https://ubuntuforums.org/showthread.php?t=2333291


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