Ubuntu: unstable wifi on Lenovo z50-70 (Ubuntu 15.04)



Question:

I am using Ubuntu 15.04 on Lenovo Z50-70. My wifi is unstable, it gets disconnect again and again and asks for password.

NOTE: the password I input is correct and other users on windows dont have any problem with wifi.

output of sudo lshw -C network:

  *-network                    description: Ethernet interface     product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller     vendor: Realtek Semiconductor Co., Ltd.     physical id: 0     bus info: pci@0000:01:00.0     logical name: eth0     version: 10     serial: 68:f7:28:74:fd:06     size: 100Mbit/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=full firmware=rtl8168g-3_0.0.1 04/23/13 ip=192.168.2.6 latency=0 link=yes multicast=yes port=MII speed=100Mbit/s     resources: irq:45 ioport:4000(size=256) memory:c3504000-c3504fff memory:c3500000-c3503fff    *-network DISABLED     description: Wireless interface     product: QCA9565 / AR9565 Wireless Network Adapter     vendor: Qualcomm Atheros     physical id: 0     bus info: pci@0000:02:00.0     logical name: wlan0     version: 01     serial: 5c:93:a2:a3:59:55     width: 64 bits     clock: 33MHz     capabilities: pm msi pciexpress bus_master cap_list rom ethernet physical wireless     configuration: broadcast=yes driver=ath9k driverversion=4.0.7-040007-generic firmware=N/A latency=0 link=no multicast=yes wireless=IEEE 802.11bgn     resources: irq:19 memory:c3400000-c347ffff memory:c3480000-c348ffff  

output of rfkill list:

0: phy0: Wireless LAN  Soft blocked: yes  Hard blocked: no  1: ideapad_wlan: Wireless LAN  Soft blocked: yes  Hard blocked: no  2: ideapad_bluetooth: Bluetooth  Soft blocked: no  Hard blocked: no  7: hci0: Bluetooth  Soft blocked: yes  Hard blocked: no  

output of lspci -nn | grep Net

02:00.0 Network controller [0280]: Qualcomm Atheros QCA9565 / AR9565 Wireless Network Adapter [168c:0036] (rev 01)  


Solution:1

I would try this. Run in terminal

sudo tee /etc/modprobe.d/ath9k.conf <<< "options ath9k nohwcrypt=1"  

and reboot.


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