Никакой Wi-Fi на человечности 14.04 в Inspiron 15 5570

Я использую ноутбук Dell Inspiron 15 5570. У меня есть Windows 10 и Ubuntu 14.04 LTS (двойная ОС). Wi-Fi включает опцию, не перечислен при нажатии на значок Wifi. В Windows 10 хорошо работает Wi-Fi.

Сетевой контроллер: Устройство Atheros Qualcomm [168c:0042] (газуют 31).

Результат команды dmesg | grep ath:

[   19.878601] ath10k_pci 0000:03:00.0: enabling device (0000 -> 0002)
[   19.879412] ath10k_pci 0000:03:00.0: pci irq msi-x interrupts 8 irq_mode 0 reset_mode 0
[   20.122393] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/cal-pci-0000:03:00.0.bin failed with error -2
[   20.122400] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/QCA9377/hw1.0/firmware-5.bin failed with error -2
[   20.122402] ath10k_pci 0000:03:00.0: could not fetch firmware file 'ath10k/QCA9377/hw1.0/firmware-5.bin': -2
[   20.122405] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/QCA9377/hw1.0/firmware-4.bin failed with error -2
[   20.122406] ath10k_pci 0000:03:00.0: could not fetch firmware file 'ath10k/QCA9377/hw1.0/firmware-4.bin': -2
[   20.122409] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/QCA9377/hw1.0/firmware-3.bin failed with error -2
[   20.122410] ath10k_pci 0000:03:00.0: could not fetch firmware file 'ath10k/QCA9377/hw1.0/firmware-3.bin': -2
[   20.122413] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/QCA9377/hw1.0/firmware-2.bin failed with error -2
[   20.122414] ath10k_pci 0000:03:00.0: could not fetch firmware file 'ath10k/QCA9377/hw1.0/firmware-2.bin': -2
[   20.122417] ath10k_pci 0000:03:00.0: Direct firmware load for ath10k/QCA9377/hw1.0/firmware.bin failed with error -2
[   20.122418] ath10k_pci 0000:03:00.0: could not fetch firmware (-2)
[   20.122419] ath10k_pci 0000:03:00.0: could not fetch firmware files (-2)
[   20.122420] ath10k_pci 0000:03:00.0: could not probe fw (-2)
[   35.594654] audit: type=1400 audit(1516343943.478:16): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/telepathy/mission-control-5" pid=927 comm="apparmor_parser"
[   35.594657] audit: type=1400 audit(1516343943.478:17): apparmor="STATUS" operation="profile_load" profile="unconfined" name="/usr/lib/telepathy/telepathy-*" pid=927 comm="apparmor_parser"

Результат команды sudo dpkg -s linux-firmware | grep Version: Version: 1.127.24

Какая-либо справка?