Suddenly my system blue-tooth window disappears from task bar & after opening setting, even though I set the Bluetooth to ON it shows Bluetooth is disabled. Here how it looks enter image description here

My system configuration uname -a is

Linux lte 4.4.0-119-generic #143~14.04.1-Ubuntu SMP Mon Apr 2 18:05:22 UTC 2018 i686 i686 i686 GNU/Linux

here is the last few lines related to bluetooth of dmesg are

[   25.939848] usb 2-1.4: Product: Bluetooth USB Host Controller
[   25.939854] usb 2-1.4: Manufacturer: Atheros Communications
[   25.939860] usb 2-1.4: SerialNumber: Alaska Day 2006
[   28.005621] Bluetooth: hci0 command 0x0c25 tx timeout
[   30.009628] Bluetooth: hci0 command 0x0c38 tx timeout
[   32.013659] Bluetooth: hci0 command 0x0c39 tx timeout
[   32.175710] ACPI Error: Field [B128] at 1152 exceeds Buffer [NULL] size 160 (bits) (20150930/dsopcode-236)
[   32.175721] ACPI Error: Method parse/execution failed [\_SB.WMID.HWCD] (Node f449f0d8), AE_AML_BUFFER_LIMIT (20150930/psparse-542)
[   32.175734] ACPI Error: Method parse/execution failed [\_SB.WMID.WMAD] (Node f449f600), AE_AML_BUFFER_LIMIT (20150930/psparse-542)
[   34.017688] Bluetooth: hci0 command 0x0c05 tx timeout
[   36.021704] Bluetooth: hci0 command tx timeout

How to solve it either manually or through terminal. Any help is appreciated.

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