Best I can do is assume this is an issue with the kernel driver; though
I can't reproduce it (with the same driver, not the same device):
Sep 14 20:28:26 vipul-Rev-1-0 NetworkManager[1422]: <info> (wlan0): device
state change: activated -> unavailable (reason 'none') [100 20 0]
Sep 14 20:28:26 vipul-Rev-1-0 NetworkManager[1422]: <info> (wlan0):
deactivating device (reason: 0).
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.534621] iwlagn 0000:03:00.0:
RF_KILL bit toggled to disable radio.
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536265] iwlagn 0000:03:00.0: Not
sending command - RF KILL
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536280] iwlagn 0000:03:00.0: Error
sending REPLY_TX_LINK_QUALITY_CMD: enqueue_hcmd failed: -5
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536295] iwlagn 0000:03:00.0: Not
sending command - RF KILL
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536305] iwlagn 0000:03:00.0: Error
sending REPLY_ADD_STA: enqueue_hcmd failed: -5
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536313] HW problem - can not stop
rx aggregation for tid 0
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536349] iwlagn 0000:03:00.0: Not
sending command - RF KILL
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536358] iwlagn 0000:03:00.0: Error
sending REPLY_ADD_STA: enqueue_hcmd failed: -5
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536366] HW problem - can not stop
rx aggregation for tid 1
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536392] iwlagn 0000:03:00.0: Not
sending command - RF KILL
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536400] iwlagn 0000:03:00.0: Error
sending REPLY_QOS_PARAM: enqueue_hcmd failed: -5
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536409] iwlagn 0000:03:00.0:
Failed to update QoS
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536421] iwlagn 0000:03:00.0: Not
sending command - RF KILL
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536429] iwlagn 0000:03:00.0: Error
sending REPLY_RXON: enqueue_hcmd failed: -5
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536438] iwlagn 0000:03:00.0: Error
clearing ASSOC_MSK on BSS (-5)
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536658] iwlagn 0000:03:00.0: Not
sending command - RF KILL
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536667] iwlagn 0000:03:00.0: Error
sending REPLY_RXON: enqueue_hcmd failed: -5
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536675] iwlagn 0000:03:00.0: Error
clearing ASSOC_MSK on BSS (-5)
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536685] iwlagn 0000:03:00.0: Not
sending command - RF KILL
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536693] iwlagn 0000:03:00.0: Error
sending REPLY_RXON: enqueue_hcmd failed: -5
Sep 14 20:28:26 vipul-Rev-1-0 kernel: [ 234.536721] iwlagn 0000:03:00.0: Error
clearing ASSOC_MSK on BSS (-5)
Reassigning to 'linux'.
** Package changed: network-manager (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: Incomplete => New
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https://bugs.launchpad.net/bugs/850544
Title:
Internet stops working when connected through wifi
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