Google has started rolling out the Android 5.1.1 Lollipop update to
Nexus 4, Nexus 5, and Nexus 9 LTE tablet. The rollout has kicked off
almost after a month Google
published
the Android 5.1.1 factory images for the Nexus Player.

According to
the update notification, the Android 5.1.1 Lollipop brings performance
improvements apart from stability and bug fixes. Some users report that
they have started receiving the Android 5.1.1 update notification on the
LG Nexus 4 with build number LMY47V; LG Nexus 5 with LMY48B, and HTC Nexus 9 LTE
with LRX22L.
Considering that Google has just started pushing the
OTA (over-the-air) update to the Nexus 4 and Nexus 5 smartphone
alongside Nexus 9 LTE tablet, users should expect the rollout to take a
few weeks to be completed globally.
Once the Android 5.1.1
Lollipop update is available for your Google Nexus 4, Nexus 5, or Nexus 9
LTE tablet, it will be seen as a system notification. Users can also
manually check for it by going into Settings > About Phone >
System Updates or download the zipped and Google-signed OTA update file
(via Android Police) that has been made available online by users who have already
received the update. David Michie has posted a screenshot of the Android 5.1.1 update notification.
As of now, there is no detailed changelog of
the new incremental update; though Android 5.1.1 is primarily
anticipated to bring a fix for the memory leak issue, a bug that plagued
Android 5.0 Lollipop users and even haunted some users on Android 5.1
Lollipop.
Last month, a developer changelog for Android 5.1.1
source code was spotted with a total of 34 commits. The majority of the
commits were either changes to core OS functions, or for media decoding/
handling and telephony. The biggest appeared to be a fix for a camera
timeout issue on the Nexus 5 and Nexus 6, a fix/ improvement for a
remote pass through feature on Chromecast, apart from fixes for security
issues.
Google last month initially published the factory images
for the Nexus Player, the firm's streaming set-top box. In the same
period, the Android Open Source Project (AOSP) was also updated with the
Android 5.1.1 source code (build LMY47V).