unlock_greeter uses retries to work around unlocking failures under heavy load

[Michał Sawicz]

The unlock_greeter helper uses retries to work around potential issues when unlocking the greeter under heavy load (e.g. on startup).

The gesture being recognized needs to be relatively smooth for it to be accepted, and heavy load sometimes results in input not being delivered in a timely manner, resulting in the gesture being rejected.

We should look at potentially improving that situation - especially when having split the greeter out from the shell.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity8 7.84+14.04.20131206.1-0ubuntu1
Uname: Linux 3.0.0-3-maguro armv7l
ApportVersion: 2.12.7-0ubuntu2
Architecture: armhf
Date: Wed Dec 11 23:10:02 2013
InstallationDate: Installed on 2013-12-11 (0 days ago)
InstallationMedia: Ubuntu Trusty Tahr (development branch) - armhf (20131211.1)
SourcePackage: unity8
UpgradeStatus: No upgrade log present (probably fresh install)

[Alberto Salvia Novella (es20490446e)]

It's a usability issue that doesn't limit the functionality of a core package.