Rotating detection is very sensitive mako #212

[Alan Pope 🍺🐧🐱 🦄]

On 212 just nudging the device will cause apps (system settings / media player) to rotate slightly and then rotate back again.
On previous images I haven't noticed this. 194 doesn't do it.

It's a bit disconcerting for it to rotate so easily.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: qtubuntu-sensors 0.6+14.04.20140213-0ubuntu1
Uname: Linux 3.4.0-4-mako armv7l
ApportVersion: 2.13.2-0ubuntu5
Architecture: armhf
Date: Fri Feb 28 14:08:20 2014
InstallationDate: Installed on 2014-02-28 (0 days ago)
InstallationMedia: Ubuntu Trusty Tahr (development branch) - armhf (20140228.1)
ProcEnviron:
 TERM=linux
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 SHELL=/bin/bash
SourcePackage: qtubuntu-sensors
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Pat McGowan (pat-mcgowan)]

The angle needs to be increased (we are doing 45, android seems more like 60), and perhaps a time period used to determine its a purposeful rotation (.3 to .5 secs?).

Also a rapid movement or bumping of the phone results in the UI jumping around. Only a full rotation should be used.

[Pat McGowan (pat-mcgowan)]

Ric can you comment on where this needs to be resolved?

[Michał Sawicz (saviq)]

See Thomas's comment on the duplicate bug for more info:

https://bugs.launchpad.net/ubuntu/+source/unity8/+bug/1317243/comments/4

[Selene ToyKeeper (toykeeper)]

Ideally, we could let the user decide how sensitive this should be. Currently, we rotate at about 45 degrees, but it might be a better default to require going to at least 60. For my purposes, I would actually prefer to not rotate until about 105 degrees, so the user would turn it past 90 and then back. But that probably isn't a universal solution, so we could maybe let the user choose whether rotation should be "easy" (60 degrees) or "hard" (105 degrees).

The "hard" rotation mode would make rotation far more explicit, and allow people to read while laying down without having to disable auto-rotation.

Additionally, the comments about using a better lowpass filter sound like a very good idea. Otherwise the screen rotates like crazy while it's getting shaken or vibrated (like while driving a car).

[Selene ToyKeeper (toykeeper)]

In Utopic image 140, this seems to be fixed.

Rotation does not occur until about 70 or 80 degrees toward the direction the screen will rotate to. Going back the other way, the user must tilt to about 80 degrees again. So, there is no point at which it will go back and forth with only a few degrees of motion. Also, shaking the phone no longer causes the screen to spin around.