Here are testing steps
0. Link machine with external monitor via D-sub
1. Clean install oneiric
2. sudo apt-get update;sudo apt-get dist-upgrade
3. reboot and testing Fn+F3 and the behaviour is
mirror mode -> mirror mode -> internal only -> external only
4. sudo apt-add-repository ppa:ayan/gnome-settings-daemon
5. sudo apt-get update;sudo apt-get dist-upgrade
3 packages update: gnome-desktop3-data gnome-settings-daemon
libgnome-desktop-3-2
the version is 3.2.1-0ubuntu1.3~ayan1
6. reboot and testing Fn+F3 and the behaviour is
when hit Fn+F3, the unity dash appear or disappear always, and
video mode is not changed.
Looks like the patch disable the super-p detection.
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https://bugs.launchpad.net/bugs/860436
Title:
It appears two mirror mode while boot up with VGA/HDMI cable and then
press FN+F3 to switch display mode
Status in “gnome-settings-daemon” package in Ubuntu:
In Progress
Bug description:
Summary: When system boot up with VGA/HDMI cable plugged, then switch
display mode will show mirror mode twice
Steps to reproduce:
1. Device connected to a LCD monitor with VGA/HDMI cable
2. Boot up this device
3. System enters ubuntu then the screen mode will be "Mirror" mode
4. Press FN+F3 to switch display mode
Expected Result:
Display modes should be "Mirror mode" -> "Extended mode" -> "Internal only
mode" -> "External only mode"
Actual Result:
Display modes are "Mirror mode" -> "Mirror mode" -> "Internal only mode" ->
"External only mode"
Note:
If connect VGA/HDMI cable after system boot up then it won't have this issue.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-settings-daemon/+bug/860436/+subscriptions
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