I tried it my self.... Here are the steps..
Disable gnome printscreen shotcuts .. (All Settings--->Keyboard---->Screenshots
)
Next create shortcuts as preferred (All Settings--->Keyboard---->Custom shortcuts
)
Shutter -f
And assign printscreen key. ( See more for how to assign a custom key ) How to add keyboard shortcuts?
And next shortcut for shutter -a
And assign alt key and printscreen ( See more for how to assign a custom key ) How to add keyboard shortcuts?
Then open shutter and go to menu (Edit--->preference--->main
)
Select Do not save file automatically
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
At this point you have achieve main screen by pressing printscreen button or Alt + printscreen button..
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
To open edit windows, instead of main screen, when ressing printscreen button or Alt + printscreen button, go to Actions in preference and select open with Built-in Editor
And make sure other settings remain as below in behavior section,
Done!!
I believe the 'ACPI PCC probe failed' is a separate issue from your display brightness. I base this hypothesis on the following:
- http://permalink.gmane.org/gmane.linux.power-management.general/56400
- Similarly: http://comments.gmane.org/gmane.linux.acpi.devel/73411
- You have stated you no longer see the 'ACPI' message after you upgraded
- You still see 'Starting Version 219'
- The boot process is controlled by 'Systemd' current version 219
- I see 'ACPI PCC probe failed starting version 219' only after a previously hibernated or suspended session has been resumed and then rebooted, or shutdown and then started
- There are many questions on AskUbuntu and many other sites regarding this message and each seem to have a different set of repeatable steps to replicate the message
- The 'ACPI' message is a bug: https://bugzilla.kernel.org/show_bug.cgi?id=92551
My research shows that the kernel is looking for the Platform Communications Channel Interface which is a new ACPI interface that not too many devices support yet. The error return messages are PCCT header not found. followed by ACPI PCC probe failed. Per Ashwin Chaugule code creator found here https://github.com/torvalds/linux/blob/master/drivers/mailbox/pcc.c
My relevant journalctl output
sodu journalctl
Aug 16 23:10:55 x kernel: PCCT header not found.
Aug 16 23:10:55 x kernel: ACPI PCC probe failed.
In all I think there are too many variables for so many seeing the same message. Statistically this makes your unique issue a higher probability that it is unrelated to your display brightness controls. Further, if you read the emails completely in the first two points in the list above I think it is clear that a work around was developed inside the code the developers created that would be attended in the future for upstream releases.
I know this does not completely answer your issue but I am hoping it will focus others with more Linux Ubuntu 15.04 knowledge and experience to a solution or a working hypothesis to resolve it.
Best Answer
Here is the way to change keyboard shortcuts in Lubuntu https://help.ubuntu.com/community/Lubuntu/Keyboard#Create_New_Keyboard_shortcuts Open
lubuntu-rc.xml
in your favorite editor.. (Mine its vim, it could be leafpad/vi/nano )then find the following code..
Comment out
<command>lxsession-default screenshot</command>
and add<command>shutter -f</command>
.. (or just you can replace, instead of commenting, but I prefer doing so)And also you can replace ( Alt + Print ) option by changing to this shutter -a in the following manner..
Then reload openbox
Rest are same as this
Then open shutter and go to menu (
Edit--->preference--->main
) Select Do not save file automatically+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
At this point you have achieve main screen by pressing printscreen button or Alt + printscreen button.. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
To open edit windows, instead of main screen, when ressing printscreen button or Alt + printscreen button, go to Actions in preference and select open with Built-in Editor
And make sure other settings remain as below in behavior section,
Done!!