1) Windows -> US International + Br.PT -> '+c = ç
2) Windows -> US International + EN.US -> '+c = 'c
3) Ubuntu -> US International + Br.PT -> '+c = ć
4) Ubuntu -> US International + EN.US -> '+c = 'c
My expectation would be to have the behavior #1 == #3 across the whole
environment, i.e., terminal, gedit, libreoffice...

Previous versions and flavors don't need to be fixed, IMHO.
Focus on the next release because we already have workarounds for the
previous releases.

Regards

On Tue, Mar 31, 2015, 19:15 Gunnar Hjalmarsson <email address hidden>
wrote:

> On 31/03/2015 23:37, Gunnar Hjalmarsson wrote:
> > Just like you I think it would be more natural to create an
> > alternative keyboard layout which could be selected in Text Entry. I
> > just don't know if and if so how it could be accomplished.
>
> To clarify: As you know, I figured out how to add an alternative
> keyboard layout. What I don't know is how you would fix it in xkeyboard-
> config so the same dead key behaves differently depending on the letter.
>
> One possibility which we haven't discussed is to use some *other* key
> for dead_cedilla, and leave the behavior of the dead_acute key as is. I
> see two problems with that, though:
>
> 1. No obvious dispensable key which could be used for the purpose.
>
> 2. It would be a brand new behavior for the users, and different from
>    how it works on Windows.
>
> --
> You received this bug notification because you are subscribed to the bug
> report.
> https://bugs.launchpad.net/bugs/518056
>
> Title:
>   cedilla appears as accented c (ć instead of ç) when typing 'c
>
> Status in central project for keyboard configuration:
>   Confirmed
> Status in gtk+2.0 package in Ubuntu:
>   Confirmed
> Status in xkeyboard-config package in Ubuntu:
>   Confirmed
>
> Bug description:
>
>   When typing in a US-international keyboard with dead-keys (or
> UK-international),
>   typing 'c results in an accented c instead of a cedilla.
>
>   There is a workaround, which is editing the
>
>   /usr/lib/gtk-2.0/2.10.0/immodule-files.d/libgtk2.0-0.immodules
>
>   file and changing the line
>
>   "cedilla" "Cedilla" "gtk20" "/usr/share/locale"
>   "az:ca:co:fr:gv:oc:pt:sq:tr:wa"
>
>   to
>
>   "cedilla" "Cedilla" "gtk20" "/usr/share/locale"
>   "az:ca:co:fr:gv:oc:pt:sq:tr:wa:en"
>
>   (add the 'en' at the end).
>
>   However, every time some update on this file is applied, one looses the
> change,
>   and we get back to the accented c. That means having to modify the file
> again,
>   logout and login.
>
>   For me this is no problem. But for my brother, mom, dad, etc, it is
> always something
>   that at least makes me less proud of having convinced them to use
> Ubuntu, because
>   they don't know what to do each time this happens.
>
>   I think we really need a configurable keyboard layout, or at least (and
> that would
>   be very easy), the inclusion of alternate layouts on install that for
> the dead-key
>   options (as US-deadkey and UK-deakey), alternate layouts as
> US-deadkey-cedilla.
>
>   This change is relevant for at least Portuguese and French.
>
> To manage notifications about this bug go to:
> https://bugs.launchpad.net/xkeyboard-config/+bug/518056/+subscriptions
>