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Bug#766088: debian-edu-artwork: Unable to upgrade from version 0.49-1 to 0.50-1



Hi Wolfgang,

(re-adding the bug..)

On Mittwoch, 22. Oktober 2014, Wolfgang Schweer wrote:
> By default only debian-edu-artwork and debian-edu-artwork-lines are
> installed. Someone who needs/wants historic artwork will intentionally
> install d-e-artwork-joy or d-e-artwork-spacefun. This theme is activated
> then. So IMO no huge problem.

well, imagine a school gets installed, everybody (well, most people) is happy 
with the shiny lines background, time passes, some admin discovers the other 
artwork packages and installs them, to give people choices. And suddenly the 
phone starts to ring, as random people will have their background changed. 
Some will think they have been hacked! 

And besides that, it's just broken design.

Also: upgrades. Say you install lines and joy and choose joy (manually, the 
way it's described in this report). Or spacefun. And then, an upgrade comes, 
and on some machines joy/spacefun sttill is the theme used, while on some 
others it's suddenly lines. This must not happen. (But this will happen 
currently as package installation order is not deterministic...)
 
> I found the above mentioned divert to be needed as:
> 
> - Gnome/gdm3 seems now to be different/not respecting configuration in
>   desktop-base like kdm and lightdm.
> 
> - The gdm3 login screen seems to be already a (scriptable)
>   gnome-session, configured in
>   /usr/share/gnome-shell/theme/gnome-shell.css
> 
> - I was unable to find a way other than diverting to change the
>   background (configured as a small 'repeated' image in 'background')
>   inside the css file. This image fills up the whole screen (making up a
>   black background).

Thanks for this description! I will think about a better way...


cheers,
	Holger


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