Le 11 novembre 2016 17:35:14 GMT+01:00, Michael Biebl <bi...@debian.org> a 
écrit :
>Package: desktop-base
>Version: 9.0.0~exp1
>Severity: normal
>
>Hi,

Hi Michael

>I have a laptop with a 16:9 display and and external monitor with 16:10
>aspect ratio.
>
>After installing desktop-base, the grub wallpaper was set to
>/usr/share/desktop-base/active-theme/grub/grub-4x3.png which looked
>via /etc/alternatives/desktop-grub
>
>Nowadays, we should make
>/usr/share/desktop-base/active-theme/grub/grub-16x9.png the default,

We try to do this with the assumption that a grub-efi* package is installed 
means the system boots with UEFI and so is a reasonably recent system that 
would more likely have a 16/9 screen.
Out of curiosity is your system UEFI capable but currently booting in BIOS mode 
?

> or even better, detect the aspect ratio in postinst and set it
>accordingly.

The question of screen ratio detection was already asked in your former #607104 
bug report. Is is close enough that we can merge the two bugs ?

But like Paul said in his other reply, I'm not sure postinst is the right place 
to do so and GRUB should do that at runtime.
Some desktop environments support this and choose between different available 
wallpaper resolutions or at least crop it. Unfortunately GRUB doesn't do that 
for what I know.

At least with the theme pack system I’m putting in place for Stretch your ratio 
preference for grub should be preserved for future upgrades while still getting 
the new artwork.


Cheers,
--Aurélien

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