Avoid dark colors in the system

[SomeoneToIgnore]

Current rootfs with Gnome has plenty of dark theme UI elements:

• Debian terminal that's shown during initial load (before any login screen) has black background and white letters
• Gnome desktop background is black, same as gnome menu (with reboot, wifi, etc.)
• Gnome toolbar is black
• Certain Gnome effects (when you press "Applications" button, for instance) dim the colors and make them dark
• on-screen keyboard is dark
• ... presumably, more unnoted things

All that leaves extensive ghosting and presumably takes more resources to draw than needed.

[m-weigand]

The PN chat recommended

https://github.com/fujimo-t/gnome-shell-theme-e-ink

We should check that out for default integration into the image

EDIT: A quick tests leads to text not showing in the on-screen-keyboard. Not sure what needs changing here...

[m-weigand]

Why does it take more resources to draw black colours? My understanding is that white/black are just related to the different voltage polarity applied to the pixels within the epd display. i.e., this should be a symmetric problem, but I could be wrong (same goes for ghosting: should be the similar effects for white->black and black->white transitions).

[SomeoneToIgnore]

I am not sure about the resources, but the time it takes to draw a fully black square is definitely longer than a white square with black border and all the transition animations between. Also, "dark -> darker" transitions (mostly used in animations) are harder to notice.

I don't have good examples, but can see notable difference in the way UI feels more responsive when switched to non-dark background.

[SomeoneToIgnore]

Should be better with https://github.com/MichiMolle/PNEink

[jonassmedegaard]

This issue seems solved since 1940f02 in january. Perhaps appropriate to close it?