Re: [Linux-fbdev-devel] Re: [PATCH] fbgen & multiple RGBA

[James Simmons]

> For the color component, yes, but you can't use a memcmp
> on the 'fb_var_screeninfo', as some member of the struct
> are irrelevant to colormap switching (you don't want
> to reinstall the colormap if only the refresh rate changed,
> for instance).

But it does. If you look at the console code it always calls set_palette
which in turn calls fbcon_set_palette which in turn calls fb_set_cmap. 
This happens every time you VC switch. A few driver writers noticed this
and don't bother with calling fb_Set_var in con_switch but instead a few
pieces of the function. But because of the way the current console system
is designed the colormap will always be set on VC switches.