[Linux-fbdev-devel] Which function is supposed to change the video settings ?

[Ghozlane T. <gt...@pr...>]

Hi all...

Can some one explain to me the way the actual (2.4/2.2) code changes
the video mode when one switch VC's ?

my problem is that the do_change_videomode() functions seems to
be called in most fb_drivers from 2 places : xxxfb_set_var() and
xxxfb_switch_con functions, the "problem" being that xxxfb_set_var()
calls fb_info.changevar() witch in turn calls do_change_videomode()...

If I'm not too tired, that makes 2 calls to do_change videomode when
someone calls set_var ?

If I want to avoid flickering when changinf VCs, where should I test for
resolution changes: before programming the videomode ? in set_var ?
switch_con ? both ?

actualy i think i'l a little bit confused with the supposed jobs of
xxxfb_set_var
and xxfb_switch_con ..
the first is called whan someone changes the resolution via fbset,
the last one when someone switches VCs ?

thank you for the help,
I just hope I didn't make a fool of myself by misreading the code ...

ghoz

PS actualy, i think just writing this email is helping me clearing the fog
...