Re: drmfb console switching problems/questions

[stsp]

09.10.2020 14:59, Thomas Zimmermann пишет:
> Fbdev exposes the video ram (or a shadow buffer of it) to all
> applications. Only one can draw at the same time. It's a limitation of
> the design. To fix this, your application has to stop drawing when you
> switch consoles.
OK, thanks for info.
Quite a sad news, if you ask me.
Is there any ongoing work at solving that?

Anyway, the fact that fb can
permanently hang, is, I suppose,
another problem - the one that
can't be worked around in an app.
I suspect it is the result of sdl doing
ioctl(console_fd, KDSETMODE, KD_GRAPHICS);
After which, I think, redrawing on a
VC switch became disabled.
Would it make sense to improve SAK
to unfreeze from that? Otherwise its
too easy to hang the screen permanently,
and no way to recover.