Re: Subtle semantic issue with sleep callbacks in drivers

[John Bradford]

> > > The video BIOS on a card often contains information that is found
> > > -nowhere- else.  Not in the chip docs.  Not in a device driver.
> > > Such information can and does vary from board-to-board, such as RAM
> > > timings, while the chip remains unchanged.
> > 
> > Incidently, what happens if we:
> > 
> > * Suspend
> > * Swap VGA card with another one
> > * Restore
> 
> When it breaks, you get to keep both pieces.
> 
> That's a "Don't Do That" issue for any hardware between suspend
> and resume.

Hmm, well what about with a PCI hotswap capable board - presumably
then we could have the situation where a new VGA card appears that we
_have_ to POST?

John.