Video PM Methods

[Matthew Garrett]

On Tue, May 16, 2006 at 03:17:23PM -0400, Peter Jones wrote:

> Is that true when the active VT isn't the one X is associated with?
> (that is, when X isn't drawing and the screen is in fbcon and/or text
> mode)?

Yes. You shouldn't be able to do it if X is active - vbetool checks that 
the console is "text mode" (which is true for framebuffers, but not for 
X)

> I assume it's because the clocks are changed, but I wouldn't expect that
> to be a problem unless they changed while X was active.

Yeah, I don't understand it either. And since understanding it would 
require understanding Intel's BIOS, I'm happy to keep it at arm's 
length. There's nothing stopping an application from querying hal during 
boot and using that information to decide whether to save the state.

-- 
Matthew Garrett | mjg59 at srcf.ucam.org