Comment 8 for bug 223770

On Tue, 2008-10-14 at 20:27 +0000, Chris Coulson wrote:
> hyperair - gnome-power-manager doesn't invoke pm-is-supported. g-p-m
> gets the power capabilities over HAL, which gets them from pm-utils. HAL
> only checks the capabilities when it starts I think.
>
Whoops. Forgot about HAL.
> Thinking about it, I'm not sure this is such a good idea. The used RAM
> is compressed before being written to swap when you hibernate, so I
> think it is difficult to predict exactly how much disk space is required
> for hibernation. I wouldn't want my machine to suddenly decide to
> disable hibernate on the off-chance that the image might not fit on
> disk. I would rather it tried to hibernate, and then failed gracefully
> if there was not enough disk space to hibernate. In this situation, the
> user should then be presented with a message telling them why hibernate
> failed (which doesn't happen currently, and there is already a bug
> report for that somewhere).
I'm not sure if pm-utils' kernel method does compression, but I'm very
sure that uswsusp's s2disk does it. Either way, you're right. In that
case, could you locate the bug and mark this bug as a duplicate of the
said bug?
>
> And I think that it would be even more confusing to users if they find
> that hibernate keeps disappearing and reappearing in their session
> dialog or fast user switch applet of whatever they use, for seemingly no
> apparent reason.
Yeah, putting it that way certainly brings things into perspective.

--
Chow Loong Jin