On Thursday, February 21, 2008 5:28 pm Linus Torvalds wrote: > On Thu, 21 Feb 2008, Jesse Barnes wrote: > > So the advantage of the kernel suspend/resume hooks for the DRM layer is > > that the kernel video drivers can do full state save/restore (which X > > usually doesn't do, and isn't really designed to do), so that if your > > platform *doesn't* do it all, you'll still end up with a usable machine > > in the end. > > Well, I'm also hoping that eventually we could even just not do the VT > switch at all, and the kernel can treat X as "just another user process" > that it freezes. Hell yes. > At least from a mode setting standpoint. > > We'd still want to make sure that X repaints the screen if the contents > were lost, of course. And this is going to depend very intimately on the > type of graphics card and whether the video RAM is saved by STR or not - > for the Intel integrated graphics kind of situation, the video RAM will be > refreshed along with all the other memory, but for other cards we may end > up having to do the VT switch not so much for modesetting reasons as just > a way to get X to save and restore all the *other* state. Drivers supporting kernel modesetting will have to stuff their VRAM somewhere, yeah. Hopefully X won't have much to do with it though... > How close is the i915 driver from not having to even signal X? Or is that > just a pipedream of mine? It's there in the modesetting tree (though the requisite changes to avoid VT notification aren't done, it should all work fine). Jesse - To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
