Re: Samsung P35, S3, black screen (radeon)

Nigel Cunningham
2005-02-05T09:51:33Z

Hi.

On Sat, 2005-02-05 at 20:45, Pavel Machek wrote:
> Hi!
>
> > > > > battery does not run out, you just do resume-from-RAM"? Wow. Nice
> > > > > trick...
> > > > >
> > > > > But it has same video problems as suspend-to-RAM, no? On how many
> > > > > machines does it work?
> > > >
> > > > Yes, the same problems as suspend-to-RAM. I'm not sure how many machines
> > > > are using it at the moment. I'd love to try it on my laptop; that would
> > > > be one more, and I'd also try to get STR working on my HT desktop
> > > > machine (Radeon video) if I had the chance. Oh yeah... and I'm going to
> > > > have another go at merging. Get the idea I've got a lot I want to do? :>
> > >
> > > Actually, getting STR work on SMP/HT machine is going to be quite a
> > > lot of work -- because you need to boot secondary CPUs without
> > > touching contents of RAM. I hoped CPU hotplug people or Intel ACPI
> > > people were going to solve it for me, but unfortunately that did not
> > > happen :-(.
> >
> > Zwane is working on CPU hotplug. I'm assuming I'll be able to rely on
> > his work. He said the other day he was up to testing on x86-64. Are you
> > meaning you just haven't seen the code in action, or that you've found
> > some reason that hotunplugging won't work?
>
> Last time I checked (long time ago) he did not really put CPU back to
> real mode on "unplug"; he just made it spin in protected mode. You can
> use his framework, but you really need to boot the cpu from real
> mode....

Okay. I already have it spinning in protected mode for Suspend2, so that
wouldn't be a gain. I'm pretty sure though that he's seen my current
code and believes his is a gain :> We'll see...

Nigel
--
Nigel Cunningham
Software Engineer, Canberra, Australia
http://www.cyclades.com

Ph: +61 (2) 6292 8028 Mob: +61 (417) 100 574