[PlanetCCRMA] rt question

[Fernando Lopez-Lezcano]

On Mon, 2007-04-16 at 17:13 -0700, Fernando Lopez-Lezcano wrote:
> On Mon, 2007-04-16 at 17:44 -0400, Peter Hartmann wrote:
> > I'm getting the feeling that rt-kernels and the suspend feature are
> > like oil and water.  is that true?  I'm getting the black screen when
> > trying to resume.
> 
> I have not tried that feature, maybe others have?
> Which kernel and which distro version are you using?

Ingo says:

--------
* Fernando Lopez-Lezcano <nando@ccrma.Stanford.EDU> wrote:
> I've had a couple of reports of problems but nothing consistent. Juan 
> Pablo here at CCRMA (cc'ed) has seen occassional hangs with his laptop 
> but I have nothing to offer you in terms of debugging info. Just 
> yesterday somebody else was reporting problems with suspend in the 
> Planet CCRMA list...

2.6.20-rt has an older variant of the high-res timers / dynticks code, 
and that has suspend problems (especially with hpet timers). An 
hpet=disable boot option might help. Should be mostly fixed in the 
v2.6.21-rt series. (the fixes are not simple so no easy backport 
possible i'm afraid)

	Ingo
--------

So maybe there may be a fix when 2.6.21 + rt is released (soon, I
think). For now you could try booting with "hpet=disable" and see if
that fixes your problem. 

-- Fernando