[ATrpms-users] Kernel options question

[Jarod Wilson]

On Friday 20 July 2007 08:53:43 am Axel Thimm wrote:
> On Fri, Jul 20, 2007 at 08:00:21PM +1000, Matthew Moore wrote:
> > Hi Axel,
> >
> > I've been doing some reading on the Myth mailing lists on the strange
> > occurance of 'galloping' horizontal scrolling.  It seems the problem is
> > created by the difference between screen refresh rates of NTSC and PAL
> > (30 vs 25) and can be solved via the tuning of the kernel parameter
> > "CONFIG_HZ" to a number which is evenly divisible by both formats.  Now
> > I'm by no means a kernel expert, but I understand that this specific
> > parameter shouldn't adversely effect most users if it is tweaked to an
> > alternate setting.
> >
> > What's your opinion of changing the default to either 300 or 3000?
>
> The tendency is to get to tickless kernels altogether, in fact F7 is
> shipping such a kernel for i386 by default.

We've got tickless x86_64 in rawhide now too. I believe the forthcoming F7 
2.6.22.1-based kernels in updates-testing have tickless x86_64 also...

> Furthermore I don't think 
> the kernel's CONFIG_HZ has anything to do with screen refresh rates,

Alan Cox swears up and down that it does. :)

> so the problem must be something else, perhaps more related to the
> graphics driver and the interaction of myth with it.

But I've never had any problems with any of my myth boxes.


-- 
Jarod Wilson
jarod at wilsonet.com