[ATrpms-users] Kernel options question

Axel Thimm Axel.Thimm at ATrpms.net
Fri Jul 20 14:53:43 CEST 2007


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. Furthermore I don't think
the kernel's CONFIG_HZ has anything to do with screen refresh rates,
so the problem must be something else, perhaps more related to the
graphics driver and the interaction of myth with it.

> TIA,
> 
> Matt.
-- 
Axel.Thimm at ATrpms.net
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