Is it bottle neck in X or the kernel?

Alastair Johnson alastair at
Fri Oct 3 12:45:35 CEST 2008

Kishore wrote:
> My question here is: Is it X or is it the kernel that is the weak link that 
> sometimes make the FR painfully slow to operate?

In my experience neither. It is usually some process hogging the CPU for 
no apparent reason. Which one varies depending on image, version etc.

> I now have qtextended 4.4.1 installed with the 4.3.2 release's kernel and the 
> UI is really fast! When i first flashed 4.4.1 rootfs, i still had the kernel 
> from FDOM and while the UI was first on first boot it became slow over time. 
> FDOM was slow from the start.
> Debian with XFCE OTOH was pretty fast and the change in kernel for qtextended 
> made significant difference so i am thinking the slowness is likely kernel 
> related.
> Now with qtextended i still have a somewhat flaky audio playback. I have not 
> tried video!
> I would appreciate anyone throwing more light on the issue.

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