Re: [git head] Should X86_PAT really default to yes?

[Ingo Molnar <mingo@elte.hu>]

* Frans Pop <elendil@planet.nl> wrote:

> On Friday 02 May 2008, Jesse Barnes wrote:
> > This is just a transient issue during VT switch or server exit though,
> > right? X functionality isn't affected, and your VTs work fine?
> 
> Transient only. I've just tested again and this time the band was 
> visible on top of the text on VT1 for about 2 seconds. Then it 
> disappeared. The artifacts also appear when I log out from KDE (i.e. 
> without exiting the server), and I also get the messages when logging 
> out and logging in again.
> 
> I do not see any performance issues, but I've only used this kernel 
> for a very short time.
> 
> > If so, it might not be a PAT issue but just a different memory 
> > layout or something (and therefore it would really just be a 
> > cosmetic bug in the X driver).
> 
> The artifacts may not be a PAT issue directly, but it is a clear 
> regression for me as I currently have a nice clean screen when X shuts 
> down. I'm also 100% sure that it is caused by enabling PAT. A kernel 
> with same config and only PAT disabled does not show the artifacts.

ok, Cc:-ed more folks - this bug has to be resolved regardless of the 
default selection.

	Ingo