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From:  Nikos Chantziaras <realnc@arcor.de>
Subject: [gentoo-user]  Re: KDE4 halts - how to catch a reason?
Date:  Thu, 04 Jun 2009 23:11:33 +0300
Organization:  Lucas Barks
Message-ID: <h099p1$su8$1@ger.gmane.org>
References:  <200906050003.31259.a@gaydenko.com>
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Andrew Gaydenko wrote:
> Last week or two (I mostly use Gnome and can not say more precisely) after 
> KDE4 starting session apps starts also, as well as bg and panels. But then I 
> get black screen (during this KDE4 start process), and Ctrl-Alt-Backspace does 
> nothing. The only way I have in hand to continue is to use SysRq kernel 
> hacking (s, u, b).
> 
> Have you an idea how to catch the halt reason?

Try to ssh into the box from another machine and inspect the logs 
("~/.xsession-errors" and "/var/log/Xorg.0.log").