Re: [gentoo-user] kdm 4.2.2 not configurable?

[Paul Hartman <paul.hartman+gentoo@gmail.com>]

On Wed, Apr 22, 2009 at 6:22 AM, Roy Wright <roy@wright.org> wrote:
> Howdy,
>
> Well I just went back to using two monitors in twinview mode after a few
> months of single monitor suffering.  But now when KDM start I get half a
> screen of garbage on the left half of the left monitor and on the right
> half of the right monitor.  OK, should just need to set the background
> image.  So head over to Computer, System Settings, Advanced, Login
> Manager but got a problem, everything there is disabled.  Docs imply
> there should be an Admin button but it's not there (Have: Help,
> Defaults, Reset(disabled), & Apply(disabled)).
>
> Thinking, oh well, off to /usr/kde/4.2/share/config/kdm, edit kdmrc and
> set GreeterScreen to -1 (the only multi display setting I saw) to see
> what happens.  Ran genkdmconf.  Restarted xdm.  No change.
>
> Any ideas?

KDM does the same for me on a wide-screen monitor. In fact it could be
a security risk because after logging out of KDE, random pieces of
screen from the last session sometimes show up on the garbage parts on
the sides, including potentially sensitive information. It does not
appear to support any kind of screen size detection. What you need to
do is find (or make) a theme that is the same size/aspect ratio as
your display setup and then it'll be okay. It's trying to use a 4:3
theme on a 8:3 or 16:9 or whatever and apparently the KDM people
haven't gotten around to dealing with that yet.