How to take a screenshot of the login screen?

[Greeface]

I was wondering how I would go about taking a screenshot of my GDM Login screen. The 'Print Screen' key didn't work, but I kinda expected that.
Thanks

[aysiu]

I think some kind of emulator helper program (like Qemu) might help. I'm thinking you'd boot a live CD through Qemu

qemu -cdrom /dev/cdrom

install the theme you want, log out, then take the screenshot...

[carbon-12]

sudo apt-get install xnest
gdmflexiserver --xnest

Then System -> Take Screenshot

[benplaut]

Originally Posted by carbon-12 sudo apt-get install xnest gdmflexiserver --xnest Then System -> Take Screenshot

scratch that last step, just do prt-scrn and alt

and no, i don't think there's a way to get the xnest res higher

[Greeface]

Hey,
When I do 'gdmflexiserver --xnest' it says "Cannot start new display. You do not seem to have the authentication needed for this operation. Perhaps your .Xauthority file is not set up correctly."
Any ideas?
Thanks

[carbon-12]

Originally Posted by benplaut scratch that last step, just do prt-scrn and alt and no, i don't think there's a way to get the xnest res higher

In Xnest, I'm able to change the resolution using -geometry HxW. For example:

Xnest :1 -geometry 1024x768

would give me a window 1024x768. Can't figure out how to get it to work with gdmflexiserver though.

[carbon-12]

Originally Posted by Greeface Hey, When I do 'gdmflexiserver --xnest' it says "Cannot start new display. You do not seem to have the authentication needed for this operation. Perhaps your .Xauthority file is not set up correctly." Any ideas? Thanks

Hmmm thats strange, that only happens if I try to start gdmflexiserver with sudo. Your doing this as a user right? This all seems to work on my machine:

http://img496.imageshack.us/img496/662/gdmxnest7zu.jpg

To be honest, I'm not really sure what else the problem could be (I'm not 1337 enough ). Someone whos a lot smarter than me will proably come along though

[carbon-12]

OK I just tried something different and it seems to work with user and sudo, so maybe this might solve your problem.

gdmthemetester console /usr/share/gdm/themes/THEME_NAME/

For default Ubuntu,
THEME_NAME = Human

and just:

ls /usr/share/gdm/themes/

for the other ones. Hope that helps.

[Greeface]

Ah, okay. I was doing that as root and that was my problem. Thanks for all of the help!

[matthewburke]

Originally Posted by Greeface Hey, When I do 'gdmflexiserver --xnest' it says "Cannot start new display. You do not seem to have the authentication needed for this operation. Perhaps your .Xauthority file is not set up correctly." Any ideas? Thanks

I actually get the same error. Only I have tried it both as root and as myself. It works fine if I boot normally into gnome. I get the error when I am in a gnome XGl compiz session. Can anyone help me with this.

Here's the error:
Screenshot-gdmflexiserver.png