kde xinerama question

[novacrasher]

Hello, I just got my gentoo box setup with dual monitors and twinview. I don't think that my kde is setup to support xinerama. I could be wrong though. If I try to maximize a windows it maximizes it to both screens and I can only have one desktop background and I heard with xinerama it allows you to have different backgrounds on each screen. Anyways, I was wondering if I had to recompile kde or the kernel with xinerama support and if I do how would I go about doing this. I am a newbie so please be descriptive and specific. Thank you so much for the help. Here is my xorg.conf file in case you need it.

[mwilliamson]

Check and see if you have xinerama in your make.conf. If not then you will need to recompile KDE with xinerama on.

[novacrasher]

okay so yes, I figured that would be the case. My next question is how do I go about doing this? Do you mean re-emerge it? If I do an emerge -vp kde, xinerama is not listed as one of the USE flags. Sorry if I sound like an idiot but I guess I have to start somewhere. I have already made xinerama a global use flag. Also, is there a way of doing an update such as an emerge world that will recompile all of the programs on my computer that are compatible with xinerama? Maybe I am just being hopeful. Thanks again for the help and the replies.

[Tlaloc]

What you are looking for is the --newuse argument of emerge. So now that you have added the xinerama use flag to your make.conf do an
emerge -pv --newuse world. If the output is okay issue the command again without the --pretend and wait.
When all is finished in the control centre under Devices -> Monitor or so there should be new settings for xinerama now.
As for different wallpapers on the desktop, you will need to have emerged kde 3.5 for that, which besides has much better xinerama support than prior versions. E.g. you will have one kicker instance per screen if you don't have set the monitors as one big screen. I don't because my screens have different dpi specs.

Bye, Valentin.