Ubuntu 10.04 not detecting multiple monitors

Posted by razass on Super User See other posts from Super User or by razass
Published on 2010-05-11T05:24:36Z Indexed on 2010/05/11 5:34 UTC
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ubuntu

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ubuntu-10.04-lts

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dual-monitor

I have 2 graphics cards, the output from the lspci:

01:00.0 VGA compatible controller: ATI Technologies Inc RV770 [Radeon HD 4850] 02:00.0 VGA compatible controller: ATI Technologies Inc RV710 [Radeon HD 4350]

I have one monitor connected to the 4850 and 2 connected to the 4350. However when I go into System > Preferences > Monitors the only monitor shown is the one connected to the 4850.

Is there something I need to enable for it to be able to use the other card? How do I get this to work.

Thanks.

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