How can I reinstall XRandR without serious disruption to 12.04?

Posted by broiyan on Ask Ubuntu See other posts from Ask Ubuntu or by broiyan
Published on 2012-05-02T10:00:20Z Indexed on 2012/11/15 5:10 UTC
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12.04

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xrandr

This is the sequence that leads to xrandr going missing:

Installed 12.04 on a system with a motherboard using the Intel G45 chipset and the E8400 Core 2 Duo and AMD Radeon HD 5450 video card.
Installed fglrx when ubuntu prompted via Additional Drivers.
Ran Catalyst (Administrative) to select multi-desktop and rebooted.
Ran Catalyst (Administrative) to select Xinerama and rebooted.
Answer yes to about 3 prompts that request to send bug reports to ubuntu.

At this point Settings > Appearances no longer offers the widget that allows you to resize the Unity Launcher icons. Also Settings > Displays says randr extension is not present.

BTW: This same sequence is repeatable, including the issues with the missing icon resizer and xrandr, so there is clearly bug fixing potential here.

How can I get xrandr reinstalled without un-installing a large set of dependencies? I realize that if I un-install xrandr I will have the chance to re-install but the number of dependencies is large and so an un-install will cause many systems to be un-installed and I am afraid that will ruin Ubuntu 12.04. Hence, I'm looking for a more direct fix. I thought rebooting the .ISO disk and reinstalling would be a good fix but obviously not since this problem is repeatable.

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