'screen cannot be larger than 2048x2048' after upgrade

I have a Samsung NC10 (Intel GMA 945) which I use together with an external monitor (1280x1024). The external screen is to the right of the netbook, so I want to use the --right-of option in xrandr. This worked fine after adding 'Virtual 2304 1024' to xorg.conf.
Today I ran pacman -Syu which, among other stuff, updated xorg-server (1.6.1.901-3 -> 1.6.3-2). After the upgrade, I can't get dual screen to work the same way as before - when running xrandr, I get
xrandr: screen cannot be larger than 2048x2048 (desired size 2304x1024)
After searching around a bit I found that 2048x2048 is a hardware limitation. However, this is with 3D acceleration - DRI should be disabled here (it was before the upgrade, and xorg logs state that DRI is disabled). If DRI isn't the problem, why was I able to do it this way before the upgrade?
Any suggestion on how to fix this, other than downgrading, is much appreciated. For now I can use --below, but it is far from optimal.

I've positioned my external monitor below built-in, and this worked. But when I next turned on my laptop without external monitor - my mouse cursor became invisible (changing it does not help, rebooting does not help either). Now I can only see a visible mouse cursor if an external monitor is connected. Any ideas how to fix this?
Last edited by StrangeAttractor (2010-08-30 20:20:32)

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