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I've seen a few other Q&As around this, but nothing that is exactly what I'm experiencing.

I have a new Lenovo X220 which I'm running the latest Kubuntu on. If I close the lid when I open it I get, 9/10 times, a flickering screen which sometimes updates around where the mouse is currently pointing and sometimes draws the wrong thing (i.e. it draws a program which is actually in the background)

Normally I've resorted to just rebooting if this is the case but I want to know if there is a better way of doing it?

Display drivers (lspci | grep VGA):

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
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    Have had a similar issue on Ubuntu 11.04. Starts with login and won't go without a restart.
    – abel
    Jul 7 '11 at 14:36
  • what display drivers are you using? Jul 7 '11 at 14:43
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    You'll likely have to wait until Ubuntu 11.10 for the problem to be fixed, unless you're willing to install a newer kernel and a newer version of the Intel X driver. The versions in Ubuntu 11.04 only have basic support for the new Sandy Bridge graphics. Jul 7 '11 at 16:35
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Do you happen to use Desktop Effects? Most display issues go away if I toggle desktop effects off/on by pressing Alt + Shift + F12 twice. If graphics effects are still buggy, I disable desktop effects.

Sometimes, the issue goes away if I disable desktop effects, start a full-screen application like HedgewarsInstall Hedgewars, from there enable graphics effects and exit hedgewars.

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  • typically my computer hasn't messed up since I posted this message - hence no accepted click yet but I'm eager to try your answer. fingers crossed!
    – Martyn
    Jul 8 '11 at 19:27
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I ended up having to reinstall and this fixed the issue!

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