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I just built a new computer and installed 11.04 on it. All was perfect for a few days, then this morning, SuperTuxCart and Minecraft (both 3d and the only 3d programs on this machine, coincidence?) both started flickering really bad, but only those.

What causes this and how can I fix it?

Per the comments:

Did this suddenly happen?

Yes, those programs were running fine one day, flickering the next.

Were these programs running fine before?

Yes, perfectly.

What did you do different? (installed/removed drivers/applications, changed hardware, etc.)

I had not made any changes in the 2 days it had been built because everything had been running fine.

What are your GPU specs?

$ lspci -v
01:05.0 VGA compatible controller: ATI Technologies Inc RS880 [Radeon HD 4250] (prog-if 00 [VGA controller])
    Subsystem: Micro-Star International Co., Ltd. Device 7596
    Flags: bus master, fast devsel, latency 0, IRQ 18
    Memory at d0000000 (32-bit, prefetchable) [size=256M]
    I/O ports at d000 [size=256]
    Memory at feaf0000 (32-bit, non-prefetchable) [size=64K]
    Memory at fe900000 (32-bit, non-prefetchable) [size=1M]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: <access denied>
    Kernel driver in use: fglrx_pci
    Kernel modules: fglrx, radeon
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closed as too localized by Luis Alvarado Mar 14 '13 at 15:36

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2  
What are your GPU specs? Did this suddenly happen? Were these programs running fine before? What did you do different? (installed/removed drivers/applications, changed hardware, etc.) Any information about your computer's architecture will be useful, specially that related to your GPU. –  Geppettvs D'Constanzo Aug 18 '11 at 1:47
    
This suddenly happened. Those programs were running fine before. I made no changes to the machine around the time the problem started. I will find and post specs. –  John Aug 18 '11 at 1:51
    
¬¬ Thank you... –  Geppettvs D'Constanzo Aug 18 '11 at 1:53
    
You may want to reset your unity settings; unity --reset –  alexy13 Aug 18 '11 at 2:14
    
@Geppettvs I have added what I believe to be the information you wanted. Is there any other specific command I can run that would produce helpful information? –  John Aug 18 '11 at 2:32

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