Hi,

I had never heard of these drivers before, and did some googling. 
According to https://help.ubuntu.com/community/BinaryDriverHowto/ATI,

    By default Ubuntu will use the *open source* AMD or Radeon driver
    <https://help.ubuntu.com/community/RadeonDriver> for cards
    manufactured by AMD. Some users however prefer the proprietary fglrx
    driver for various reasons.

Does this mean that you had previously disabled AMD or Radeon and then 
installed fglrx?  How does one tell if one has radeon or fglrx?  How 
does one go about switching?  What, if any, risks are involved in doing so?

I am not the only one affected by this problem, so if you could post a 
simple step-by-step, you'd probably benefit a lot of people. Perhaps a 
good place would be here in the R-help thread, as well as in the ububtu 
bug launchpad thread.

Best,
Andrew




On 05/24/2013 02:22 AM, wmpauli [via R] wrote:
> HI,
>
> I was able to fix this on my computer by not using the fglrx driver 
> (fglrx-update package on Radeon HD 7570), but the open-source radeon 
> driver.
>
> Best,
>
> Wolfgang
>
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