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I have installed fglrx proprietary drivers for my Dell Inspiron R5010 laptop running on ubuntu 12.04LTS. I could open the AMD catalyst center from dashboard and adjust the settings. But when I type fglrxinfo I get the following output:

sabin@Sabin:~$ fglrxinfo
X Error of failed request:  BadRequest (invalid request code or no such operation)
  Major opcode of failed request:  139 (ATIFGLEXTENSION)
  Minor opcode of failed request:  66 ()
  Serial number of failed request:  13
  Current serial number in output stream:  13

Now I can't adjust the size of launcher icons.

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Does your laptop have hybrid graphics? Is it intel-AMD or AMD-AMD? –  jmite Oct 1 '13 at 3:51
    
@jmite Yes ATI Radeon 4560 1GB Graphics card. –  Sabin Jose Oct 3 '13 at 13:22
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