fglrx driver doesn't start DRI in Debian squeeze

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http://serverfault.com – I have a Toshiba Satellite P745D-SP4161M laptop with a AMD Radeon HD 6620G graphics card and a AMD A8-3500M APU with Radeon(tm) HD Graphics CPU. I have dual boot with Windows 7 and Debian Squeeze/Sid. I currently have a problem with the ATI propetary drivers. The Catalyst Control Center (amdcccle) and aticonfig are working fine, however glxgears, glxinfo, fglrxinfo and fgl_glxgears produce the following output: root@debian:/home/mirath# fglrxinfo X Error of failed request: BadRequest (invalid request code or no such operation) Major opcode of failed request: 139 (ATIFGLEXTENSION) Min (HowTos)