https://bugs.freedesktop.org/show_bug.cgi?id=43448
--- Comment #21 from Michel Dänzer michel@daenzer.net 2012-06-25 02:30:51 PDT --- (In reply to comment #20)
Radeon 7570 card - PCI identifier 675D
That's a different card from the one this bug report is about.
libdrm-radeon1 & libdrm2: 2.4.33-1
Support for your card was only added in libdrm_radeon 2.4.34.