Hi,
I have the same issue, though I used libdrm-radeon1 from the testing release (version 2.4.27-1). In #651316 they state that the fault is not present with this version. To be eager I installed version 2.4.29-1, that contains the fix for #651316, and the crash is still the same. I also tried installing the 11.12 version of ATI driver, and the fault is the same with that too. Regards, Viktor