https://bugs.freedesktop.org/show_bug.cgi?id=84500
--- Comment #8 from Christian König deathsimple@vodafone.de --- (In reply to Michel Dänzer from comment #7)
So, it looks like the value for the R_028A3C_VGT_GROUP_VECT_1_FMT_CNTL register and the following PKT3_SET_CONTEXT_REG header were scribbled over with the value 0x0000000b00000000. Looks like memory corruption to me.
Yeah, agree that strongly looks like a memory corruption. Which would also explain all the crashes.