[ 3.893731] [drm] radeon kernel modesetting enabled.
[ 3.893999] radeon 0000:01:00.0: enabling device (0000 -> 0003)
[ 3.981302] radeon 0000:01:00.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=none
[ 3.985658] radeon 0000:01:00.0: VRAM: 2048M 0x0000000000000000 - 0x000000007FFFFFFF (2048M used)
[ 3.985659] radeon 0000:01:00.0: GTT: 1024M 0x0000000080000000 - 0x00000000BFFFFFFF
[ 3.985769] [drm] radeon: 2048M of VRAM memory ready
[ 3.985770] [drm] radeon: 1024M of GTT memory ready.
[ 3.989750] [drm] radeon: dpm initialized
[ 3.990216] [drm] enabling PCIE gen 2 link speeds, disable with radeon.pcie_gen2=0
[ 3.994579] radeon 0000:01:00.0: WB enabled
[ 3.994581] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000080000c00 and cpu addr 0x (ptrval)
[ 3.994582] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000080000c0c and cpu addr 0x (ptrval)
[ 3.994978] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x0000000000072118 and cpu addr 0x (ptrval)
[ 3.994980] radeon 0000:01:00.0: radeon: MSI limited to 32-bit
[ 3.995013] radeon 0000:01:00.0: radeon: using MSI.
[ 3.995048] [drm] radeon: irq initialized.
[ 4.218237] [drm:r600_ring_test [radeon]] *ERROR* radeon: ring 0 test failed (scratch(0x8504)=0xCAFEDEAD)
[ 4.218242] radeon 0000:01:00.0: disabling GPU acceleration
[ 4.236995] [drm] Initialized radeon 2.50.0 20080528 for 0000:01:00.0 on minor 0