dmesg | egrep 'drm|radeon'
[ 1.229662] [drm] Initialized
[ 1.259778] [drm] radeon kernel modesetting enabled.
[ 1.264872] fb: switching to radeondrmfb from VESA VGA
[ 1.265146] [drm] initializing kernel modesetting (JUNIPER 0x1002:0x68B8 0x1787:0x2288 0x00).
[ 1.265154] [drm] register mmio base: 0xFDDC0000
[ 1.265155] [drm] register mmio size: 131072
[ 1.265263] radeon 0000:01:00.0: VRAM: 1024M 0x0000000000000000 - 0x000000003FFFFFFF (1024M used)
[ 1.265265] radeon 0000:01:00.0: GTT: 1024M 0x0000000040000000 - 0x000000007FFFFFFF
[ 1.265267] [drm] Detected VRAM RAM=1024M, BAR=256M
[ 1.265267] [drm] RAM width 128bits DDR
[ 1.265322] [drm] radeon: 1024M of VRAM memory ready
[ 1.265323] [drm] radeon: 1024M of GTT memory ready.
[ 1.265329] [drm] Loading JUNIPER Microcode
[ 1.265387] [drm] Internal thermal controller with fan control
[ 1.287677] [drm] radeon: dpm initialized
[ 1.287741] [drm] GART: num cpu pages 262144, num gpu pages 262144
[ 1.305053] [drm] PCIE GART of 1024M enabled (table at 0x000000000014C000).
[ 1.305139] radeon 0000:01:00.0: WB enabled
[ 1.305142] radeon 0000:01:00.0: fence driver on ring 0 use gpu addr 0x0000000040000c00 and cpu addr 0xffff9ade62bc7c00
[ 1.305143] radeon 0000:01:00.0: fence driver on ring 3 use gpu addr 0x0000000040000c0c and cpu addr 0xffff9ade62bc7c0c
[ 1.305508] radeon 0000:01:00.0: fence driver on ring 5 use gpu addr 0x000000000005c418 and cpu addr 0xffffbc2280e1c418
[ 1.305509] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 1.305509] [drm] Driver supports precise vblank timestamp query.
[ 1.305511] radeon 0000:01:00.0: radeon: MSI limited to 32-bit
[ 1.305550] radeon 0000:01:00.0: radeon: using MSI.
[ 1.305569] [drm] radeon: irq initialized.
[ 1.322044] [drm] ring test on 0 succeeded in 0 usecs
[ 1.322049] [drm] ring test on 3 succeeded in 2 usecs
[ 1.517595] [drm] ring test on 5 succeeded in 1 usecs
[ 1.517601] [drm] UVD initialized successfully.
[ 1.517823] [drm] ib test on ring 0 succeeded in 0 usecs
[ 1.517842] [drm] ib test on ring 3 succeeded in 0 usecs
[ 1.687585] [drm] ib test on ring 5 succeeded
[ 1.688819] [drm] Radeon Display Connectors
[ 1.688820] [drm] Connector 0:
[ 1.688820] [drm] DP-1
[ 1.688821] [drm] HPD4
[ 1.688822] [drm] DDC: 0x6440 0x6440 0x6444 0x6444 0x6448 0x6448 0x644c 0x644c
[ 1.688822] [drm] Encoders:
[ 1.688823] [drm] DFP1: INTERNAL_UNIPHY2
[ 1.688824] [drm] Connector 1:
[ 1.688824] [drm] HDMI-A-1
[ 1.688825] [drm] HPD5
[ 1.688825] [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c
[ 1.688826] [drm] Encoders:
[ 1.688826] [drm] DFP2: INTERNAL_UNIPHY2
[ 1.688827] [drm] Connector 2:
[ 1.688827] [drm] DVI-I-1
[ 1.688828] [drm] HPD1
[ 1.688829] [drm] DDC: 0x6460 0x6460 0x6464 0x6464 0x6468 0x6468 0x646c 0x646c
[ 1.688829] [drm] Encoders:
[ 1.688829] [drm] DFP3: INTERNAL_UNIPHY1
[ 1.688830] [drm] CRT2: INTERNAL_KLDSCP_DAC2
[ 1.688831] [drm] Connector 3:
[ 1.688831] [drm] DVI-I-2
[ 1.688831] [drm] HPD6
[ 1.688832] [drm] DDC: 0x6450 0x6450 0x6454 0x6454 0x6458 0x6458 0x645c 0x645c
[ 1.688833] [drm] Encoders:
[ 1.688833] [drm] DFP4: INTERNAL_UNIPHY
[ 1.688834] [drm] CRT1: INTERNAL_KLDSCP_DAC1
[ 1.778462] [drm] fb mappable at 0xD034D000
[ 1.778464] [drm] vram apper at 0xD0000000
[ 1.778464] [drm] size 5242880
[ 1.778465] [drm] fb depth is 24
[ 1.778465] [drm] pitch is 5120
[ 1.778533] fbcon: radeondrmfb (fb0) is primary device
[ 1.778638] radeon 0000:01:00.0: fb0: radeondrmfb frame buffer device
[ 1.792122] [drm] Initialized radeon 2.49.0 20080528 for 0000:01:00.0 on minor 0