desktop ~ $ dmesg | grep drm
[    4.062519] [drm] Initialized drm 1.1.0 20060810
[    4.253969] [drm] radeon defaulting to kernel modesetting.
[    4.253973] [drm] radeon kernel modesetting enabled.
[    4.254273] [drm] initializing kernel modesetting (RS780 0x1002:0x9610 0x1458:0xD000).
[    4.254294] [drm] register mmio base: 0xFDFE0000
[    4.254295] [drm] register mmio size: 65536
[    4.255422] [drm] Detected VRAM RAM=256M, BAR=256M
[    4.255425] [drm] RAM width 32bits DDR
[    4.255532] [drm] radeon: 256M of VRAM memory ready
[    4.255534] [drm] radeon: 512M of GTT memory ready.
[    4.255551] [drm] Supports vblank timestamp caching Rev 1 (10.10.2010).
[    4.255552] [drm] Driver supports precise vblank timestamp query.
[    4.255568] [drm] radeon: irq initialized.
[    4.255573] [drm] GART: num cpu pages 131072, num gpu pages 131072
[    4.256240] [drm] Loading RS780 Microcode
[    4.261527] [drm] PCIE GART of 512M enabled (table at 0x00000000C0040000).
[    4.292979] [drm] ring test succeeded in 1 usecs
[    4.293090] [drm] radeon: ib pool ready.
[    4.293149] [drm] ib test succeeded in 0 usecs
[    4.293732] [drm] Radeon Display Connectors
[    4.293734] [drm] Connector 0:
[    4.293735] [drm]   VGA
[    4.293738] [drm]   DDC: 0x7e40 0x7e40 0x7e44 0x7e44 0x7e48 0x7e48 0x7e4c 0x7e4c
[    4.293739] [drm]   Encoders:
[    4.293740] [drm]     CRT1: INTERNAL_KLDSCP_DAC1
[    4.293742] [drm] Connector 1:
[    4.293743] [drm]   DVI-D
[    4.293744] [drm]   HPD1
[    4.293746] [drm]   DDC: 0x7e50 0x7e50 0x7e54 0x7e54 0x7e58 0x7e58 0x7e5c 0x7e5c
[    4.293747] [drm]   Encoders:
[    4.293748] [drm]     DFP1: INTERNAL_KLDSCP_LVTMA
[    4.293772] [drm] radeon: power management initialized
[    4.362898] [drm] fb mappable at 0xD0142000
[    4.362900] [drm] vram apper at 0xD0000000
[    4.362901] [drm] size 5324800
[    4.362902] [drm] fb depth is 24
[    4.362904] [drm]    pitch is 5888
[    4.362980] fbcon: radeondrmfb (fb0) is primary device
[    4.394303] fb0: radeondrmfb frame buffer device
[    4.394304] drm: registered panic notifier
[    4.394309] [drm] Initialized radeon 2.12.0 20080528 for 0000:01:05.0 on minor 0