Hi here is the code i was advice to send : ov 21 18:06:41 laurent kernel: [ 1.604307] [drm] Clocks initialized ! Nov 21 18:06:41 laurent kernel: [ 1.604327] radeon 0000:01:00.0: VRAM: 1024M 0x00000000 - 0x3FFFFFFF (1024M used) Nov 21 18:06:41 laurent kernel: [ 1.604330] radeon 0000:01:00.0: GTT: 512M 0x40000000 - 0x5FFFFFFF Nov 21 18:06:41 laurent kernel: [ 1.604357] mtrr: no more MTRRs available Nov 21 18:06:41 laurent kernel: [ 1.604359] [drm] Detected VRAM RAM=1024M, BAR=256M Nov 21 18:06:41 laurent kernel: [ 1.604361] [drm] RAM width 128bits DDR Nov 21 18:06:41 laurent kernel: [ 1.604482] [TTM] Zone kernel: Available graphics memory: 1926148 kiB. Nov 21 18:06:41 laurent kernel: [ 1.604487] [TTM] Initializing pool allocator. Nov 21 18:06:41 laurent kernel: [ 1.604518] [drm] radeon: 1024M of VRAM memory ready Nov 21 18:06:41 laurent kernel: [ 1.604522] [drm] radeon: 512M of GTT memory ready. Nov 21 18:06:41 laurent kernel: [ 1.604621] radeon 0000:01:00.0: radeon: using MSI. Nov 21 18:06:41 laurent kernel: [ 1.604677] [drm] radeon: irq initialized. Nov 21 18:06:41 laurent kernel: [ 1.604680] [drm] GART: num cpu pages 131072, num gpu pages 131072 Nov 21 18:06:41 laurent kernel: [ 1.605705] [drm] Loading REDWOOD Microcode Nov 21 18:06:41 laurent kernel: [ 1.608488] hub 1-1:1.0: USB hub found Nov 21 18:06:41 laurent kernel: [ 1.608636] hub 1-1:1.0: 6 ports detected Nov 21 18:06:41 laurent kernel: [ 1.623275] i915 0000:00:02.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16 Nov 21 18:06:41 laurent kernel: [ 1.629907] [drm] ring test succeeded in 1 usecs Nov 21 18:06:41 laurent kernel: [ 1.630041] [drm] radeon: ib pool ready. Nov 21 18:06:41 laurent kernel: [ 1.630150] [drm] ib test succeeded in 0 usecs Nov 21 18:06:41 laurent kernel: [ 1.630886] [drm] Radeon Display Connectors Nov 21 18:06:41 laurent kernel: [ 1.630888] [drm] Connector 0: Nov 21 18:06:41 laurent kernel: [ 1.630889] [drm] LVDS Nov 21 18:06:41 laurent kernel: [ 1.630891] [drm] DDC: 0x6560 0x6560 0x6564 0x6564 0x6568 0x6568 0x656c 0x656c Nov 21 18:06:41 laurent kernel: [ 1.630893] [drm] Encoders: Nov 21 18:06:41 laurent kernel: [ 1.630895] [drm] LCD1: INTERNAL_UNIPHY Nov 21 18:06:41 laurent kernel: [ 1.630896] [drm] Connector 1: Nov 21 18:06:41 laurent kernel: [ 1.630897] [drm] HDMI-A Nov 21 18:06:41 laurent kernel: [ 1.630898] [drm] HPD1 Nov 21 18:06:41 laurent kernel: [ 1.630900] [drm] DDC: 0x6430 0x6430 0x6434 0x6434 0x6438 0x6438 0x643c 0x643c Nov 21 18:06:41 laurent kernel: [ 1.630902] [drm] Encoders: Nov 21 18:06:41 laurent kernel: [ 1.630903] [drm] DFP1: INTERNAL_UNIPHY1 Nov 21 18:06:41 laurent kernel: [ 1.630904] [drm] Connector 2: Nov 21 18:06:41 laurent kernel: [ 1.630906] [drm] VGA Nov 21 18:06:41 laurent kernel: [ 1.630907] [drm] DDC: no ddc bus - possible BIOS bug - please report to <a href="mailto:xorg-driver-ati@lists.x.org">xorg-driver-ati@lists.x.org</a> Nov 21 18:06:41 laurent kernel: [ 1.630908] [drm] Encoders: Nov 21 18:06:41 laurent kernel: [ 1.630910] [drm] CRT1: INTERNAL_KLDSCP_DAC1 Nov 21 18:06:41 laurent kernel: [ 1.678441] mtrr: no more MTRRs available Nov 21 18:06:41 laurent kernel: [ 1.678444] [drm] MTRR allocation failed. Graphics performance may suffer. Nov 21 18:06:41 laurent kernel: [ 1.678564] [drm] set up 31M of stolen space Nov 21 18:06:41 laurent kernel: [ 1.678912] vga_switcheroo: enabled Nov 21 18:06:41 laurent kernel: [ 1.679045] radeon atpx: version is 1 Nov 21 18:06:41 laurent kernel: [ 1.794897] usb 2-1: new high speed USB device using ehci_hcd and address 2 Nov 21 18:06:41 laurent kernel: [ 1.795004] vgaarb: device changed decodes: PCI:0000:01:00.0,olddecodes=io+mem,decodes=none:owns=none Nov 21 18:06:41 laurent kernel: [ 1.795011] vgaarb: device changed decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=none:owns=io+mem Nov 21 18:06:41 laurent kernel: [ 1.868007] [drm] Internal thermal controller without fan control Nov 21 18:06:41 laurent kernel: [ 1.868024] [drm] radeon: power management initialized please tell if you need more