Hello, I've noticed the radeon driver changes following the last patch (4.7.99.16-4.7.99.17.diff.bz2). Thanks for having taken into account my proposals.
Here is another list of Radeon cards which should be supported by the radeon driver. I suspect all the entries marked as Secondary can be ignored, because the primary head will do the job from XFree86's point of view. 0x1002 0x3151 "ATI|M24 [FireMV 2400]" 0x1002 0x3171 "ATI|M24 [FireMV 2400] (Secondary)" 0x1002 0x3e70 "ATI|RV380 [Radeon X600] (Secondary)" 0x1002 0x4164 "ATI|R300 AD [Radeon 9500 Pro] (Secondary)" 0x1002 0x4165 "ATI|R300 AE [Radeon 9700 Pro] (Secondary)" 0x1002 0x4166 "ATI|R300 AF [Radeon 9700 Pro] (Secondary)" 0x1002 0x4168 "ATI|Radeon R350 [Radeon 9800] (Secondary)" 0x1002 0x4170 "ATI|RV350 AP [Radeon 9600] (Secondary)" 0x1002 0x4171 "ATI|RV350 AQ [Radeon 9600] (Secondary)" 0x1002 0x4172 "ATI|RV350 AR [Radeon 9600] (Secondary)" 0x1002 0x4173 "ATI|RV350 AS [Radeon 9550] (Secondary)" 0x1002 0x496e "ATI|Radeon RV250 [Radeon 9000] (Secondary)" 0x1002 0x4a69 "ATI|R420 [Radeon X800 PRO/GTO] (Secondary)" 0x1002 0x4a6a "ATI|R420 [Radeon X800] (Secondary)" 0x1002 0x4a6b "ATI|R420 [Radeon X800] (Secondary)" 0x1002 0x4a70 "ATI|R420 [X800XT-PE] (Secondary)" 0x1002 0x4a74 "ATI|R420 [Radeon X800 VE] (Secondary)" 0x1002 0x4b48 "ATI|Radeon X850 Consumer (R481)" 0x1002 0x4b69 "ATI|R480 [Radeon X850XT] (Secondary)" 0x1002 0x4b6b "ATI|R480 [Radeon X850Pro] (Secondary)" 0x1002 0x4b6c "ATI|R481 [Radeon X850XT-PE] (Secondary)" 0x1002 0x4c6e "ATI|Radeon RV250 Ln [Radeon Mobility 9000 M9] (Secondary)" 0x1002 0x4e64 "ATI|Radeon R300 [Radeon 9700 Pro] (Secondary)" 0x1002 0x4e65 "ATI|Radeon R300 [Radeon 9500 Pro] (Secondary)" 0x1002 0x4e66 "ATI|RV350 NF [Radeon 9600] (Secondary)" 0x1002 0x4e67 "ATI|Radeon R300 [FireGL X1] (Secondary)" 0x1002 0x4e68 "ATI|Radeon R350 [Radeon 9800 Pro] (Secondary)" 0x1002 0x4e69 "ATI|Radeon R350 [Radeon 9800] (Secondary)" 0x1002 0x4e6a "ATI|RV350 NJ [Radeon 9800 XT] (Secondary)" 0x1002 0x4e71 "ATI|M10 NQ [Radeon Mobility 9600] (Secondary)" 0x1002 0x4f72 "ATI|RV250 [Radeon 9000 Series]" 0x1002 0x4f73 "ATI|Radeon RV250 [Radeon 9000 Series] (Secondary)" 0x1002 0x5154 "ATI|R200 QT [Radeon 8500]" 0x1002 0x5155 "ATI|R200 QU [Radeon 9100]" 0x1002 0x515f "ATI|ES1000" 0x1002 0x5461 "ATI|M22 [Mobility Radeon X300]" 0x1002 0x5555 "ATI|R430 GL PRO" 0x1002 0x5569 "ATI|R423 UI [Radeon X800PRO (PCIE)] (Secondary)" 0x1002 0x556b "ATI|Radeon R423 UK (PCIE) [X800 SE] (Secondary)" 0x1002 0x556d "ATI|R430 [Radeon X800 XL] (PCIe) (Secondary)" 0x1002 0x556f "ATI|R430 [Radeon X800] (PCIE) (Secondary)" 0x1002 0x5571 "ATI|R423GL-SE [FireGL V5100 (PCIE)] (Secondary)" 0x1002 0x5657 "ATI|Radeon X550/X700 Series (RV410) 0x1002 0x5854 "ATI|Radeon Xpress Series (RS480)" 0x1002 0x5874 "ATI|Radeon Xpress Series (RS482)" 0x1002 0x5940 "ATI|RV280 [Radeon 9200 PRO] (Secondary)" 0x1002 0x5941 "ATI|RV280 [Radeon 9200] (Secondary)" 0x1002 0x5944 "ATI|RV280 [Radeon 9200 SE (PCI)]" 0x1002 0x5a43 "ATI|Radeon Xpress Series (RS400)" 0x1002 0x5a63 "ATI|Radeon Xpress Series (RC410)" 0x1002 0x5b66 "ATI|RV370X (RV370)" 0x1002 0x5b70 "ATI|RV370 [Radeon X300SE]" 0x1002 0x5b72 "ATI|RV380 [Radeon X600]" 0x1002 0x5b73 "ATI|RV370 secondary [Sapphire X550 Silent]" 0x1002 0x5b74 "ATI|RV370 5B64 [FireGL V3100 (PCIE)] (Secondary)" 0x1002 0x5d44 "ATI|RV280 [Radeon 9200 SE] (Secondary)" 0x1002 0x5d45 "ATI|RV280 [FireMV 2200 PCI] (secondary)" 0x1002 0x5d51 "ATI|R480 GL 12P (R480)" 0x1002 0x5d6d "ATI|R480 [Radeon X850XT Platinum (PCIE)] (Secondary)" 0x1002 0x5d6f "ATI|R480 [Radeon X800 GTO (PCIE)] (Secondary)" 0x1002 0x5d72 "ATI|R480 [Radeon X850XT (PCIE)] (Secondary)" 0x1002 0x5d77 "ATI|R423 5F57 [Radeon X800XT (PCIE)] (Secondary)" 0x1002 0x5e49 "ATI|RV410 [FireGL V3300]" 0x1002 0x5e6b "ATI|RV410 [Radeon X700 Pro (PCIE)] (Secondary)" 0x1002 0x5e6d "ATI|RV410 [Radeon X700 (PCIE)] (Secondary)" 0x1002 0x5f57 "ATI|R423 [Radeon X800XT (PCIE)]" 0x1002 0x7c37 "ATI|RV350 AQ [Radeon 9600 SE]" 0x103c 0x31fb "HP|DL365 ATI ES1000 VGA controller" Loïc Mahé - Toulouse, France