Bonjour,
Après m’être arraché les cheveux pendant 3 jours 
je m’en remets à vous !
Je présente le problème, je suis sur une nouvelle install’ de Squeeze, tout se passe à merveille.
J’ai une CG intégrée (RADEON HD 4250). Les pilotes libres Radeon sont tout ce dont j’ai besoin (les proprios, ma carte les aime pas).
Problème, lorsque je souhaite faire du dual view avec ma TV (sortie HDMI) bah, l’écran 2 (donc la TV) reste désespéremment noire.
J’ai beau jouer avec xrandr, ajouter des résolutions (que ma TV prend en charge), rien n’y fait, l’écran est noir. (mais détecté puisque la télé me dit qu’elle est bien en 720p lorsque j’allume l’écran).
Voici ce que dit un “xrandr”:
Screen 0: minimum 320 x 200, current 3200 x 1080, maximum 8192 x 8192
VGA-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 477mm x 268mm
1920x1080 60.0*+
1600x1200 60.0
1680x1050 60.0
1280x1024 60.0
1440x900 59.9
1280x960 60.0
1280x800 59.8
1024x768 60.0
800x600 60.3 56.2
640x480 60.0
HDMI-0 connected 1280x720+1920+0 (normal left inverted right x axis y axis) 820mm x 460mm
1280x720 50.0*+ 60.0
Mon Xorg.0.log (grep RADEON)
II) RADEON: Driver for ATI Radeon chipsets:
ATI Mobility RADEON HD 4850, ATI Mobility RADEON HD 4850 X2,
ATI Mobility RADEON HD 4870, ATI Mobility RADEON M98,
ATI Mobility RADEON HD 4870, ATI Radeon 4800 Series,
ATI RV730XT [Radeon HD 4670], ATI RADEON E4600,
ATI Mobility Radeon HD 2400, ATI RADEON E2400, ATI RV610,
(II) RADEON(0): Creating default Display subsection in Screen section
(==) RADEON(0): Depth 24, (--) framebuffer bpp 32
(II) RADEON(0): Pixel depth = 24 bits stored in 4 bytes (32 bpp pixmaps)
(==) RADEON(0): Default visual is TrueColor
(==) RADEON(0): RGB weight 888
(II) RADEON(0): Using 8 bits per RGB (8 bit DAC)
(--) RADEON(0): Chipset: "ATI Radeon HD 4290" (ChipID = 0x9715)
(II) RADEON(0): PCI card detected
(WW) RADEON(0): Color tiling is not yet supported on R600/R700
(II) RADEON(0): KMS Color Tiling: disabled
(II) RADEON(0): Output VGA-0 has no monitor section
(II) RADEON(0): Output HDMI-0 has no monitor section
(II) RADEON(0): EDID for output VGA-0
(II) RADEON(0): Manufacturer: SAM Model: 593 Serial#: 1297691186
(II) RADEON(0): Year: 2010 Week: 9
(II) RADEON(0): EDID Version: 1.3
(II) RADEON(0): Analog Display Input, Input Voltage Level: 0.700/0.300 V
(II) RADEON(0): Sync: Separate Composite SyncOnGreen
(II) RADEON(0): Max Image Size [cm]: horiz.: 48 vert.: 27
(II) RADEON(0): Gamma: 2.20
(II) RADEON(0): DPMS capabilities: Off; RGB/Color Display
(II) RADEON(0): First detailed timing is preferred mode
(II) RADEON(0): redX: 0.649 redY: 0.335 greenX: 0.283 greenY: 0.605
(II) RADEON(0): blueX: 0.151 blueY: 0.073 whiteX: 0.312 whiteY: 0.329
(II) RADEON(0): Supported established timings:
(II) RADEON(0): 640x480@60Hz
(II) RADEON(0): 800x600@56Hz
(II) RADEON(0): 800x600@60Hz
(II) RADEON(0): 1024x768@60Hz
(II) RADEON(0): Manufacturer's mask: 0
(II) RADEON(0): Supported standard timings:
(II) RADEON(0): #0: hsize: 1280 vsize 800 refresh: 60 vid: 129
(II) RADEON(0): #1: hsize: 1280 vsize 960 refresh: 60 vid: 16513
(II) RADEON(0): #2: hsize: 1280 vsize 1024 refresh: 60 vid: 32897
(II) RADEON(0): #3: hsize: 1440 vsize 900 refresh: 60 vid: 149
(II) RADEON(0): #4: hsize: 1680 vsize 1050 refresh: 60 vid: 179
(II) RADEON(0): #5: hsize: 1600 vsize 1200 refresh: 60 vid: 16553
(II) RADEON(0): Supported detailed timing:
(II) RADEON(0): clock: 148.5 MHz Image Size: 477 x 268 mm
(II) RADEON(0): h_active: 1920 h_sync: 2008 h_sync_end 2052 h_blank_end 2200 h_border: 0
(II) RADEON(0): v_active: 1080 v_sync: 1084 v_sync_end 1089 v_blanking: 1125 v_border: 0
(II) RADEON(0): Ranges: V min: 56 V max: 61 Hz, H min: 30 H max: 75 kHz, PixClock max 175 MHz
(II) RADEON(0): Monitor name: SyncMaster
(II) RADEON(0): Serial No: HMJZ300788
(II) RADEON(0): EDID (in hex):
(II) RADEON(0): 00ffffffffffff004c2d93053232594d
(II) RADEON(0): 091401030e301b782a78f1a655489b26
(II) RADEON(0): 1250542308008100814081809500b300
(II) RADEON(0): a94001010101023a801871382d40582c
(II) RADEON(0): 4500dd0c1100001e000000fd00383d1e
(II) RADEON(0): 4b11000a202020202020000000fc0053
(II) RADEON(0): 796e634d61737465720a2020000000ff
(II) RADEON(0): 00484d4a5a3330303738380a2020007d
(II) RADEON(0): EDID vendor "SAM", prod id 1427
(II) RADEON(0): Using EDID range info for horizontal sync
(II) RADEON(0): Using EDID range info for vertical refresh
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1920x1080"x0.0 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync (67.5 kHz)
(II) RADEON(0): Modeline "800x600"x0.0 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz)
(II) RADEON(0): Modeline "800x600"x0.0 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync (35.2 kHz)
(II) RADEON(0): Modeline "640x480"x0.0 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz)
(II) RADEON(0): Modeline "1024x768"x0.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz)
(II) RADEON(0): Modeline "1280x800"x0.0 83.50 1280 1352 1480 1680 800 803 809 831 -hsync +vsync (49.7 kHz)
(II) RADEON(0): Modeline "1280x960"x0.0 108.00 1280 1376 1488 1800 960 961 964 1000 +hsync +vsync (60.0 kHz)
(II) RADEON(0): Modeline "1280x1024"x0.0 108.00 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync (64.0 kHz)
(II) RADEON(0): Modeline "1440x900"x0.0 106.50 1440 1520 1672 1904 900 903 909 934 -hsync +vsync (55.9 kHz)
(II) RADEON(0): Modeline "1680x1050"x0.0 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync (65.3 kHz)
(II) RADEON(0): Modeline "1600x1200"x0.0 162.00 1600 1664 1856 2160 1200 1201 1204 1250 +hsync +vsync (75.0 kHz)
(II) RADEON(0): Printing probed modes for output VGA-0
(II) RADEON(0): Modeline "1920x1080"x60.0 148.50 1920 2008 2052 2200 1080 1084 1089 1125 +hsync +vsync (67.5 kHz)
(II) RADEON(0): Modeline "1600x1200"x60.0 162.00 1600 1664 1856 2160 1200 1201 1204 1250 +hsync +vsync (75.0 kHz)
(II) RADEON(0): Modeline "1680x1050"x60.0 146.25 1680 1784 1960 2240 1050 1053 1059 1089 -hsync +vsync (65.3 kHz)
(II) RADEON(0): Modeline "1280x1024"x60.0 108.00 1280 1328 1440 1688 1024 1025 1028 1066 +hsync +vsync (64.0 kHz)
(II) RADEON(0): Modeline "1440x900"x59.9 106.50 1440 1520 1672 1904 900 903 909 934 -hsync +vsync (55.9 kHz)
(II) RADEON(0): Modeline "1280x960"x60.0 108.00 1280 1376 1488 1800 960 961 964 1000 +hsync +vsync (60.0 kHz)
(II) RADEON(0): Modeline "1280x800"x59.8 83.50 1280 1352 1480 1680 800 803 809 831 +hsync -vsync (49.7 kHz)
(II) RADEON(0): Modeline "1024x768"x60.0 65.00 1024 1048 1184 1344 768 771 777 806 -hsync -vsync (48.4 kHz)
(II) RADEON(0): Modeline "800x600"x60.3 40.00 800 840 968 1056 600 601 605 628 +hsync +vsync (37.9 kHz)
(II) RADEON(0): Modeline "800x600"x56.2 36.00 800 824 896 1024 600 601 603 625 +hsync +vsync (35.2 kHz)
(II) RADEON(0): Modeline "640x480"x60.0 25.20 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz)
(II) RADEON(0): EDID for output HDMI-0
(II) RADEON(0): Manufacturer: SHP Model: 1008 Serial#: 0
(II) RADEON(0): Year: 2007 Week: 255
(II) RADEON(0): EDID Version: 1.3
(II) RADEON(0): Digital Display Input
(II) RADEON(0): Max Image Size [cm]: horiz.: 82 vert.: 46
(II) RADEON(0): Gamma: 2.20
(II) RADEON(0): DPMS capabilities: Off
(II) RADEON(0): Supported color encodings: RGB 4:4:4 YCrCb 4:4:4
(II) RADEON(0): First detailed timing is preferred mode
(II) RADEON(0): redX: 0.633 redY: 0.333 greenX: 0.205 greenY: 0.702
(II) RADEON(0): blueX: 0.150 blueY: 0.081 whiteX: 0.292 whiteY: 0.322
(II) RADEON(0): Manufacturer's mask: 0
(II) RADEON(0): Supported detailed timing:
(II) RADEON(0): clock: 74.2 MHz Image Size: 820 x 460 mm
(II) RADEON(0): h_active: 1280 h_sync: 1720 h_sync_end 1760 h_blank_end 1980 h_border: 0
(II) RADEON(0): v_active: 720 v_sync: 725 v_sync_end 730 v_blanking: 750 v_border: 0
(II) RADEON(0): Supported detailed timing:
(II) RADEON(0): clock: 74.2 MHz Image Size: 820 x 460 mm
(II) RADEON(0): h_active: 1280 h_sync: 1390 h_sync_end 1430 h_blank_end 1650 h_border: 0
(II) RADEON(0): v_active: 720 v_sync: 725 v_sync_end 730 v_blanking: 750 v_border: 0
(II) RADEON(0): Monitor name: SHARP HDMI
(II) RADEON(0): Ranges: V min: 49 V max: 61 Hz, H min: 15 H max: 46 kHz, PixClock max 85 MHz
(II) RADEON(0): Number of EDID sections to follow: 1
(II) RADEON(0): EDID (in hex):
(II) RADEON(0): 00ffffffffffff004d10081000000000
(II) RADEON(0): ff11010380522e782a1bbea25534b326
(II) RADEON(0): 144a5200000001010101010101010101
(II) RADEON(0): 010101010101011d00bc52d01e20b828
(II) RADEON(0): 554034cc3100001e011d007251d01e20
(II) RADEON(0): 6e28550034cc3100001e000000fc0053
(II) RADEON(0): 484152502048444d490a2020000000fd
(II) RADEON(0): 00313d0f2e08000a2020202020200196
(II) RADEON(0): Not using mode "1920x540" (interlace mode not supported)
(II) RADEON(0): Not using mode "1920x540" (interlace mode not supported)
(II) RADEON(0): Printing probed modes for output HDMI-0
(II) RADEON(0): Modeline "1280x720"x50.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x60.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): Output VGA-0 connected
(II) RADEON(0): Output HDMI-0 connected
(II) RADEON(0): Using sloppy heuristic for initial modes
(II) RADEON(0): Output VGA-0 using initial mode 1920x1080
(II) RADEON(0): Output HDMI-0 using initial mode 1280x720
(II) RADEON(0): Using default gamma of (1.0, 1.0, 1.0) unless otherwise stated.
(II) RADEON(0): mem size init: gart size :1fdff000 vram size: s:10000000 visible:f7d7000
(II) RADEON(0): EXA: Driver will allow EXA pixmaps in VRAM
(**) RADEON(0): Display dimensions: (480, 270) mm
(**) RADEON(0): DPI set to (101, 101)
(II) RADEON(0): [DRI2] Setup complete
(II) RADEON(0): Front buffer size: 8704K
(II) RADEON(0): VRAM usage limit set to 220575K
(==) RADEON(0): Backing store disabled
(II) RADEON(0): Direct rendering enabled
(II) RADEON(0): Setting EXA maxPitchBytes
(II) RADEON(0): Acceleration enabled
(==) RADEON(0): DPMS enabled
(==) RADEON(0): Silken mouse enabled
(II) RADEON(0): Set up textured video
(II) RADEON(0): RandR 1.2 enabled, ignore the following RandR disabled message.
(II) RADEON(0): Setting screen physical size to 508 x 285
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): Allocate new frame buffer 3200x1088 stride 3200
(II) RADEON(0): VRAM usage limit set to 216169K
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
(II) RADEON(0): EDID vendor "SHP", prod id 4104
(II) RADEON(0): Using hsync ranges from config file
(II) RADEON(0): Using vrefresh ranges from config file
(II) RADEON(0): Printing DDC gathered Modelines:
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1720 1760 1980 720 725 730 750 +hsync +vsync (37.5 kHz)
(II) RADEON(0): Modeline "1280x720"x0.0 74.25 1280 1390 1430 1650 720 725 730 750 +hsync +vsync (45.0 kHz)
Je ne trouve rien, tout est bien détecté et le bureau est bien étendu. (Je le vois lorsque j’active le cube Compiz, je me retrouve avec 8 faces)
Et même si je désactive Compiz, même chose.
Autre chose, j’ai essayé de ne brancher que la sortie HDMI au démarrage du PC, je vois bien le lancement, BIOS, GRUB, etc… Puis au moment de charger les modules, pouf plus rien.
Je n’ai pas envie de jouer avec un xorg.conf (je n’en ai pas et n’en veux pas… sauf si… 
)
Merci d’avance.
