Ja das müsste schon der ganz normale radeon-Treiber sein, aber ich find mich in der Xorg.0.log nicht wirklich zurecht. Bin eben kein intimer Kenner der Materie. Ich kopier hier mal einen Teil rein:
(II) VESA: driver for VESA chipsets: vesa
(II) FBDEV: driver for framebuffer: fbdev
(II) Primary Device is: PCI 01@00:05:0
(II) [KMS] Kernel modesetting enabled.
(WW) Falling back to old probe method for vesa
(WW) Falling back to old probe method for fbdev
(II) Loading sub module "fbdevhw"
(II) LoadModule: "fbdevhw"
(II) Loading /usr/lib/xorg/modules/linux/libfbdevhw.so
(II) Module fbdevhw: vendor="X.Org Foundation"
compiled for 1.7.6, module version = 0.0.2
ABI class: X.Org Video Driver, version 6.0
(II) RADEON(0): Creating default Display subsection in Screen section
"Default Screen Section" for depth/fbbpp 24/32
(==) 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 XPRESS 200M 5A62 (PCIE)" (ChipID = 0x5a62)
(II) RADEON(0): PCI card detected
(II) RADEON(0): KMS Color Tiling: disabled
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 8, (OK)
drmOpenByBusid: Searching for BusID pci:0000:01:05.0
drmOpenDevice: node name is /dev/dri/card0
drmOpenDevice: open result is 8, (OK)
drmOpenByBusid: drmOpenMinor returns 8
drmOpenByBusid: drmGetBusid reports pci:0000:01:05.0
(II) RADEON(0): Output VGA-0 has no monitor section
(II) RADEON(0): Output LVDS has no monitor section
(II) RADEON(0): EDID for output VGA-0
(II) RADEON(0): Not using default mode "640x350" (vrefresh out of range)
(II) RADEON(0): Not using default mode "320x175" (doublescan mode not supported)
...
...die ellenlange Liste von nicht infrage kommenden Auflösungen hab ich rausgeworfen
....
(II) RADEON(0): Printing probed modes for output VGA-0
(II) RADEON(0): Modeline "1360x768"x59.8 84.75 1360 1432 1568 1776 768 771 781 798 -hsync +vsync (47.7 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 "848x480"x60.0 33.75 848 864 976 1088 480 486 494 517 +hsync +vsync (31.0 kHz)
(II) RADEON(0): Modeline "640x480"x59.9 25.18 640 656 752 800 480 489 492 525 -hsync -vsync (31.5 kHz)
(II) RADEON(0): Modeline "640x480"x59.9 25.18 640 656 752 800 480 490 492 525 -hsync -vsync (31.5 kHz)
(II) RADEON(0): EDID for output LVDS
(II) RADEON(0): Manufacturer: SEC Model: 4142 Serial#: 0
(II) RADEON(0): Year: 2006 Week: 0
(II) RADEON(0): EDID Version: 1.3
(II) RADEON(0): Digital Display Input
(II) RADEON(0): Max Image Size [cm]: horiz.: 30 vert.: 19
(II) RADEON(0): Gamma: 2.20
(II) RADEON(0): No DPMS capabilities specified
(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: 0.580 redY: 0.340 greenX: 0.310 greenY: 0.550
(II) RADEON(0): blueX: 0.155 blueY: 0.155 whiteX: 0.313 whiteY: 0.329
(II) RADEON(0): Manufacturer's mask: 0
(II) RADEON(0): Supported detailed timing:
(II) RADEON(0): clock: 68.9 MHz Image Size: 303 x 190 mm
(II) RADEON(0): h_active: 1280 h_sync: 1292 h_sync_end 1356 h_blank_end 1408 h_border: 0
(II) RADEON(0): v_active: 800 v_sync: 803 v_sync_end 806 v_blanking: 816 v_border: 0
(II) RADEON(0): Unknown vendor-specific block f
(II) RADEON(0): SAMSUNG
(II) RADEON(0): LTN141W1-L06
(II) RADEON(0): EDID (in hex):
...
...
(II) RADEON(0): Printing probed modes for output LVDS
(II) RADEON(0): Modeline "1280x800"x60.0 68.94 1280 1292 1356 1408 800 803 806 816 -hsync -vsync (49.0 kHz)
(II) RADEON(0): Modeline "1280x720"x59.9 74.50 1280 1344 1472 1664 720 723 728 748 -hsync +vsync (44.8 kHz)
(II) RADEON(0): Modeline "1152x768"x59.8 71.75 1152 1216 1328 1504 768 771 781 798 -hsync +vsync (47.7 kHz)
(II) RADEON(0): Modeline "1024x768"x59.9 63.50 1024 1072 1176 1328 768 771 775 798 -hsync +vsync (47.8 kHz)
(II) RADEON(0): Modeline "800x600"x59.9 38.25 800 832 912 1024 600 603 607 624 -hsync +vsync (37.4 kHz)
(II) RADEON(0): Modeline "848x480"x59.7 31.50 848 872 952 1056 480 483 493 500 -hsync +vsync (29.8 kHz)
(II) RADEON(0): Modeline "720x480"x59.7 26.75 720 744 808 896 480 483 493 500 -hsync +vsync (29.9 kHz)
(II) RADEON(0): Modeline "640x480"x59.4 23.75 640 664 720 800 480 483 487 500 -hsync +vsync (29.7 kHz)
...
...
Der Witz ist, daß wenn ich so tue als ob ich einen externen Monitor (LVDS) angeschlossen hätte und das Häckchen bei "Gleiches Bild auf allen Bildschirmen" entferne, den Bildschirm "Laptop" wähle, dann kann ich die Auflösung 1280x800 problemlos darstellen. Nur sind dann alle Desktop-Dateien auf den vermeintlich angeschlossenen Externmonitor verschoben und die Grafikkarte sinnlos zusätzlich belastet.