resolusi udah solved
udah bisa pake 1280x1024


kyknya emg driver fglrx nya ng beres atau ng cocok kali

ane ksh tips nya mana tau ada kejadian kyk ane
install firmware linux nonfree
lalu reinstall libgl1-mesa-glx libgl1-mesa-dri xserver-xorg-core
xserver-xorg-ati

nanti vga langsung detect otomatis di debian
contoh punya ane Gallium 0.4 on AMD TURKS

lalu buat konfiguras xorg.conf
ane buat kyk gini
Section "Device"
    Identifier     "Radeon HD 6670"
    Driver         "radeon"
EndSection

Section "Monitor"
    Identifier    "VGA-0"
    Modeline    "1280x1024_60.00"  109.00  1280 1368 1496 1712  1024 1027
1034 1063 -hsync +vsync
    Option        "PreferredMode"    "1280x1024_60.00"
EndSection

Section "Screen"
    Identifier    "VGA-0"
    Device        "radeon"
    DefaultDepth    24
    SubSection "Display"
        Depth    24
        Modes    "1280x1024" "1024x768"
    EndSubSection
EndSection

Section "ServerLayout"
    Identifier    "Default Layout"
    Screen        "VGA-0"
EndSection


restart dan viola udah bisa pake res 1280x1024
render 3d pun bisa lancarr :D

(kernel yang ane pake 3.2.0.2-AMD64)
pake debian testing/sid