Настройка Xorg.conf

xorg.conf в LXDE так же надо настраивать в ручную - особое внимание стоит уделить Section "InputDevice"
Дело в том, что Arch Linux перешел на драйвер evdev

$sudo pacman -S xf86-input-evdev

теперь онастроим этот раздел в xorg.conf

Section "InputDevice"
Identifier "Keyboard0"
Driver "evdev"
Option "Device" "/dev/input/event1"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us,ru"
Option "XkbVariant" ",winkeys"
Option "CoreKeyboard" "true"
Option "XkbOptions" "grp:alt_shift_toggle"
EndSection

раскладка меняется по alt+shift, 2 раскладки us, rus
-------------------------------
Полный мой xorg.conf

Section "ServerLayout"
Identifier "X.org Configured"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"
EndSection

Section "Files"
ModulePath "/usr/lib/xorg/modules"
FontPath "/usr/share/fonts/misc"
FontPath "/usr/share/fonts/100dpi:unscaled"
FontPath "/usr/share/fonts/75dpi:unscaled"
FontPath "/usr/share/fonts/TTF"
FontPath "/usr/share/fonts/Type1"
EndSection

Section "Module"
Load "dri"
Load "extmod"
Load "xtrap"
Load "glx"
Load "dbe"
Load "freetype"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "evdev"
Option "Device" "/dev/input/event1"
Option "XkbRules" "xorg"
Option "XkbModel" "pc105"
Option "XkbLayout" "us,ru"
Option "XkbVariant" ",winkeys"
Option "CoreKeyboard" "true"
Option "XkbOptions" "grp:alt_shift_toggle"
EndSection

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5 6 7"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "Monitor Model"
EndSection

Section "Device"
Identifier "Card0"
Driver "radeon"
VendorName "ATI Technologies Inc"
BoardName "R430 [Radeon X800 XL] (PCIe)"
BusID "PCI:2:0:0"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Card0"
Monitor "Monitor0"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "1280x1024_60" "1024x768_60" "800x600_60"
EndSubSection
EndSection

для просмотра видео и серфинга нета, более чем достаточно