Thanks to this, I can make Buka and Radiant playable again with this configuration (with normal proportions) : gconftool-2 --set --type int /apps/preenv/Buka/screen_rotation 0 gconftool-2 --set --type int /apps/preenv/Buka/screen_height 480 gconftool-2 --set --type int /apps/preenv/Buka/screen_width 320 gconftool-2 --set --type int /apps/preenv/Radiant/screen_rotation 0 gconftool-2 --set --type int /apps/preenv/Radiant/screen_height 480 gconftool-2 --set --type int /apps/preenv/Radiant/screen_width 320 But sadly, there is a big part of the screen in black. Too bad we cannot set the touch screen region as same as we can set the screen display... Thanks for the help .