Comment 35 for bug 89853

Maybe we should just patch xserver-xorg.postinst script to always use on Radeon Mobility X1400 cards, like there already is such lines for other cards ? for example such code could be added in xresprobeint() function of xserver-xorg.postinst script:

    if [ "$DEVICE_DRIVER" = "vesa" ]; then
      if [ "$DISPLAY_TYPE" = "lcd/lvds" ]; then
        if [ "$DEVICE_IDENTIFIER" = "ATI Technologies, Inc. Radeon Mobility X1400" ] || \
           echo "$DEVICE_IDENTIFIER" | grep -q "Radeon Mobility X1400"; then
          MONITOR_SYNC_RANGES="yes"
          debug_echo "Radeon Mobility X1400 laptop chipset detected; writing sync ranges"
        fi
      fi
    fi

I can test and attach such patch if Ubuntu developers will accept my patch.