On my xps m1330 with the last updates, function keys for brightness increased two time in the same time.
Here the lshal -m:
Start monitoring devicelist:
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14:33:39.269: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up
14:33:39.271: computer_logicaldev_input_1 condition ButtonPressed = brightness-up
14:33:39.271: computer_logicaldev_input condition ButtonPressed = brightness-up
14:33:39.443: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up
14:33:40.457: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up
14:33:40.475: computer_logicaldev_input_1 condition ButtonPressed = brightness-up
14:33:40.475: computer_logicaldev_input condition ButtonPressed = brightness-up
14:33:40.647: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up
14:33:41.301: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up
14:33:41.306: computer_logicaldev_input_1 condition ButtonPressed = brightness-up
14:33:41.306: computer_logicaldev_input condition ButtonPressed = brightness-up
14:33:41.494: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-up
14:33:42.071: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down
14:33:42.071: computer_logicaldev_input_1 condition ButtonPressed = brightness-down
14:33:42.071: computer_logicaldev_input condition ButtonPressed = brightness-down
14:33:42.256: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down
14:33:42.701: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down
14:33:42.706: computer_logicaldev_input_1 condition ButtonPressed = brightness-down
14:33:42.708: computer_logicaldev_input condition ButtonPressed = brightness-down
14:33:42.888: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down
14:33:43.133: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down
14:33:43.138: computer_logicaldev_input_1 condition ButtonPressed = brightness-down
14:33:43.141: computer_logicaldev_input condition ButtonPressed = brightness-down
14:33:43.350: platform_i8042_i8042_KBD_port_logicaldev_input condition ButtonPressed = brightness-down
14:33:47.015: computer_power_supply_battery_BAT0 property battery.voltage.current = 12494 (0x30ce)
