平衡点

_ acpi_i2c

良く見たら起動時に

[   20.349502] acpi_i2c: module license 'unspecified' taints kernel.
[   20.350863] Disabling lock debugging due to kernel taint
[   20.352269] acpi_i2c: Unknown symbol i2c_new_device (err 0)
[   20.353566] acpi_i2c: Unknown symbol acpi_dev_get_resources (err 0)
[   20.354847] acpi_i2c: Unknown symbol acpi_dev_resource_interrupt (err 0)
[   20.356238] acpi_i2c: Unknown symbol acpi_dev_free_resource_list (err 0)

となってた.

...はて?