egrep thinkpad dmesg

[    9.731921] thinkpad_acpi: ThinkPad ACPI Extras v0.25
[    9.731930] thinkpad_acpi: http://ibm-acpi.sf.net/
[    9.731934] thinkpad_acpi: ThinkPad BIOS HSET56WW (2.01 ), EC unknown
[    9.731937] thinkpad_acpi: Lenovo ThinkPad Edge E145, model 20BC0000MZ
[    9.776184] thinkpad_acpi: Unsupported brightness interface, please contact ibm-acpi-devel@lists.sourceforge.net
[    9.838127] thinkpad_acpi: radio switch found; radios are enabled
[    9.838162] thinkpad_acpi: possible tablet mode switch found; ThinkPad in laptop mode
[    9.838197] thinkpad_acpi: This ThinkPad has standard ACPI backlight brightness control, supported by the ACPI video driver
[    9.838200] thinkpad_acpi: Disabling thinkpad-acpi brightness events by default...
[    9.936033] thinkpad_acpi: rfkill switch tpacpi_bluetooth_sw: radio is unblocked
[   10.001383] thinkpad_acpi: Console audio control enabled, mode: monitor (read only)
[   10.123400] input: ThinkPad Extra Buttons as /devices/platform/thinkpad_acpi/input/input14