The issue could be reproduced on Lenovo E450, CID 201408-15790 with 14.04.2 (utopic) Lenovo E550, CID 201411-16167 with 14.04.2 (utopic)
$ acpi_listen
button/wlan WLAN 00000080 00000000 K
The issue could be reproduced on
Lenovo E450, CID 201408-15790 with 14.04.2 (utopic)
Lenovo E550, CID 201411-16167 with 14.04.2 (utopic)
$ acpi_listen
button/wlan WLAN 00000080 00000000 K