[ibm-acpi-devel] Lenovo w540 Unsupported brightness interface, please contact ibm-acpi-devel

Hi, When i boot appears a msg Unsupported brightness interface, please contact ibm-acpi-devel@lists.sourceforge.net. Bios Version: $ sudo dmidecode -s bios-version GNET66WW (2.14 ) Hardware name: LENOVO 20BG001KPG/20BG001KPG, BIOS GNET66WW (2.14 ) 07/02/2014 I check dmesg: $ dmesg | grep ac

[ibm-acpi-devel] Lenovo w540 Unsupported brightness interface, please contact ibm-acpi-devel

Hi, When i boot appears a msg Unsupported brightness interface, please contact ibm-acpi-devel@lists.sourceforge.net. Bios Version: $ sudo dmidecode -s bios-version GNET66WW (2.14 ) Hardware name: LENOVO 20BG001KPG/20BG001KPG, BIOS GNET66WW (2.14 ) 07/02/2014 I check dmesg: $ dmesg | grep ac