Hi, the kernel startup message tells me to contact you. I'm sorry if this is is already known (a quick search of the mailinglist for T550 didn't find anything related). I'm running Debian Stretch on this Lenovo. For me everything is working regarding the brightness and keyboard lights but I get this message on startup. > [ 7.704439] thinkpad_acpi: ThinkPad ACPI Extras v0.25 > [ 7.704441] thinkpad_acpi: http://ibm-acpi.sf.net/ > [ 7.704442] thinkpad_acpi: ThinkPad BIOS N11ET34W (1.10 ), EC unknown > [ 7.704443] thinkpad_acpi: Lenovo ThinkPad T550, model 20CKCTO1WW > [ 7.705067] thinkpad_acpi: Unsupported brightness interface, please > contact ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx > [ 7.705115] thinkpad_acpi: radio switch found; radios are enabled > [ 7.705196] thinkpad_acpi: This ThinkPad has standard ACPI > backlight brightness control, supported by the ACPI video driver > [ 7.705198] thinkpad_acpi: Disabling thinkpad-acpi brightness > events by default... Regards Christian ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785231&iu=/4140 _______________________________________________ ibm-acpi-devel mailing list ibm-acpi-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/ibm-acpi-devel
