Thanks for the comments. Please find attached the requested file (sudo acpidump > acpi.log).
However, "watch -n1 cat /proc/interrupts" did not increase when I used the Fn + F10/F11 (brightness) button. Contrast to that, the (working) volume hotkeys increased the interrupts. I also ran "acpi_listen" and same thing - nothing when brightness hotkeys were pressed, and the correct input with volume hotkeys. ** Attachment added: "acpi.log" https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872311/+attachment/5356489/+files/acpi.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1872311 Title: Brightness hotkeys not working on Lenovo S740 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1872311/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
