If ACPI approach is used, there are also two different approaches used - ACPI standard or OEM-specific .
ACPI defines events from brightness up and down, and it is video/brightnessdown BRTDN 00000087 & video/brightnessup BRTUP 00000086. The can be checked by running "acpi_listen" and pressing brightness hotkeys. If OEM-specific events are used, it should be handled by platform driver like "ideapad_laptop". Would you mind sharing acpidump log (sudo acpidump > acpi.log) so more analysis can be performed? -- 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 [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
