I support the conclusion by Marcel. I have HP 450 G6 and brightness up/down generate the same scancode as mic mute.
Also, in dmesg I get: [ 6.422405] hp_wmi: query 0x4 returned error 0x5 [ 6.433681] hp_wmi: query 0x4 returned error 0x5 [ 6.447825] hp_wmi: query 0xd returned error 0x5 [ 6.617355] hp_wmi: query 0x1b returned error 0x5 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1806681 Title: hp_wmi: query 0xd returned error 0x5 To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1806681/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
