|Summary:||Backlight brightness media keys are not working on Lenovo B570e (although backlight brightness can be controlled via intel_backlight)|
|Product:||Base System||Reporter:||Michael Danilov <mike.d.ft402>|
|Component:||kern||Assignee:||freebsd-bugs mailing list <bugs>|
|Severity:||Affects Only Me||CC:||0mp, emaste|
Description Michael Danilov 2018-04-30 12:46:25 UTC
Created attachment 192927 [details] Verbose boot dmesg. I'm aware that to control backlight you have to use graphics/intel-backlight (is there any chance to see this exposed to sysctl in the future without needing this kludge?) -- and it works if I bind it to some window manager keys. However, I can not use the brightness keys via window manager nor devd, because they generate no events at all. I have tried loading different acpi_* kernel modules, and none of them work.
Comment 1 Michael Danilov 2018-04-30 12:50:20 UTC
This has always been the case, since version 9, and I have not used any earlier version.
Comment 2 Michael Danilov 2018-04-30 12:50:53 UTC
Created attachment 192928 [details] ACPI errors These errors show up at random, are they relevant?
Comment 3 Michael Danilov 2018-04-30 16:27:01 UTC
I forgot to add: brightness works up until the kernel is loader. And the brightness set by intel-backlight does not survive suspend restore -- it is reset to the pre-kernel setting.
Comment 4 Michael Danilov 2018-04-30 16:27:18 UTC