Bug 152091

Summary: ASUS X450LCP brighness hot keys aren't working
Product: Drivers Reporter: Marcos Souza (marcos.souza.org)
Component: Video(Other)Assignee: platform_x86_64 (platform_x86_64)
Status: RESOLVED INVALID    
Severity: normal CC: marcos.souza.org
Priority: P1    
Hardware: All   
OS: Linux   
Kernel Version: Since 4.3 Subsystem:
Regression: No Bisected commit-id:
Attachments: DMI info
dmesg.log
Parameters and /sys/class/backlight entries

Description Marcos Souza 2016-08-12 02:24:19 UTC 
Created attachment 228451 [details]
DMI info

After trying to follow instructions from http://hansdegoede.livejournal.com/13889.html, I could check it didn't worked.

The only kernel parameter that made it work was "acpi_osi=".

I tried to try different parameters, but none of them worked. When using "acpi_osi=", /sys/class/backlight had two acpi_video0 entries:
[marcos@xfiles ~]$ ls /sys/class/backlight/
acpi_video0  acpi_video1  intel_backlight

There is something or someplace I should take a look in the source code?

Thanks!
Comment 1 Marcos Souza 2016-08-12 02:29:19 UTC 
Created attachment 228461 [details]
dmesg.log
Comment 2 Marcos Souza 2016-08-12 02:37:22 UTC 
Created attachment 228471 [details]
Parameters and /sys/class/backlight entries
Comment 3 Marcos Souza 2016-08-12 02:48:05 UTC 
Some additional info:

When using "acpi_osi=", evemu-record with Asus WMI hotkeys, showing KEY_BRIGHTNESSUP/DOWN, so, it worked great with this parameter.
Comment 5 Jani Nikula 2016-08-16 11:36:45 UTC 
Please file new drm/i915 bugs at https://bugs.freedesktop.org/enter_bug.cgi?product=DRI&component=DRM/Intel
Comment 6 Marcos Souza 2016-08-16 15:57:15 UTC 
New bug created: https://bugs.freedesktop.org/show_bug.cgi?id=97368