Bug 106869

Summary: Backlight does not work on a MacBookAir3,2
Product: libbacklight Reporter: victor <vicgarpe>
Component: generalAssignee: Matthew Garrett <mjg59>
Status: NEW --- QA Contact:
Severity: normal    
Priority: medium CC: kai.heng.feng
Version: unspecified   
Hardware: All   
OS: Linux (All)   
Whiteboard:
i915 platform: i915 features:
Attachments: grep -r . /proc/acpi > acpi
sudo acpidump -o acpidump.txt
sudo fwts > fwts
sudo fwts method > fwts_method
sudo dmidecode > dmidecode.log

Description victor 2018-06-09 11:33:50 UTC 
Backlight control does not work and there are no entries in /sys/class/backlight. When I boot my system with the option GRUB_CMDLINE_LINUX_DEFAULT="acpi_backlight=vendor" I can change the brightness with the command xrandr on a terminal.

I attach all the system information about this problem.


ls /sys/class/backlight > (it's void)

grep -r . /proc/acpi > acpi

sudo acpidump -o acpidump.txt

sudo fwts > fwts

sudo fwts method > fwts_method

sudo dmidecode > dmidecode.log
Comment 1 victor 2018-06-09 11:35:26 UTC 
Created attachment 140104 [details]
grep -r . /proc/acpi > acpi
Comment 2 victor 2018-06-09 11:36:20 UTC 
Created attachment 140105 [details]
sudo acpidump -o acpidump.txt
Comment 3 victor 2018-06-09 11:37:31 UTC 
Created attachment 140106 [details]
sudo fwts > fwts
Comment 4 victor 2018-06-09 11:38:08 UTC 
Created attachment 140107 [details]
sudo fwts method > fwts_method
Comment 5 victor 2018-06-09 11:38:45 UTC 
Created attachment 140108 [details]
sudo dmidecode > dmidecode.log

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