Bug 106869 - Backlight does not work on a MacBookAir3,2
Summary: Backlight does not work on a MacBookAir3,2
Status: NEW
Alias: None
Product: libbacklight
Classification: Unclassified
Component: general (show other bugs)
Version: unspecified
Hardware: All Linux (All)
: medium normal
Assignee: Matthew Garrett
QA Contact:
Depends on:
Reported: 2018-06-09 11:33 UTC by victor
Modified: 2018-06-11 09:34 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

grep -r . /proc/acpi > acpi (561 bytes, text/plain)
2018-06-09 11:35 UTC, victor
sudo acpidump -o acpidump.txt (124.35 KB, text/plain)
2018-06-09 11:36 UTC, victor
sudo fwts > fwts (210.27 KB, text/x-log)
2018-06-09 11:37 UTC, victor
sudo fwts method > fwts_method (50.44 KB, text/x-log)
2018-06-09 11:38 UTC, victor
sudo dmidecode > dmidecode.log (12.78 KB, text/x-log)
2018-06-09 11:38 UTC, victor

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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