Thanks Neil! This method works fine. I hope someday somebody will fix
it. In any case, I'll leave it here:
Step 1: Fire a terminal (Obviously)
Step 2: Finding the correct module.
Run the following command:
$ ls /sys/class/backlight/
This should list down two modules:
acpi_video0 and
This appears to be quite an old issue with Optimus graphics. For me the
workaround was to pass specific kernel parameters at boot time to inhibit acpi
control of the backlight but allow intel_backlight control
I followed the instructions at
my laptop also has a graphics card with optimus
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https://bugs.launchpad.net/bugs/1724933
Title:
I can't adjust display brightness
Status in xorg package in
I have the same problem using an ASPIRE 5750G-9463, using Optimus.
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https://bugs.launchpad.net/bugs/1724933
Title:
I can't adjust display brightness
Status in
I found that the brightness controls (via function key or sliders in power
management) were changing the values in
/sys/class/backlight/acpi_videos0/brightness, but nothing changed in
/sys/class/backlight/intel_backlight/brightness.
When I edited the value in
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: xorg (Ubuntu)
Status: New => Confirmed
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in X.org session adjustment not working
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Touch seeded packages, which is subscribed to xorg in Ubuntu.
https://bugs.launchpad.net/bugs/1724933
Title:
I can't adjust display brightness
Status in xorg package in Ubuntu:
in Unity session, the adjustment works fine
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https://bugs.launchpad.net/bugs/1724933
Title:
I can't adjust display brightness
Status in xorg package in
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