Ubuntu KDE on Acer Aspire 7740 - No Brightness fn-key
I have researched this question going back about 8 years and couldn't find a satisfactory answer. Bottom line, the brightness keys do not work on the Aspire 7740 with KDE Plasma. I am sure this has been an annoyance for many owners of the fine laptop if they want to use Linux on it.
If I do
$: ls /sys/class/backlight the result is:
$: video0 acer_wmi intel_backlight
So, I added the acpi_backlight=vendor kernel parameter to /etc/default/grub after the quiet splash resulting in quiet splash acpi_backlight=vendor.
After this, I did
sudo update-grub
I rebooted into graphical desktop again, reran ls /sys/class/backlight and the result was that the video0 was gone leaving acer_wmi and intel_backlight. The Fn brightness keys still didn't work. So, I blacklisted the acer_wmi module by adding the it to the /etc/modprobe.d/blacklist.conf file:
blacklist acer_wmi
(at the end)
I rebooted again to X, and voilà... the Fn keys work for brightness.
I think this could certainly help any who were frustrated by this (as I was).
Yet, I am not sure of the purpose of the acer_wmi module.
Do I need it for something?
kde brightness acer backlight
edited 39 mins ago
zx485
1,47131115
asked 2 hours ago
penguinpoopenguinpoo
61
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I have researched this question going back about 8 years and couldn't find a satisfactory answer. Bottom line, the brightness keys do not work on the Aspire 7740 with KDE Plasma. I am sure this has been an annoyance for many owners of the fine laptop if they want to use Linux on it.
If I do
$: ls /sys/class/backlight the result is:
$: video0 acer_wmi intel_backlight
So, I added the acpi_backlight=vendor kernel parameter to /etc/default/grub after the quiet splash resulting in quiet splash acpi_backlight=vendor.
After this, I did
sudo update-grub
I rebooted into graphical desktop again, reran ls /sys/class/backlight and the result was that the video0 was gone leaving acer_wmi and intel_backlight. The Fn brightness keys still didn't work. So, I blacklisted the acer_wmi module by adding the it to the /etc/modprobe.d/blacklist.conf file:
blacklist acer_wmi
(at the end)
I rebooted again to X, and voilà... the Fn keys work for brightness.
I think this could certainly help any who were frustrated by this (as I was).
Yet, I am not sure of the purpose of the acer_wmi module.
Do I need it for something?
kde brightness acer backlight
edited 39 mins ago
zx485
1,47131115
asked 2 hours ago
penguinpoopenguinpoo
61
New contributor
penguinpoo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
add a comment |
I have researched this question going back about 8 years and couldn't find a satisfactory answer. Bottom line, the brightness keys do not work on the Aspire 7740 with KDE Plasma. I am sure this has been an annoyance for many owners of the fine laptop if they want to use Linux on it.
If I do
$: ls /sys/class/backlight the result is:
$: video0 acer_wmi intel_backlight
So, I added the acpi_backlight=vendor kernel parameter to /etc/default/grub after the quiet splash resulting in quiet splash acpi_backlight=vendor.
After this, I did
sudo update-grub
I rebooted into graphical desktop again, reran ls /sys/class/backlight and the result was that the video0 was gone leaving acer_wmi and intel_backlight. The Fn brightness keys still didn't work. So, I blacklisted the acer_wmi module by adding the it to the /etc/modprobe.d/blacklist.conf file:
blacklist acer_wmi
(at the end)
I rebooted again to X, and voilà... the Fn keys work for brightness.
I think this could certainly help any who were frustrated by this (as I was).
Yet, I am not sure of the purpose of the acer_wmi module.
Do I need it for something?
kde brightness acer backlight
edited 39 mins ago
zx485
1,47131115
asked 2 hours ago
penguinpoopenguinpoo
61
New contributor
penguinpoo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
I have researched this question going back about 8 years and couldn't find a satisfactory answer. Bottom line, the brightness keys do not work on the Aspire 7740 with KDE Plasma. I am sure this has been an annoyance for many owners of the fine laptop if they want to use Linux on it.
If I do
$: ls /sys/class/backlight the result is:
$: video0 acer_wmi intel_backlight
So, I added the acpi_backlight=vendor kernel parameter to /etc/default/grub after the quiet splash resulting in quiet splash acpi_backlight=vendor.
After this, I did
sudo update-grub
I rebooted into graphical desktop again, reran ls /sys/class/backlight and the result was that the video0 was gone leaving acer_wmi and intel_backlight. The Fn brightness keys still didn't work. So, I blacklisted the acer_wmi module by adding the it to the /etc/modprobe.d/blacklist.conf file:
blacklist acer_wmi
(at the end)
I rebooted again to X, and voilà... the Fn keys work for brightness.
I think this could certainly help any who were frustrated by this (as I was).
Yet, I am not sure of the purpose of the acer_wmi module.
Do I need it for something?
kde brightness acer backlight
kde brightness acer backlight
edited 39 mins ago
zx485
1,47131115
asked 2 hours ago
penguinpoopenguinpoo
61
New contributor
penguinpoo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 39 mins ago
zx485
1,47131115
asked 2 hours ago
penguinpoopenguinpoo
61
New contributor
penguinpoo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited 39 mins ago
zx485
1,47131115
edited 39 mins ago
zx485
1,47131115
edited 39 mins ago
zx485
1,47131115
1,47131115
asked 2 hours ago
penguinpoopenguinpoo
61
New contributor
penguinpoo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
asked 2 hours ago
penguinpoopenguinpoo
61
asked 2 hours ago
penguinpoopenguinpoo
61
61
New contributor
penguinpoo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
penguinpoo is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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