[Expired for linux (Ubuntu) because there has been no activity for 60
days.]
** Changed in: linux (Ubuntu)
Status: Incomplete => Expired
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Sorry for the late reply.
Can you try 18.04? Without any "acpi_osi=" parameter of course...
Also, please ask the vendor which device should control the brightness?
I can see the PEGP's _BCM method reference to GFX0's _BCM, maybe it can
only be called on GFX0 directly?
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This is the acpidump. I added "acpi_osi=Linux" for recomendations. But
now it not set.
Thanks
** Attachment added: "acpidump"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1751887/+attachment/5126610/+files/acpidump.txt
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Can you attach acpidump? Thanks!
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https://bugs.launchpad.net/bugs/1751887
Title:
The brightness of the screen cannot be adjusted with either the
buttons or the slider.
Also, do you add "acpi_osi=Linux" for any reason?
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Title:
The brightness of the screen cannot be adjusted with either the
buttons
No, /sys/class/backlight/acpi_video0/brightness doesn't change after
user xrandr. This value only change when with I move the brightness
slider at the right top of screen.
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Does /sys/class/backlight/acpi_video0/brightness change after you use
xrandr to change the brightness?
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https://bugs.launchpad.net/bugs/1751887
Title:
The brightness of
I tried a lot of thing. Please see this topic for see the list that
things than doesn't work
https://askubuntu.com/questions/1010405/the-brightness-of-laptop-screen-
cannot-be-adjusted-with-either-the-buttons-or-th/1011557
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Try kernel parameter "acpi_backlight=video" and "acpi_backlight=vendor"
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https://bugs.launchpad.net/bugs/1751887
Title:
The brightness of the screen cannot be adjusted
No
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https://bugs.launchpad.net/bugs/1751887
Title:
The brightness of the screen cannot be adjusted with either the
buttons or the slider.
Status in linux package in
So does the issue get solved?
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https://bugs.launchpad.net/bugs/1751887
Title:
The brightness of the screen cannot be adjusted with either the
buttons or the slider.
I've got installed nvidia drivers
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https://bugs.launchpad.net/bugs/1751887
Title:
The brightness of the screen cannot be adjusted with either the
buttons or the slider.
I think you need to install nvidia driver:
$ sudo ubuntu-drivers auto install
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Title:
The brightness of the screen cannot be
More info on Askubuntu
https://askubuntu.com/questions/1010405/the-brightness-of-laptop-screen-
cannot-be-adjusted-with-either-the-buttons-or-th/1011557
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This is the ouput @kaihengfeng
$ find /sys/class/backlight
/sys/class/backlight
/sys/class/backlight/acpi_video0
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Title:
The
What's the output of `find /sys/class/backlight`?
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Title:
The brightness of the screen cannot be adjusted with either the
buttons
I used a nvidia propietary driver, but also doesn't work. In this
askubuntu I'm tested multiples things, without success
https://askubuntu.com/questions/1010405/the-brightness-of-laptop-screen-
cannot-be-adjusted-with-either-the-buttons-or-th/1010420#1010420
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The graphic card is "GeForce GTX 1060 Mobile", which I don't think
nouveau has good support (yet).
Try to use proprietary Nvidia driver.
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Bug exist on Kernel Upstream mainline
** Tags added: kernel-bug-exists-upstream
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https://bugs.launchpad.net/bugs/1751887
Title:
The brightness of the screen cannot be
Did this issue start happening after an update/upgrade? Was there a
prior kernel version where you were not having this particular problem?
Would it be possible for you to test the latest upstream kernel? Refer
to https://wiki.ubuntu.com/KernelMainlineBuilds . Please test the latest
v4.16
sudo lspci -vnvn > lspci-vnvn.log
** Attachment added: "lspci"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1751887/+attachment/5063792/+files/lspci-vnvn.log
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