Unable to change the screen brightness
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I have an Alienware r3 15 laptop in which I've recently installed Ubuntu 17.10(dual boot with Windows 10). So far everything's fine except that I am unable to find any setting(if any) to change the brightness. There is no brightness slider in the system menu nor anything to change the brightness in "Settings". I tried installing the brightness changer indicator by:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
but it's saying that no backlights were found on my system. I tried changing the backlight from the command line:
sudo echo 100 | sudo tee /sys/class/backlight/*/brightness
tee: '/sys/class/backlight/*/brightness': No such file or directory 100
Please help. The output of sudo lshw -C display on my terminal is:
*-display
description: VGA compatible controller
product: GP106M [GeForce GTX 1060 Mobile]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:125 memory:dc000000-dcffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:e000(size=128) memory:c0000-dffff
*-display
description: Display controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:126 memory:db000000-dbffffff memory:70000000-7fffffff ioport:f000(size=64)
dual-boot laptop brightness backlight alienware
asked Apr 27 at 21:41
Vaibhav Mishra
62
 |Â
show 1 more comment
up vote
1
down vote
favorite
I have an Alienware r3 15 laptop in which I've recently installed Ubuntu 17.10(dual boot with Windows 10). So far everything's fine except that I am unable to find any setting(if any) to change the brightness. There is no brightness slider in the system menu nor anything to change the brightness in "Settings". I tried installing the brightness changer indicator by:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
but it's saying that no backlights were found on my system. I tried changing the backlight from the command line:
sudo echo 100 | sudo tee /sys/class/backlight/*/brightness
tee: '/sys/class/backlight/*/brightness': No such file or directory 100
Please help. The output of sudo lshw -C display on my terminal is:
*-display
description: VGA compatible controller
product: GP106M [GeForce GTX 1060 Mobile]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:125 memory:dc000000-dcffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:e000(size=128) memory:c0000-dffff
*-display
description: Display controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:126 memory:db000000-dbffffff memory:70000000-7fffffff ioport:f000(size=64)
dual-boot laptop brightness backlight alienware
asked Apr 27 at 21:41
Vaibhav Mishra
62
2
Version 17.10 isn't LTS
– Vlad Spirin
Apr 27 at 21:46
See if this article helps: itsfoss.com/fix-brightness-ubuntu-1310
– WinEunuuchs2Unix
May 12 at 17:04
I've seen this article and it didn't help.ls /sys/class/backlight/gives no output on my terminal and I think there is no place in the "Settings" where I can find the graphics card. @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:45
I also didn't try creating the file given in the article because Ubuntu has switched to wayland from xorg in Ubuntu 17.10 @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:47
Wayland might be part of the problem. You can switch to X11 if that is the case.
– WinEunuuchs2Unix
May 12 at 20:51
 |Â
show 1 more comment
up vote
1
down vote
favorite
up vote
1
down vote
favorite
I have an Alienware r3 15 laptop in which I've recently installed Ubuntu 17.10(dual boot with Windows 10). So far everything's fine except that I am unable to find any setting(if any) to change the brightness. There is no brightness slider in the system menu nor anything to change the brightness in "Settings". I tried installing the brightness changer indicator by:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
but it's saying that no backlights were found on my system. I tried changing the backlight from the command line:
sudo echo 100 | sudo tee /sys/class/backlight/*/brightness
tee: '/sys/class/backlight/*/brightness': No such file or directory 100
Please help. The output of sudo lshw -C display on my terminal is:
*-display
description: VGA compatible controller
product: GP106M [GeForce GTX 1060 Mobile]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:125 memory:dc000000-dcffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:e000(size=128) memory:c0000-dffff
*-display
description: Display controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:126 memory:db000000-dbffffff memory:70000000-7fffffff ioport:f000(size=64)
dual-boot laptop brightness backlight alienware
asked Apr 27 at 21:41
Vaibhav Mishra
62
I have an Alienware r3 15 laptop in which I've recently installed Ubuntu 17.10(dual boot with Windows 10). So far everything's fine except that I am unable to find any setting(if any) to change the brightness. There is no brightness slider in the system menu nor anything to change the brightness in "Settings". I tried installing the brightness changer indicator by:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
but it's saying that no backlights were found on my system. I tried changing the backlight from the command line:
sudo echo 100 | sudo tee /sys/class/backlight/*/brightness
tee: '/sys/class/backlight/*/brightness': No such file or directory 100
Please help. The output of sudo lshw -C display on my terminal is:
*-display
description: VGA compatible controller
product: GP106M [GeForce GTX 1060 Mobile]
vendor: NVIDIA Corporation
physical id: 0
bus info: pci@0000:01:00.0
version: a1
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vga_controller bus_master cap_list rom
configuration: driver=nouveau latency=0
resources: irq:125 memory:dc000000-dcffffff memory:b0000000-bfffffff memory:c0000000-c1ffffff ioport:e000(size=128) memory:c0000-dffff
*-display
description: Display controller
product: Intel Corporation
vendor: Intel Corporation
physical id: 2
bus info: pci@0000:00:02.0
version: 04
width: 64 bits
clock: 33MHz
capabilities: pciexpress msi pm bus_master cap_list
configuration: driver=i915 latency=0
resources: irq:126 memory:db000000-dbffffff memory:70000000-7fffffff ioport:f000(size=64)
dual-boot laptop brightness backlight alienware
asked Apr 27 at 21:41
Vaibhav Mishra
62
edited May 13 at 20:32
asked Apr 27 at 21:41
Vaibhav Mishra
62
asked Apr 27 at 21:41
Vaibhav Mishra
62
asked Apr 27 at 21:41
Vaibhav Mishra
62
62
2
Version 17.10 isn't LTS
– Vlad Spirin
Apr 27 at 21:46
See if this article helps: itsfoss.com/fix-brightness-ubuntu-1310
– WinEunuuchs2Unix
May 12 at 17:04
I've seen this article and it didn't help.ls /sys/class/backlight/gives no output on my terminal and I think there is no place in the "Settings" where I can find the graphics card. @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:45
I also didn't try creating the file given in the article because Ubuntu has switched to wayland from xorg in Ubuntu 17.10 @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:47
Wayland might be part of the problem. You can switch to X11 if that is the case.
– WinEunuuchs2Unix
May 12 at 20:51
 |Â
show 1 more comment
2
Version 17.10 isn't LTS
– Vlad Spirin
Apr 27 at 21:46
See if this article helps: itsfoss.com/fix-brightness-ubuntu-1310
– WinEunuuchs2Unix
May 12 at 17:04
I've seen this article and it didn't help.ls /sys/class/backlight/gives no output on my terminal and I think there is no place in the "Settings" where I can find the graphics card. @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:45
I also didn't try creating the file given in the article because Ubuntu has switched to wayland from xorg in Ubuntu 17.10 @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:47
Wayland might be part of the problem. You can switch to X11 if that is the case.
– WinEunuuchs2Unix
May 12 at 20:51
2
2
Version 17.10 isn't LTS
– Vlad Spirin
Apr 27 at 21:46
Version 17.10 isn't LTS
– Vlad Spirin
Apr 27 at 21:46
See if this article helps: itsfoss.com/fix-brightness-ubuntu-1310
– WinEunuuchs2Unix
May 12 at 17:04
See if this article helps: itsfoss.com/fix-brightness-ubuntu-1310
– WinEunuuchs2Unix
May 12 at 17:04
I've seen this article and it didn't help.
ls /sys/class/backlight/ gives no output on my terminal and I think there is no place in the "Settings" where I can find the graphics card. @WinEunuuchs2Unix– Vaibhav Mishra
May 12 at 20:45
I've seen this article and it didn't help.
ls /sys/class/backlight/ gives no output on my terminal and I think there is no place in the "Settings" where I can find the graphics card. @WinEunuuchs2Unix– Vaibhav Mishra
May 12 at 20:45
I also didn't try creating the file given in the article because Ubuntu has switched to wayland from xorg in Ubuntu 17.10 @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:47
I also didn't try creating the file given in the article because Ubuntu has switched to wayland from xorg in Ubuntu 17.10 @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:47
Wayland might be part of the problem. You can switch to X11 if that is the case.
– WinEunuuchs2Unix
May 12 at 20:51
Wayland might be part of the problem. You can switch to X11 if that is the case.
– WinEunuuchs2Unix
May 12 at 20:51
 |Â
show 1 more comment
1 Answer
1
active
oldest
votes
up vote
1
down vote
you can install the brightness changer indicator:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
after launching it should shows on your panel. click it and choose the desired value.
Another way is to do:
echo 1000 | sudo tee /sys/class/backlight/*/brightness
change 1000 to desired value
answered Apr 28 at 0:07
ptetteh227
703115
i installed the brightness indicator but it's saying that no backlights were found on my system and when I tried "echo 1000 | sudo tee /sys/class/backlight/*/brightness" it showed "sudo echo 100 | sudo tee /sys/class/backlight/*/brightness tee: '/sys/class/backlight/*/brightness': No such file or directory 100"
– Vaibhav Mishra
May 2 at 0:19
did the brightness work for an older version of ubuntu?
– ptetteh227
May 2 at 1:14
it didn't but i didn't try fixing it then either.
– Vaibhav Mishra
May 2 at 20:43
post the output ofsudo lshw -C displayin the question.
– ptetteh227
May 2 at 23:58
I have added the output in the question @ptetteh227
– Vaibhav Mishra
May 12 at 16:01
add a comment |Â
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
1
down vote
you can install the brightness changer indicator:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
after launching it should shows on your panel. click it and choose the desired value.
Another way is to do:
echo 1000 | sudo tee /sys/class/backlight/*/brightness
change 1000 to desired value
answered Apr 28 at 0:07
ptetteh227
703115
i installed the brightness indicator but it's saying that no backlights were found on my system and when I tried "echo 1000 | sudo tee /sys/class/backlight/*/brightness" it showed "sudo echo 100 | sudo tee /sys/class/backlight/*/brightness tee: '/sys/class/backlight/*/brightness': No such file or directory 100"
– Vaibhav Mishra
May 2 at 0:19
did the brightness work for an older version of ubuntu?
– ptetteh227
May 2 at 1:14
it didn't but i didn't try fixing it then either.
– Vaibhav Mishra
May 2 at 20:43
post the output ofsudo lshw -C displayin the question.
– ptetteh227
May 2 at 23:58
I have added the output in the question @ptetteh227
– Vaibhav Mishra
May 12 at 16:01
add a comment |Â
up vote
1
down vote
you can install the brightness changer indicator:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
after launching it should shows on your panel. click it and choose the desired value.
Another way is to do:
echo 1000 | sudo tee /sys/class/backlight/*/brightness
change 1000 to desired value
answered Apr 28 at 0:07
ptetteh227
703115
i installed the brightness indicator but it's saying that no backlights were found on my system and when I tried "echo 1000 | sudo tee /sys/class/backlight/*/brightness" it showed "sudo echo 100 | sudo tee /sys/class/backlight/*/brightness tee: '/sys/class/backlight/*/brightness': No such file or directory 100"
– Vaibhav Mishra
May 2 at 0:19
did the brightness work for an older version of ubuntu?
– ptetteh227
May 2 at 1:14
it didn't but i didn't try fixing it then either.
– Vaibhav Mishra
May 2 at 20:43
post the output ofsudo lshw -C displayin the question.
– ptetteh227
May 2 at 23:58
I have added the output in the question @ptetteh227
– Vaibhav Mishra
May 12 at 16:01
add a comment |Â
up vote
1
down vote
up vote
1
down vote
you can install the brightness changer indicator:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
after launching it should shows on your panel. click it and choose the desired value.
Another way is to do:
echo 1000 | sudo tee /sys/class/backlight/*/brightness
change 1000 to desired value
answered Apr 28 at 0:07
ptetteh227
703115
you can install the brightness changer indicator:
sudo add-apt-repository ppa:indicator-brightness/ppa
sudo apt update
sudo apt install indicator-brightness
after launching it should shows on your panel. click it and choose the desired value.
Another way is to do:
echo 1000 | sudo tee /sys/class/backlight/*/brightness
change 1000 to desired value
answered Apr 28 at 0:07
ptetteh227
703115
answered Apr 28 at 0:07
ptetteh227
703115
answered Apr 28 at 0:07
ptetteh227
703115
answered Apr 28 at 0:07
ptetteh227
703115
703115
i installed the brightness indicator but it's saying that no backlights were found on my system and when I tried "echo 1000 | sudo tee /sys/class/backlight/*/brightness" it showed "sudo echo 100 | sudo tee /sys/class/backlight/*/brightness tee: '/sys/class/backlight/*/brightness': No such file or directory 100"
– Vaibhav Mishra
May 2 at 0:19
did the brightness work for an older version of ubuntu?
– ptetteh227
May 2 at 1:14
it didn't but i didn't try fixing it then either.
– Vaibhav Mishra
May 2 at 20:43
post the output ofsudo lshw -C displayin the question.
– ptetteh227
May 2 at 23:58
I have added the output in the question @ptetteh227
– Vaibhav Mishra
May 12 at 16:01
add a comment |Â
i installed the brightness indicator but it's saying that no backlights were found on my system and when I tried "echo 1000 | sudo tee /sys/class/backlight/*/brightness" it showed "sudo echo 100 | sudo tee /sys/class/backlight/*/brightness tee: '/sys/class/backlight/*/brightness': No such file or directory 100"
– Vaibhav Mishra
May 2 at 0:19
did the brightness work for an older version of ubuntu?
– ptetteh227
May 2 at 1:14
it didn't but i didn't try fixing it then either.
– Vaibhav Mishra
May 2 at 20:43
post the output ofsudo lshw -C displayin the question.
– ptetteh227
May 2 at 23:58
I have added the output in the question @ptetteh227
– Vaibhav Mishra
May 12 at 16:01
i installed the brightness indicator but it's saying that no backlights were found on my system and when I tried "echo 1000 | sudo tee /sys/class/backlight/*/brightness" it showed "sudo echo 100 | sudo tee /sys/class/backlight/*/brightness tee: '/sys/class/backlight/*/brightness': No such file or directory 100"
– Vaibhav Mishra
May 2 at 0:19
i installed the brightness indicator but it's saying that no backlights were found on my system and when I tried "echo 1000 | sudo tee /sys/class/backlight/*/brightness" it showed "sudo echo 100 | sudo tee /sys/class/backlight/*/brightness tee: '/sys/class/backlight/*/brightness': No such file or directory 100"
– Vaibhav Mishra
May 2 at 0:19
did the brightness work for an older version of ubuntu?
– ptetteh227
May 2 at 1:14
did the brightness work for an older version of ubuntu?
– ptetteh227
May 2 at 1:14
it didn't but i didn't try fixing it then either.
– Vaibhav Mishra
May 2 at 20:43
it didn't but i didn't try fixing it then either.
– Vaibhav Mishra
May 2 at 20:43
post the output of
sudo lshw -C display in the question.– ptetteh227
May 2 at 23:58
post the output of
sudo lshw -C display in the question.– ptetteh227
May 2 at 23:58
I have added the output in the question @ptetteh227
– Vaibhav Mishra
May 12 at 16:01
I have added the output in the question @ptetteh227
– Vaibhav Mishra
May 12 at 16:01
add a comment |Â
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2
Version 17.10 isn't LTS
– Vlad Spirin
Apr 27 at 21:46
See if this article helps: itsfoss.com/fix-brightness-ubuntu-1310
– WinEunuuchs2Unix
May 12 at 17:04
I've seen this article and it didn't help.
ls /sys/class/backlight/gives no output on my terminal and I think there is no place in the "Settings" where I can find the graphics card. @WinEunuuchs2Unix– Vaibhav Mishra
May 12 at 20:45
I also didn't try creating the file given in the article because Ubuntu has switched to wayland from xorg in Ubuntu 17.10 @WinEunuuchs2Unix
– Vaibhav Mishra
May 12 at 20:47
Wayland might be part of the problem. You can switch to X11 if that is the case.
– WinEunuuchs2Unix
May 12 at 20:51