Brightness control not available in ubuntu 14.04 acer veriton desktop
I have just installed ubuntu 14.04 on acer veriton desktop and can not reduce the screen brightness.
Below is a screen shot of the 'brightness and lock' settings. Unfortunately it does not show any control for brightness.
I have tried several things I gathered from similar questions on this forum, but none works.
1) Using the command xrandr --output LVDS1 --brightness 0.5 gives the output :
`warning: output LVDS1 not found; ignoring`
xrandr: Need crtc to set gamma on.
2) I tried creating a file /usr/share/X11/xorg.conf.d/20ntel.conf with contents :
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
3) The folder /sys/class/backlight/ does not have any contents
4) In /etc/defaul/grub I have the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Sadly it looks like I am very unfortunate, none of the above solutions is working. I would really appreciate any help. Thanks.
14.04 brightness
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
asked Aug 10 '15 at 16:57
user90041
1162
add a comment |
I have just installed ubuntu 14.04 on acer veriton desktop and can not reduce the screen brightness.
Below is a screen shot of the 'brightness and lock' settings. Unfortunately it does not show any control for brightness.
I have tried several things I gathered from similar questions on this forum, but none works.
1) Using the command xrandr --output LVDS1 --brightness 0.5 gives the output :
`warning: output LVDS1 not found; ignoring`
xrandr: Need crtc to set gamma on.
2) I tried creating a file /usr/share/X11/xorg.conf.d/20ntel.conf with contents :
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
3) The folder /sys/class/backlight/ does not have any contents
4) In /etc/defaul/grub I have the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Sadly it looks like I am very unfortunate, none of the above solutions is working. I would really appreciate any help. Thanks.
14.04 brightness
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
asked Aug 10 '15 at 16:57
user90041
1162
Please edit your question and add output oflspci -k | grep -EA2 'VGA|3D'terminal command.
– Pilot6
Aug 10 '15 at 19:35
add a comment |
I have just installed ubuntu 14.04 on acer veriton desktop and can not reduce the screen brightness.
Below is a screen shot of the 'brightness and lock' settings. Unfortunately it does not show any control for brightness.
I have tried several things I gathered from similar questions on this forum, but none works.
1) Using the command xrandr --output LVDS1 --brightness 0.5 gives the output :
`warning: output LVDS1 not found; ignoring`
xrandr: Need crtc to set gamma on.
2) I tried creating a file /usr/share/X11/xorg.conf.d/20ntel.conf with contents :
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
3) The folder /sys/class/backlight/ does not have any contents
4) In /etc/defaul/grub I have the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Sadly it looks like I am very unfortunate, none of the above solutions is working. I would really appreciate any help. Thanks.
14.04 brightness
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
asked Aug 10 '15 at 16:57
user90041
1162
I have just installed ubuntu 14.04 on acer veriton desktop and can not reduce the screen brightness.
Below is a screen shot of the 'brightness and lock' settings. Unfortunately it does not show any control for brightness.
I have tried several things I gathered from similar questions on this forum, but none works.
1) Using the command xrandr --output LVDS1 --brightness 0.5 gives the output :
`warning: output LVDS1 not found; ignoring`
xrandr: Need crtc to set gamma on.
2) I tried creating a file /usr/share/X11/xorg.conf.d/20ntel.conf with contents :
Section "Device"
Identifier "card0"
Driver "intel"
Option "Backlight" "intel_backlight"
BusID "PCI:0:2:0"
EndSection
3) The folder /sys/class/backlight/ does not have any contents
4) In /etc/defaul/grub I have the line GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
Sadly it looks like I am very unfortunate, none of the above solutions is working. I would really appreciate any help. Thanks.
14.04 brightness
14.04 brightness
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
asked Aug 10 '15 at 16:57
user90041
1162
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
asked Aug 10 '15 at 16:57
user90041
1162
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
edited Aug 10 '15 at 17:14
Prashant Chikhalkar
1,53211221
1,53211221
asked Aug 10 '15 at 16:57
user90041
1162
asked Aug 10 '15 at 16:57
user90041
1162
asked Aug 10 '15 at 16:57
user90041
1162
1162
Please edit your question and add output oflspci -k | grep -EA2 'VGA|3D'terminal command.
– Pilot6
Aug 10 '15 at 19:35
add a comment |
Please edit your question and add output oflspci -k | grep -EA2 'VGA|3D'terminal command.
– Pilot6
Aug 10 '15 at 19:35
Please edit your question and add output of
lspci -k | grep -EA2 'VGA|3D' terminal command.– Pilot6
Aug 10 '15 at 19:35
Please edit your question and add output of
lspci -k | grep -EA2 'VGA|3D' terminal command.– Pilot6
Aug 10 '15 at 19:35
add a comment |
1 Answer
1
active
oldest
votes
command is not perfectly written..
I was having same problem too.. and sufferd a lot
this used to give me same error to - xrandr --output LVDS1 --brightness 0.5
bt after searching .. i found out lvds1 is not the proper way to write
right way is LVDS-1
this name u can find by running xrandr without any parameters :
hense use this
xrandr --output LVDS-1 --brightness 0.5
edited Dec 24 at 21:55
waltinator
21.9k74169
answered Dec 24 at 19:19
resis10ce
1
New contributor
resis10ce 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 |
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "89"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: true,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: 10,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f659836%2fbrightness-control-not-available-in-ubuntu-14-04-acer-veriton-desktop%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
command is not perfectly written..
I was having same problem too.. and sufferd a lot
this used to give me same error to - xrandr --output LVDS1 --brightness 0.5
bt after searching .. i found out lvds1 is not the proper way to write
right way is LVDS-1
this name u can find by running xrandr without any parameters :
hense use this
xrandr --output LVDS-1 --brightness 0.5
edited Dec 24 at 21:55
waltinator
21.9k74169
answered Dec 24 at 19:19
resis10ce
1
New contributor
resis10ce 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 |
command is not perfectly written..
I was having same problem too.. and sufferd a lot
this used to give me same error to - xrandr --output LVDS1 --brightness 0.5
bt after searching .. i found out lvds1 is not the proper way to write
right way is LVDS-1
this name u can find by running xrandr without any parameters :
hense use this
xrandr --output LVDS-1 --brightness 0.5
edited Dec 24 at 21:55
waltinator
21.9k74169
answered Dec 24 at 19:19
resis10ce
1
New contributor
resis10ce 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 |
command is not perfectly written..
I was having same problem too.. and sufferd a lot
this used to give me same error to - xrandr --output LVDS1 --brightness 0.5
bt after searching .. i found out lvds1 is not the proper way to write
right way is LVDS-1
this name u can find by running xrandr without any parameters :
hense use this
xrandr --output LVDS-1 --brightness 0.5
edited Dec 24 at 21:55
waltinator
21.9k74169
answered Dec 24 at 19:19
resis10ce
1
New contributor
resis10ce is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
command is not perfectly written..
I was having same problem too.. and sufferd a lot
this used to give me same error to - xrandr --output LVDS1 --brightness 0.5
bt after searching .. i found out lvds1 is not the proper way to write
right way is LVDS-1
this name u can find by running xrandr without any parameters :
hense use this
xrandr --output LVDS-1 --brightness 0.5
edited Dec 24 at 21:55
waltinator
21.9k74169
answered Dec 24 at 19:19
resis10ce
1
New contributor
resis10ce is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
edited Dec 24 at 21:55
waltinator
21.9k74169
edited Dec 24 at 21:55
waltinator
21.9k74169
edited Dec 24 at 21:55
waltinator
21.9k74169
21.9k74169
answered Dec 24 at 19:19
resis10ce
1
New contributor
resis10ce is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
answered Dec 24 at 19:19
resis10ce
1
answered Dec 24 at 19:19
resis10ce
1
1
New contributor
resis10ce is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
New contributor
resis10ce is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.
resis10ce 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 |
add a comment |
Thanks for contributing an answer to Ask Ubuntu!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Some of your past answers have not been well-received, and you're in danger of being blocked from answering.
Please pay close attention to the following guidance:
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2faskubuntu.com%2fquestions%2f659836%2fbrightness-control-not-available-in-ubuntu-14-04-acer-veriton-desktop%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Please edit your question and add output of
lspci -k | grep -EA2 'VGA|3D'terminal command.– Pilot6
Aug 10 '15 at 19:35