Making backlight brightness persistent across reboots
I have two X200 Thinkpads. They both have the rather annoying problem
that, unless the display backlight is set to its maximal value, it emits
an unbearable noise. The odd thing is that one of them boots with the
max. value and the other does not. It is also impossible to set the
second computer's display to the max. brightness value by using the
brightness-up button (it will only reach 779942 of 846600). I have to
cat /sys/class/backlight/intel_backlight/max_brightness >/sys/class/backlight/intel_backlight/brightness
Now the sound goes away but only until the next reboot. Is there
anything I can do to make the brightness value persistent across reboots?
PS. I understand that I can run a script on startup, but something is
making my first comptuer different and I would like to know what. I
have tried this using the exact same OS (the same live USB), and both
computers have the same BIOS version (from 2012; 7.22?) and settings.
The difference is also there in the BIOS setup, before loading any OS.
display
asked 2 hours ago
ToothrotToothrot
858621
add a comment |
I have two X200 Thinkpads. They both have the rather annoying problem
that, unless the display backlight is set to its maximal value, it emits
an unbearable noise. The odd thing is that one of them boots with the
max. value and the other does not. It is also impossible to set the
second computer's display to the max. brightness value by using the
brightness-up button (it will only reach 779942 of 846600). I have to
cat /sys/class/backlight/intel_backlight/max_brightness >/sys/class/backlight/intel_backlight/brightness
Now the sound goes away but only until the next reboot. Is there
anything I can do to make the brightness value persistent across reboots?
PS. I understand that I can run a script on startup, but something is
making my first comptuer different and I would like to know what. I
have tried this using the exact same OS (the same live USB), and both
computers have the same BIOS version (from 2012; 7.22?) and settings.
The difference is also there in the BIOS setup, before loading any OS.
display
asked 2 hours ago
ToothrotToothrot
858621
Possible duplicate of How to run Bash script on startup on Linux?
– Fabby
1 hour ago
add a comment |
I have two X200 Thinkpads. They both have the rather annoying problem
that, unless the display backlight is set to its maximal value, it emits
an unbearable noise. The odd thing is that one of them boots with the
max. value and the other does not. It is also impossible to set the
second computer's display to the max. brightness value by using the
brightness-up button (it will only reach 779942 of 846600). I have to
cat /sys/class/backlight/intel_backlight/max_brightness >/sys/class/backlight/intel_backlight/brightness
Now the sound goes away but only until the next reboot. Is there
anything I can do to make the brightness value persistent across reboots?
PS. I understand that I can run a script on startup, but something is
making my first comptuer different and I would like to know what. I
have tried this using the exact same OS (the same live USB), and both
computers have the same BIOS version (from 2012; 7.22?) and settings.
The difference is also there in the BIOS setup, before loading any OS.
display
asked 2 hours ago
ToothrotToothrot
858621
I have two X200 Thinkpads. They both have the rather annoying problem
that, unless the display backlight is set to its maximal value, it emits
an unbearable noise. The odd thing is that one of them boots with the
max. value and the other does not. It is also impossible to set the
second computer's display to the max. brightness value by using the
brightness-up button (it will only reach 779942 of 846600). I have to
cat /sys/class/backlight/intel_backlight/max_brightness >/sys/class/backlight/intel_backlight/brightness
Now the sound goes away but only until the next reboot. Is there
anything I can do to make the brightness value persistent across reboots?
PS. I understand that I can run a script on startup, but something is
making my first comptuer different and I would like to know what. I
have tried this using the exact same OS (the same live USB), and both
computers have the same BIOS version (from 2012; 7.22?) and settings.
The difference is also there in the BIOS setup, before loading any OS.
display
display
asked 2 hours ago
ToothrotToothrot
858621
asked 2 hours ago
ToothrotToothrot
858621
edited 18 mins ago
Toothrot
asked 2 hours ago
ToothrotToothrot
858621
asked 2 hours ago
ToothrotToothrot
858621
asked 2 hours ago
ToothrotToothrot
858621
858621
Possible duplicate of How to run Bash script on startup on Linux?
– Fabby
1 hour ago
add a comment |
Possible duplicate of How to run Bash script on startup on Linux?
– Fabby
1 hour ago
Possible duplicate of How to run Bash script on startup on Linux?
– Fabby
1 hour ago
Possible duplicate of How to run Bash script on startup on Linux?
– Fabby
1 hour ago
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "106"
};
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: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
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%2funix.stackexchange.com%2fquestions%2f505239%2fmaking-backlight-brightness-persistent-across-reboots%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
Thanks for contributing an answer to Unix & Linux Stack Exchange!
- 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%2funix.stackexchange.com%2fquestions%2f505239%2fmaking-backlight-brightness-persistent-across-reboots%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
Possible duplicate of How to run Bash script on startup on Linux?
– Fabby
1 hour ago