16 Jul
2019
16 Jul
'19
9:10 a.m.
Hello,
ls -al /sys/class//backlight/
intel_backlight ->
../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight
ls -al /sys/class/backlight/acpi_video0/
no file
xbacklight is installed.
To adjust the brigtness :
Menu => Trinity Configuration Center
=> Périphériques => Hardware Device Manager
=> Backlight => Intel HD Graphics 520
and I can adjust the brightness from 0 to 100%,
but the value is not keeped if I close the session.
The default value = 62%
This is the situation.
Regards,
André
18 Jul
18 Jul
2:02 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On 07/16/2019 04:10 AM, andre_debian(a)numericable.fr wrote:
Hello,
ls -al /sys/class//backlight/
intel_backlight ->
../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight
ls -al /sys/class/backlight/acpi_video0/
no file
xbacklight is installed.
To adjust the brigtness :
Menu => Trinity Configuration Center
=> Périphériques => Hardware Device Manager
=> Backlight => Intel HD Graphics 520
and I can adjust the brightness from 0 to 100%,
but the value is not keeped if I close the session.
The default value = 62%
This is the situation.
This is where you can create a script to monitor intel_backlight and write the
value out to, e.g. /usr/local/share/${USER}-backlight
cat /sys/class/backlight/intel_backlight/brightness >
/usr/local/share/${USER}-backlight
Then simply create another script (linked within ~/.trinity/Autostart) that
will restore the brightness level on trinity startup, e.g.
#!/bin/sh
savedbl="/usr/local/share/${USER}-backlight"
sysfile="/sys/class/backlight/intel_backlight/brightness"
if [ -s "$savedbl" ] ## if saved backlight file exists
then
sudo sh -c "cat '"$savedbl"' >
'"$sysfile"'" ## restore saved backlight
fi
(just make sure the file is executable and that you have sudo privileges)
--
David C. Rankin, J.D.,P.E.
19 Jul
19 Jul
8:36 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On Thursday 18 July 2019 04:02:13 David C. Rankin wrote:
This is where you can create a script to monitor
intel_backlight
and write the value out to, e.g. /usr/local/share/${USER}-backlight
Hello David,
I cannot create the file "${USER}-backlight" in /usr/local/share/
or I don't understand (maybe the "$" ?)
Thanks, regards,
andré
cat /sys/class/backlight/intel_backlight/brightness
>
/usr/local/share/${USER}-backlight
Then simply create another script (linked within ~/.trinity/Autostart) that
will restore the brightness level on trinity startup, e.g.
#!/bin/sh
savedbl="/usr/local/share/${USER}-backlight"
sysfile="/sys/class/backlight/intel_backlight/brightness"
if [ -s "$savedbl" ] ## if saved backlight file exists
then
sudo sh -c "cat '"$savedbl"' >
'"$sysfile"'" ## restore saved backlight
fi
(just make sure the file is executable and that you have sudo privileges)
20 Jul
20 Jul
1:07 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On 07/19/2019 03:36 AM, andre_debian(a)numericable.fr wrote:
Hello David,
I cannot create the file "${USER}-backlight" in /usr/local/share/
or I don't understand (maybe the "$" ?)
Thanks, regards,
andré
andré,
"${USER}-backlight" will be a new file that holds the current brightness
setting. ${USER} just expands to your username. It was just brace-enclosed to
make that apparent.
For what it is worth I use the following script (with a second script that
is just a wrapper to call the primary script with the -s option for startup)
The wrapper script (scrnbrightwiznv_startup.sh) is simply:
#!/bin/bash
/home/david/scr/adm/scrnbrightwiznv.sh -s
In my ~/.kde/Autostart (you would have ~/.trinity/Autostart or
~/.tde/Autostart), I just use the symlink
l ~/.kde/Autostart/
...
scrnbrightwiznv_startup.sh -> /home/david/scr/adm/scrnbrightwiznv_startup.sh
The primary script is attached. You will need to change acpi_video0 to
intel_backlight. Other than that, it should work for you. You can simply use
the wrapper calling it with the -s option at startup in the Autostart folder
if tdepowersave handles the changes during the session for you. (however, you
will need a way to write the final brightness value to the file in /usr/local/
so it is saved for next startup.
There is no right way or wrong way to do this. Like I posted earlier, it can
be display driver dependent, kernel dependent, distribution config dependent,
etc.. Just find a way that works and stick with it :)
--
David C. Rankin, J.D.,P.E.
9:33 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On Saturday 20 July 2019 03:07:00 David C. Rankin wrote:
On 07/19/2019 03:36 AM, andre_debian(a)numericable.fr
wrote:
> I cannot create the file "${USER}-backlight" in /usr/local/share/
"${USER}-backlight" will be a new file that
holds the current brightness
setting. ${USER} just expands to your username. It was just brace-enclosed
to make that apparent.
For what it is worth I use the following script (with a second script that
is just a wrapper to call the primary script with the -s option for startup)
The wrapper script (scrnbrightwiznv_startup.sh) is simply:
[cut]
Hello David,
Ok, so the right line is :
/usr/local/share/andre-backlight
Thanks for the file "scrnbrightwiznv.sh".
I make the test asap and will tell you.
Good week-end, Regards,
André
1:45 p.m.
New subject: [trinity-users] to adjust the brigtness of the screen
David,
The first method cannot work for me, because the
file "/sys/class/backlight/intel_backlight/brightness"
cannot be changed, with this default value "6144".
(I need 9144).
On Saturday 20 July 2019 03:07:00 David C. Rankin wrote:
"${USER}-backlight" will be a new file
that holds the current brightness
setting. ${USER} just expands to your username. It was just brace-enclosed
to make that apparent.
For what it is worth I use the following script (with a second script that
is just a wrapper to call the primary script with the -s option for startup)
The wrapper script (scrnbrightwiznv_startup.sh) is simply:
#!/bin/bash
/home/david/scr/adm/scrnbrightwiznv.sh -s
In my ~/.kde/Autostart (you would have ~/.trinity/Autostart or
~/.tde/Autostart), I just use the symlink
l ~/.kde/Autostart/
scrnbrightwiznv_startup.sh -> /home/david/scr/adm/scrnbrightwiznv_startup.sh
The primary script is attached. You will need to change acpi_video0 to
intel_backlight. Other than that, it should work for you. You can simply use
the wrapper calling it with the -s option at startup in the Autostart folder
if tdepowersave handles the changes during the session for you.
(however, you will need a way to write the final brightness value to the
file in /usr/local/ so it is saved for next startup.
There is no right way or wrong way to do this. Like I posted earlier,
it can
be display driver dependent, kernel dependent, distribution config
dependent,
etc.. Just find a way that works and stick with it :)
The directory Autostart is in :
/home/andre/.trinity/Autostart/
So I put exactly this line in "/home/andre/.trinity/Autostart/" ? :
scrnbrightwiznv_startup.sh -> /home/andre/scr/adm/scrnbrightwiznv_startup.sh
Thanks for your help and Regards,
André
22 Jul
22 Jul
7:16 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On 07/20/2019 08:45 AM, andre_debian(a)numericable.fr wrote:
The directory Autostart is in :
/home/andre/.trinity/Autostart/
So I put exactly this line in "/home/andre/.trinity/Autostart/" ? :
scrnbrightwiznv_startup.sh -> /home/andre/scr/adm/scrnbrightwiznv_startup.sh
Thanks for your help and Regards,
André
Yes, that's fine, just make sure your
/home/andre/scr/adm/scrnbrightwiznv_startup.sh is executable, e.g.
chmod +x /home/andre/scr/adm/scrnbrightwiznv_startup.sh
You also need to make sure you have sudo access without a password. Generally
meaning you add your user to the wheel group, e.g. as root
# gpasswd -a andre wheel
(some distros have dropped wheel group and instead use a 'sudo' group)
Then as root, visudo to edit the sudoers file and set:
## Uncomment to allow members of group wheel to execute any command
# %wheel ALL=(ALL) ALL
## Same thing without a password
%wheel ALL=(ALL) NOPASSWD: ALL
(generally toward the bottom of the file)
That will allow you to set /sys/class/backlight/intel_backlight/brightness
with the call in the script, e.g. with the line
sudo sh -c "echo '"$newbl"' >
'"$blfn"'"
--
David C. Rankin, J.D.,P.E.
23 Jul
23 Jul
4:04 p.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On Monday 22 July 2019 09:16:20 David C. Rankin wrote:
On 07/20/2019 08:45 AM, andre_debian(a)numericable.fr
wrote:
Yes, that's fine, just make sure your
/home/andre/scr/adm/scrnbrightwiznv_startup.sh is executable, e.g.
chmod +x /home/andre/scr/adm/scrnbrightwiznv_startup.sh
You also need to make sure you have sudo access without a password.
Generally meaning you add your user to the wheel group, e.g. as root
# gpasswd -a andre wheel
(some distros have dropped wheel group and instead use a 'sudo' group)
Then as root, visudo to edit the sudoers file and set:
## Uncomment to allow members of group wheel to execute any command
# %wheel ALL=(ALL) ALL
## Same thing without a password
%wheel ALL=(ALL) NOPASSWD: ALL
(generally toward the bottom of the file)
That will allow you to set /sys/class/backlight/intel_backlight/brightness
with the call in the script, e.g. with the line
sudo sh -c "echo '"$newbl"' >
'"$blfn"'"
The problem David,
is that in root, I receive forbidden, if I want to change the value
in the file :
/sys/class/backlight/intel_backlight/brightness
changing = no possible.
The file is 664.
Regards,
André
24 Jul
24 Jul
11:09 p.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On 07/23/2019 11:04 AM, andre_debian(a)numericable.fr wrote:
The problem David,
is that in root, I receive forbidden, if I want to change the value
in the file :
/sys/class/backlight/intel_backlight/brightness
changing = no possible.
The file is 664.
Regards,
André
That's weird, and that tells me you are not actually running sudo (or you are
somehow running the script with UID or EUID 0.
With file permission 664 that is rw_rw_r__ meaning the owner has read/write,
group has read/write and world has read. If you have configured sudo (and the
sudoers file as discussed) then as root (under sudo) you have write permission
and you can change the file. So if you are getting "permission denied", your
sudo is failing.
Try this (if your range is 0-99 for brightness):
sudo sh -c "echo '"50"' >
'"/sys/class/backlight/intel_backlight/brightness"'
The screen brightness should change to 1/2 brightness. Then change it to 25,
it should change to 1/4 brightness, etc...
If that fails, you have a sudo problem. Now su to root and try the same thing.
If that fails, then we really have problems. Let me know. I suspect there is
an issue with the sudo config. You have to set it up as I showed you. The only
wildcard is whether you have a wheel group or whether your distro uses a group
called sudo instead. Check and let me know, we will get this sorted.
--
David C. Rankin, J.D.,P.E.
25 Jul
25 Jul
3:37 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On 07/24/2019 06:09 PM, David C. Rankin wrote:
On 07/23/2019 11:04 AM, andre_debian(a)numericable.fr
wrote:
Also take a look at:
man systemd-backlight@.service
where systemd can save and restore the current backlight at shutdown on next
boot. That may be another alternative for you to restore the last used
backlight rather than manually saving and restoring yourself. I haven't tried
it, but it looks promising.
--
David C. Rankin, J.D.,P.E.
The problem David,
is that in root, I receive forbidden, if I want to change the value
in the file :
/sys/class/backlight/intel_backlight/brightness
changing = no possible.
The file is 664.
Regards,
André
That's weird, and that tells me you are not actually running sudo (or you are
somehow running the script with UID or EUID 0.
With file permission 664 that is rw_rw_r__ meaning the owner has read/write,
group has read/write and world has read. If you have configured sudo (and the
sudoers file as discussed) then as root (under sudo) you have write permission
and you can change the file. So if you are getting "permission denied", your
sudo is failing.
Try this (if your range is 0-99 for brightness):
sudo sh -c "echo '"50"' >
'"/sys/class/backlight/intel_backlight/brightness"'
The screen brightness should change to 1/2 brightness. Then change it to 25,
it should change to 1/4 brightness, etc...
If that fails, you have a sudo problem. Now su to root and try the same thing.
If that fails, then we really have problems. Let me know. I suspect there is
an issue with the sudo config. You have to set it up as I showed you. The only
wildcard is whether you have a wheel group or whether your distro uses a group
called sudo instead. Check and let me know, we will get this sorted.
21 Jul
21 Jul
11:20 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On Saturday 20 July 2019 03:07:00 David C. Rankin wrote:
For what it is worth I use the following script
(with a second script that
is just a wrapper to call the primary script with the -s option for startup)
The wrapper script (scrnbrightwiznv_startup.sh) is simply:
#!/bin/bash
/home/david/scr/adm/scrnbrightwiznv.sh -s
~/.tde/Autostart) I just use the symlink
scrnbrightwiznv_startup.sh -> /home/david/scr/adm/scrnbrightwiznv_startup.sh
Hello David,
It's exactly what I did as you wrote above.
"scrnbrightwiznv_startup.sh" only displays the value of the screen brightness,
always 6144 (60%).
And the file :
"/sys/class/backlight/intel_backlight/brightness"
doesn't save the new value (90%) with this method :
Menu => Trinity Configuration Center =>
Peripherical devices => Hardware Device Manager
=> Backlight => Intel HD Graphics 520
and I can adjust the brightness from 0 to 100%,
The value is not saved if I close the session.
The default value = 62%
Now, I see that the majority of the laptop is with a video card
"Intel HD Graphics 520/620" (Dell, Lenovo, HP, Compaq...),
How the users on Linux with TDE adjust their screen brightness
and save the value ?
Regards,
André
19 Jul
19 Jul
10:12 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
Dne út 16. července 2019 andre_debian(a)numericable.fr napsal(a):
Hello,
ls -al /sys/class//backlight/
intel_backlight ->
../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backli
ght
ls -al /sys/class/backlight/acpi_video0/
no file
xbacklight is installed.
To adjust the brigtness :
Menu => Trinity Configuration Center
=> Périphériques => Hardware Device Manager
=> Backlight => Intel HD Graphics 520
and I can adjust the brightness from 0 to 100%,
but the value is not keeped if I close the session.
The default value = 62%
This is the situation.
Regards,
André
Hi André,
you can install TDE Powersave and then adjust the brightness there.
Cheers
--
Slávek
10:44 a.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On Friday 19 July 2019 12:12:53 Slávek Banko wrote:
Dne út 16. července 2019 andre_debian(a)numericable.fr
napsal(a):
Hello,
ls -al /sys/class//backlight/
intel_backlight ->
../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backlight
> ls -al /sys/class/backlight/acpi_video0/
> no file
> xbacklight is installed.
> To adjust the brightness :
> Menu => Trinity Configuration Center
> => Périphériques => Hardware Device Manager
> => Backlight => Intel HD Graphics 520
> and I can adjust the brightness from 0 to 100%,
> but the value is not keeped if I close the session.
> The default value = 62% Hi André,
you can install TDE Powersave and then adjust the brightness there.
Cheers
Hello Slavek,
It's what I did, "tde-powersave" installed.
Where to adjust the brightness ?
Only this solution :
Menu => Trinity Configuration Center
=>Peripheral devices => Hardware Device Manager
=> Backlight => Intel HD Graphics 520
I can adjust from 0 to 100%,
but the value is not saved if I close the session or reboot.
The default value = 62%.
When the computer pause begins (45min), the brightness becomes 5%,
so low that I have to reboot the computer.
My video card is Intel HD 520, but not dedicated,
works with the processor and the RAM.
Before, I could do that by "left button mouse",
Desktop configuration => Display => Energy Control.
But, this possiblity has disappeared, only gamma configuration.
With another laptop, dedicated video card, (nvidia or ATI), it works fine.
Thanks, regards,
André
1:29 p.m.
New subject: [trinity-users] to adjust the brigtness of the screen
On Friday 19 July 2019 03:44:33 andre_debian(a)numericable.fr wrote:
On Friday 19 July 2019 12:12:53 Slávek Banko wrote:
In my own system, I have a config file that could be what you're searching
for. Look here:
/home/<your_top_secret_superhero_identity>/.kde/share/config/tdepowersaverc
Now, *caveat lector* on this point; I was combing through my system to find my
old KDE3 config files, and to convert them to TDE config files. Sometimes
they keep the same old folder as before in KDE3; in other cases, I needed to
transfer them to the appropriate folder, e.g., into /opt/trinity/share; but
have discovered that this is not always a simple equation of KDE3 to TDE.
Sometimes these config files keep the same old folder as in KDE3, sometimes
not; then again, sometimes they get changed from plaintext files to xml or
kcfg, etc.; yet again, they sometimes disappear completely, or get moved to
somewhere that ordinary users will never find.
In any case, I can find no corresponding KDE config file of any sort.
Anyway, tdepowersaverc is a plaintext config file, and (assuming it's still
valid) you can probably insert some lines to get it to do what you want.
Bill
Dne út 16. července 2019
andre_debian(a)numericable.fr napsal(a):
Hello Slavek,
It's what I did, "tde-powersave" installed.
Where to adjust the brightness ?
Only this solution :
Menu => Trinity Configuration Center
=>Peripheral devices => Hardware Device Manager
=> Backlight => Intel HD Graphics 520
I can adjust from 0 to 100%,
but the value is not saved if I close the session or reboot.
The default value = 62%.
When the computer pause begins (45min), the brightness becomes 5%,
so low that I have to reboot the computer.
My video card is Intel HD 520, but not dedicated,
works with the processor and the RAM.
Before, I could do that by "left button mouse",
Desktop configuration => Display => Energy Control.
But, this possiblity has disappeared, only gamma configuration.
With another laptop, dedicated video card, (nvidia or ATI), it works fine.
Thanks, regards,
André
Hello,
ls -al /sys/class//backlight/
intel_backlight ->
../../devices/pci0000:00/0000:00:02.0/drm/card0/card0-eDP-1/intel_backli
ght
ls -al /sys/class/backlight/acpi_video0/
no file
xbacklight is installed.
To adjust the brightness :
Menu => Trinity Configuration Center
=> Périphériques => Hardware Device Manager
=> Backlight => Intel HD Graphics 520
and I can adjust the brightness from 0 to 100%,
but the value is not keeped if I close the session.
The default value = 62%
Hi André,
you can install TDE Powersave and then adjust the brightness there.
Cheers
1748
days inactive
1757
days old
13 comments
4 participants
participants (4)
-
andre_debian＠numericable.fr -
David C. Rankin -
Slávek Banko -
William Morder via trinity-users