intel_backlight with no value...

Richard Cranium · 02-25-2015, 09:15 PM

Quote:

Originally Posted by gor0

momentarily

this did the job:

http://www.linuxquestions.org/questi...4/#post5247239

Code:

echo 100 > /sys/class/backlight/intel_backlight/brightness

If that works, run the following as root...

Code:

echo "echo 100 > /sys/class/backlight/intel_backlight/brightness" >> /etc/rc.d/rc.local
chmod a+x /etc/rc.d/rc.local

...which simply adds the command that you state fixes the problem to /etc/rc.d/rc.local and then ensures that /etc/rc.d/rc.local is executable. /etc/rc.d/rc.local is run after every boot by /etc/rc.d/rc.M if it is executable.

EDIT: Of course, your screen will be bright until near the end of the booting process.

Head_on_a_Stick · 02-26-2015, 01:37 AM

Quote:

Originally Posted by gor0

How to update /etc/default/grub ?

I have no idea why that's not working -- you could just edit /etc/grub/grub/cfg directly if you find a kernel parameter that works better.

I misread your OP and I thought you were saying there was no content under /sys/class/backlight -- sorry (I was very tired).

If the `echo` command works then you probably already have all the functionality intact -- does this command work:

Code:

xbacklight -set 10

See man xbacklight

You can set up some manual keybinds based on this or the `echo` command.

However, the next time you update your kernel image dpkg will fail because it cannot run `update-grub` and you will no longer be able to update your Debian system -- you should start a new thread to troubleshoot this specific issue.

gor0 · 02-26-2015, 03:04 AM

Quote:

Originally Posted by Head_on_a_Stick

Debian system

Runnin Slack 'pal'(thus b/w qm)

Richard Cranium · 02-26-2015, 06:46 AM

Quote:

Originally Posted by Head_on_a_Stick

However, the next time you update your kernel image dpkg will fail because it cannot run `update-grub` and you will no longer be able to update your Debian system -- you should start a new thread to troubleshoot this specific issue.

This thread is in the Slackware forum.

gor0 · 02-26-2015, 09:32 AM

Quote:

Originally Posted by gor0

How to update /etc/default/grub ?

hi there...

it is possible to update /etc/default/grub without GRUB installed on Slackware [skipped on install] ? need this info for solve my issue !

tia!

Head_on_a_Stick · 02-26-2015, 02:22 PM

Quote:

Originally Posted by Richard Cranium

This thread is in the Slackware forum.

My apologies -- the OP stated that his Debian system was "in charge" of GRUB and I was working on the assumption that this was all from that system (silly me).
http://www.linuxquestions.org/questi...2/#post5323343

@OP: If this is all in Slackware then that's why there is no `update-grub` command...

FWIW you don't "update /etc/default/grub", that file is used as a template for the GRUB configuration file at /boot/grub/grub.cfg

Sorry for all this confusion -- I will try to pay more attention next time.

gor0 · 02-26-2015, 03:34 PM

Quote:

Originally Posted by Head_on_a_Stick

/boot/grub/grub.cfg

I don't have it !!!

if no one helps ...then... i'm goin to need to talk with PAT... or QUIT the distro ...

Head_on_a_Stick · 02-26-2015, 04:16 PM

Quote:

Originally Posted by gor0

I don't have it !!!

if no one helps ...then... i'm goin to need to talk with PAT... or QUIT the distro ...

Slackware boots using LILO rather than GRUB -- please don't blame your confusion on Saint Volkerding: it's all my fault!

I don't use LILO (even in my Slackware system I boot using GRUB from Arch) so I can't help you with that sorry.

ivandi · 02-26-2015, 04:17 PM

I had to create /etc/X11/xorg.conf.d/20-intel.conf

Code:

Section "Device"
    Identifier  "card0"
    Driver      "intel"
    Option      "Backlight"  "intel_backlight"
    BusID       "PCI:0:2:0"
EndSection

to make brightness control Fn+Up/Down and xbacklight work in X.

Cheers

Didier Spaier · 02-26-2015, 04:22 PM

Quote:

Originally Posted by gor0

I don't have it !!!

if no one helps ...then... i'm goin to need to talk with PAT... or QUIT the distro ...

Why not just do what you were advised by Richard Cranium in post n° 16???

I suggest you don't bother Pat with this kind of non-issue.

Feel free to move (again) to another distribution, then encounter another small issue then move (again) to another distribution then... Some people call that perpetual motion, others just distro-hopping. Nevertheless, as long as you have fun all is good

PS I saw ivandi's answer just after posting. Worth trying, I think.

gor0 · 02-26-2015, 04:28 PM

Code:

mount --bind /dev /mnt/sda6/dev
mount: mount point /mnt/sda6/dev does not exist

http://www.linuxquestions.org/questi...chroot-770865/

Didier Spaier · 02-26-2015, 04:35 PM

Quote:

Originally Posted by gor0

Code:

mount --bind /dev /mnt/sda6/dev
mount: mount point /mnt/sda6/dev does not exist

http://www.linuxquestions.org/questi...chroot-770865/

Typing blindly commands you find at random, not even trying to understand what they are supposed to do, won't lead you anywhere. The error message is right: there is no directory /mnt/sda6/dev as you didn't create one.

gor0 · 02-26-2015, 04:38 PM

Quote:

Originally Posted by ivandi

I had to create /etc/X11/xorg.conf.d/20-intel.conf

Code:

Section "Device"
    Identifier  "card0"
    Driver      "intel"
    Option      "Backlight"  "intel_backlight"
    BusID       "PCI:0:2:0"
EndSection

to make brightness control Fn+Up/Down and xbacklight work in X.

hi !

can you expand? (how to create and what commands to create it)

tia!

Alien Bob · 02-26-2015, 04:51 PM

Quote:

Originally Posted by gor0

hi !

can you expand? (how to create and what commands to create it)

tia!

Just copy and paste this in your terminal, without thinking:

Code:

cat <<oaf|rev|rot13>/etc/X11/xorg.conf.d/20-intel.conf
"rpvirQ" abvgprF
"0qenp"  ervsvgarqV    
"yrgav"      eriveQ    
"gutvyxpno_yrgav"  "gutvyxpnO"      abvgcB    
"0:2:0:VPC"       QVfhO    
abvgprFqaR
oaf

Didier Spaier · 02-26-2015, 05:09 PM

Alternatively, you could use this variant:

Code:

cat <<oaf|rev|tr 'A-Za-z' 'N-ZA-Mn-za-m'>/etc/X11/xorg.conf.d/20-intel.conf
"rpvirQ" abvgprF
"0qenp"  ervsvgarqV    
"yrgav"      eriveQ    
"gutvyxpno_yrgav"  "gutvyxpnO"      abvgcB    
"0:2:0:VPC"       QVfhO    
abvgprFqaR
oaf