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Thread: Monitor-brightness went nuts!

  1. #1
    Join Date
    Feb 2013
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    Monitor-brightness went nuts!

    Hi everyone,

    Monitor-brightness is not(worked just once!) via keyboard Fn-F5orF6 in-or decreasable-what might be the problem? The monitor is always on maximum brightness!
    Or is there another way to adjust the brightness, did not find one!

    Thanks for your help!

  2. #2
    Join Date
    Jun 2005
    Location
    Toronto, Canada
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    Xubuntu 14.04 Trusty Tahr

    Re: Monitor-brightness went nuts!

    It would be helpful if you provided some more information, specifically:

    1. The make and model of your computer.
    2. The version of lubuntu that you are using.
    3. Your current kernel boot parameters:
      Code:
      cat /proc/cmdline
    4. Information about your video card(s):
      Code:
      lspci -k | grep -iA2 VGA
    5. A listing of your backlight interfaces and the values of the associated brightness settings:
      Code:
      for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/actual_brightness; cat $i/max_brightness; done
    6. Your dmesg log file:
      Code:
      pastebinit /var/log/dmesg
      ...and post back the link that is generated.
    7. Your Xorg log file:
      Code:
      pastebinit /var/log/Xorg.0.log
      ...and post back the link that is generated.


    *If you get a message stating that pastebinit is not installed, you can install it by searching for it in the Software Centre or by running the following command:
    Code:
    sudo apt-get install pastebinit

  3. #3
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    Feb 2013
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    Re: Monitor-brightness went nuts!

    1. Vaionetbook VPCW21C7E
    2. Lubuntu 13.10 Desktop
    3. I assume the code you provided I have to write in a terminal(which one?-there are three terminals existing) then writing this down, enter, and paste the result here?
    I ask this, because I am unexperienced!
    Thanks!

  4. #4
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    Location
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    Xubuntu 14.04 Trusty Tahr

    Re: Monitor-brightness went nuts!

    3. I assume the code you provided I have to write in a terminal(which one?-there are three terminals existing) then writing this down, enter, and paste the result here?
    Yes. Any terminal will do. Paste the results back here.

  5. #5
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    Feb 2013
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    Re: Monitor-brightness went nuts!

    Booting the OS from flashdrive resulted in the same problem-just a check.

    I pasted the outputs of the terminal on Abiword, this file-type is not mentioned eligible as attachment, nevertheless I will try it. If it does not work-what to do?
    Pastebin seems, according to the terminal-output, to exist. When searching via Softwarecenter-Installed Software, Pastebin does not exist.

    Should I install it, based on mentioned result?

    PS: Indeed, attaching the Abi-file did not work-invalid!

  6. #6
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    Xubuntu 14.04 Trusty Tahr

    Re: Monitor-brightness went nuts!

    For steps 3 to 5, just copy the results from the terminal and past back here as a reply.

    For steps 6 & 7, first install pastebinit by running this command in a terminal (its a small useful program):
    Code:
    sudo apt-get install pastebinit
    ...enter your password when prompted, then run the above commands and post back the links that the program generates.

  7. #7
    Join Date
    Feb 2013
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    84

    Re: Monitor-brightness went nuts!

    Now I use the netbook for the reply, with the PC I could not open the Abiworddoc..Here are the results:

    Code:
    jane@jane:~$ cat/proc/cmdline
    bash: cat/proc/cmdline: No such file or directory
    Code:
    jane@jane:~$ lspci -k | grep -iA2 VGA
    00:02.0 VGA compatible controller: Intel Corporation Atom Processor D4xx/D5xx/N4xx/N5xx Integrated Graphics Controller
        Subsystem: Sony Corporation Device 9066
        Kernel driver in use: i915
    Code:
    jane@jane:~$  for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat  $i/actual_brightness; cat $i/max_brightness; done
    /sys/class/backlight/acpi_video0
    8
    8
    8
    /sys/class/backlight/intel_backlight
    26010
    26010
    26015
    Code:
    jane@jane:~$ pastebinit /var/log/dmesg
    The program 'pastebinit' can be found in the following packages:
     * pastebinit
     * pastebinit
    Try: sudo apt-get install <selected package>
    
    jane@jane:~$ pastebinit /var/log/Xorg.0.log
    The program 'pastebinit' can be found in the following packages:
     * pastebinit
     * pastebinit
    Try: sudo apt-get install <selected package>
    
    
    jane@jane:~$ sudo apt-get install <selected package>
    bash: syntax error near unexpected token `newline'
    
    The steps 5 & 6:  jane@jane:~$ sudo apt-get pastebinit
    [sudo] password for jane: 
    E: Invalid operation pastebinit
    The Softwarecenter offered at first a Nautilus pastebinit, the second trial yielded no results.

    Thanks a lot for your assistance!
    Last edited by Toz; December 13th, 2013 at 12:30 PM. Reason: added code tags

  8. #8
    Join Date
    Jun 2005
    Location
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    Xubuntu 14.04 Trusty Tahr

    Re: Monitor-brightness went nuts!

    From a terminal window:

    Code:
    sudo -i leafpad /usr/share/X11/xorg.conf.d/20-intel.conf
    ...enter your password when prompted, then copy/paste this content in:

    Code:
    Section "Device"
            Identifier  "card0"
            Driver      "intel"
            Option      "Backlight"    "intel_backlight"
            BusID       "PCI:0:2:0"
    EndSection
    Save the file then reboot.

    *Make sure you enter the commands in properly, including all spacing. Better to copy and paste the commands.

    *After you reboot, check the brightness and please post back the contents of the file you created (/usr/share/X11/xorg.conf.d/20-intel.conf) to confirm accuracy.

  9. #9
    Join Date
    Feb 2013
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    84

    Re: Monitor-brightness went nuts!

    Here what I did: Opened terminal, pasted there the first code, a window popped up, second code pasted, clicked "save", reboot.
    Brightnes uncontrollable.
    Pasted /usr/....in the terminal:

    Code:
    jane@jane:~$ /usr/share/X11/xorg.conf.d/20-intel.conf
    bash: /usr/share/X11/xorg.conf.d/20-intel.conf: Permission denied
    Last edited by Toz; December 13th, 2013 at 12:31 PM. Reason: added code tags

  10. #10
    Join Date
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    Xubuntu 14.04 Trusty Tahr

    Re: Monitor-brightness went nuts!

    Can you post back the contents of /usr/share/X11/xorg.conf.d/20-intel.conf?

    Can you also post back a couple of log files like this:
    Code:
    pastebinit /var/log/dmesg
    ...and post back the link that is generated.

    Code:
    pastebinit /var/log/Xorg.0.log
    ...and post back the link that is generated.

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