Page 1 of 2 12 LastLast
Results 1 to 10 of 12

Thread: vostro 2420 boots at full brightness

  1. #1
    Join Date
    Sep 2013
    Location
    Virginia
    Beans
    22
    Distro
    Ubuntu 14.10 Utopic Unicorn

    vostro 2420 boots at full brightness

    Is there an equivelant to config.sys (or any method) where i can set the brightness level by default instead of having to manually set it each boot?

  2. #2
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: vostro 2420 boots at full brightness

    Hello and welcome to the forums.

    Yes there is (/etc/rc.local), but knowing what to put in there is a little more difficult.
    Can you provide us with some more informtion:

    1. What video card/driver are you using? Open a terminal window, type the following command and post back the results:
    Code:
    lspci -k | grep -A3 VGA
    2. What backlight interfaces do you have?
    Code:
    for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/actual_brightness; cat $i/max_brightness; done

  3. #3
    Join Date
    Sep 2013
    Location
    Virginia
    Beans
    22
    Distro
    Ubuntu 14.10 Utopic Unicorn

    Re: vostro 2420 boots at full brightness

    lspci -k | grep -A3 VGA

    (no response.)



    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_video()
    ()
    cat: /actual_brightness; No such file or directory
    15

    /sys/class/backlight/intel_backlight
    306
    cat: /actual_brightness; No such file or directory

    4882


    user@user bash > bash2.txt
    (was unable to locate "bash2.txt")

    I couldn't "cut and paste", had to type what i saw, hope this helps
    Last edited by handysmurf; January 19th, 2014 at 06:42 AM. Reason: forgot a minor detail

  4. #4
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: vostro 2420 boots at full brightness

    Quote Originally Posted by 4ysH7XQ View Post
    lspci -k | grep -A3 VGA

    (no response.)
    ??? No video card? This doesn't make sense. Can you post back the complete listing of:
    Code:
    lspci -k
    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_video()
    ()
    cat: /actual_brightness; No such file or directory
    15

    /sys/class/backlight/intel_backlight
    306
    cat: /actual_brightness; No such file or directory

    4882
    This doesn't make sense either. What flavour and version of ubuntu are you using?


    user@user bash > bash2.txt
    (was unable to locate "bash2.txt")

    I couldn't "cut and paste", had to type what i saw, hope this helps
    Don't use this command - it won't work. Open a terminal window, click+drag to highlight the command that I've posted, then middle-button-click (or both-button-click) in the terminal window and it will copy/paste the command.

  5. #5
    Join Date
    Sep 2013
    Location
    Virginia
    Beans
    22
    Distro
    Ubuntu 14.10 Utopic Unicorn

    Re: vostro 2420 boots at full brightness

    ubuntu 11.10 on a dell vostro 2420 laptop, am total newbie.

    didn't have any luck with the (both) click paste either.

    Code:
    00:00.0 Host bridge: Intel Corporation 2nd Generation Core Processor Family DRAM Controller (rev 09)
        Subsystem: Dell Device 0556
        Kernel driver in use: agpgart-intel
    00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09)
        Subsystem: Dell Device 0556
        Kernel driver in use: i915
        Kernel modules: i915
    00:16.0 Communication controller: Intel Corporation Panther Point MEI Controller #1 (rev 04)
        Subsystem: Dell Device 0556
        Kernel driver in use: mei
        Kernel modules: mei
    00:1a.0 USB Controller: Intel Corporation Panther Point USB Enhanced Host Controller #2 (rev 04)
        Subsystem: Dell Device 0556
        Kernel driver in use: ehci_hcd
    00:1b.0 Audio device: Intel Corporation Panther Point High Definition Audio Controller (rev 04)
        Subsystem: Dell Device 0556
        Kernel driver in use: snd_hda_intel
        Kernel modules: snd-hda-intel
    00:1c.0 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 1 (rev c4)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
    00:1c.3 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 4 (rev c4)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
    00:1c.5 PCI bridge: Intel Corporation Panther Point PCI Express Root Port 6 (rev c4)
        Kernel driver in use: pcieport
        Kernel modules: shpchp
    00:1d.0 USB Controller: Intel Corporation Panther Point USB Enhanced Host Controller #1 (rev 04)
        Subsystem: Dell Device 0556
        Kernel driver in use: ehci_hcd
    00:1f.0 ISA bridge: Intel Corporation Panther Point LPC Controller (rev 04)
        Subsystem: Dell Device 0556
        Kernel modules: iTCO_wdt
    00:1f.2 SATA controller: Intel Corporation Panther Point 6 port SATA AHCI Controller (rev 04)
        Subsystem: Dell Device 0556
        Kernel driver in use: ahci
        Kernel modules: ahci
    00:1f.3 SMBus: Intel Corporation Panther Point SMBus Controller (rev 04)
        Subsystem: Dell Device 0556
        Kernel modules: i2c-i801
    07:00.0 Network controller: Atheros Communications Inc. AR9485 Wireless Network Adapter (rev 01)
        Subsystem: Dell Device 0209
        Kernel driver in use: ath9k
        Kernel modules: ath9k
    09:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 07)
        Subsystem: Dell Device 0556
        Kernel driver in use: r8169
        Kernel modules: r8169
    Last edited by Toz; January 19th, 2014 at 08:42 PM. Reason: added code tags

  6. #6
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: vostro 2420 boots at full brightness

    Which of the following sets of commands adjust the brightness:
    Code:
    echo 7 | sudo tee /sys/class/backlight/acpi_video0/brightness
    echo 15 | sudo tee /sys/class/backlight/acpi_video0/brightness
    ...OR:
    Code:
    echo 2441 | sudo tee /sys/class/backlight/intel_backlight/brightness
    echo 4882 | sudo tee /sys/class/backlight/intel_backlight/brightness
    And, for whichever set does change the brightness, try playing around with the value until you get the brightness that you would like at startup. Then post back the information.

    BTW, 11.10 has reached EOL and is no longer being supported. You should consider upgrading.

  7. #7
    Join Date
    Sep 2013
    Location
    Virginia
    Beans
    22
    Distro
    Ubuntu 14.10 Utopic Unicorn

    Re: vostro 2420 boots at full brightness

    echo X | sudo tee /sys/class/backlight/acpi_video0/brightness
    when i use "0" i get full dim,
    when i use "15" i get full bright, "2" is where i'd like to boot.

    echo 2441, or 4882 | sudo tee /sys/class/backlight/intel_backlight/brightness...
    Either one made the screen go black, and I had to use the keyboard function key to recover.


    also... what i'm reading about upgrading, says: To upgrade from Ubuntu 11.10 on a desktop system, start "Update Manager". It should display the following message: "New distribution release '12.04' is available. Click Upgrade and follow the on-screen instructions"...

    update manager shows "your system is up-to-date", and below the window it says "there are no updates to install"

    "notify me of a new ubuntu version:" is set to: "for long-term support version"

    also... i'm not using a mouse, only my laptop's touchpad... can i "paste" in "terminal" with that?
    Last edited by handysmurf; January 20th, 2014 at 09:46 PM. Reason: focused, eleminated rambling

  8. #8
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: vostro 2420 boots at full brightness

    Quote Originally Posted by 4ysH7XQ View Post
    i don't understand, should i copy and enter each line seperately in terminal, and see what happens?
    Yes. Copy/paste or type in directly. What you are looking for is to see which of those commands actually change your brightness level. When we figure that out and what brightness level you want, we can enter it into /etc/rc.local so that it is automatically set on each boot.

    also... what i'm reading about upgrading, says: To upgrade from Ubuntu 11.10 on a desktop system, start "Update Manager". It should display the following message: "New distribution release '12.04' is available. Click Upgrade and follow the on-screen instructions"...

    update manager shows "your system is up-to-date", and below the window it says "there are no updates to install"

    "notify me of a new ubuntu version:" is set to: "for long-term support version"
    Probably best to create a new thread for upgrading your system.

    also... i'm not using a mouse, only my laptop's touchpad... can i "paste" in "terminal" with that?
    Does the touchpad have any buttons? If you select the text then both-button press at the same time in the terminal window, it should past the selected text.

  9. #9
    Join Date
    Sep 2013
    Location
    Virginia
    Beans
    22
    Distro
    Ubuntu 14.10 Utopic Unicorn

    Re: vostro 2420 boots at full brightness

    Results are:
    echo X | sudo tee /sys/class/backlight/acpi_video0/brightness
    when i use "0" i get full dim,
    when i use "15" i get full bright, "2" is where i'd like to boot.

    echo 2441, or 4882 | sudo tee /sys/class/backlight/intel_backlight/brightness...
    Either one made the screen go black, and I had to use the keyboard function key to recover.

  10. #10
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: vostro 2420 boots at full brightness

    Quote Originally Posted by 4ysH7XQ View Post
    Results are:
    echo X | sudo tee /sys/class/backlight/acpi_video0/brightness
    when i use "0" i get full dim,
    when i use "15" i get full bright, "2" is where i'd like to boot.
    Here is what you need to do to make it start at that brightness at startup:

    1. Open the /etc/rc.local file for editing with root privileges:
    Code:
    sudo -i gedit /etc/rc.local
    2. Enter the following line above the "exit 0" line:
    Code:
    echo 2 > /sys/class/backlight/acpi_video0/brightness
    3. Save the file and reboot to test.

Page 1 of 2 12 LastLast

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •