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Thread: Sony Vaio E-Series Brightness Issue

  1. #1
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    Sony Vaio E-Series Brightness Issue

    Hi everyone!

    I hope to find help here!

    I have similar problems like the others here on my Sony Vaio E-Series.
    It looks like my laptop has nearly the same behavior like dsuresh's.
    So I tried the solution of matt_symes. (http://ubuntuforums.org/showpost.php...5&postcount=10)

    After that I have also 2 entries in /sys/class/backlight
    acpi_video0 has changed to sony.

    I know that my Fn-keys control the "brightness" file within acpi_video0 or sony folder.

    Via terminal I'm able to control the brightness within the intel_backlight folder and it works!

    How can I teach my Ubuntu 12.04 to control via Fn-Keys the brightness with the intel_backlight - driver?

    Thanks for any suggestions!
    Last edited by Toz; July 26th, 2012 at 02:17 AM. Reason: Moved post to new thread and linked to original

  2. #2
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    Re: Sony Vaio E-Series Brightness Issue

    Hello and welcome to the forums. I created a new thread for your issue as the other thread was old and dated.

    Can you try matt_symes' suggestion again, and after reboot, post back the results of:
    Code:
    cat /proc/cmdline
    Also, does this laptop have an intel video card? Can you run the following command and post back the results:
    Code:
    sudo lspci -vnn | grep -A12 VGA

  3. #3
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    Re: Sony Vaio E-Series Brightness Issue

    Hi Toz!

    Thanks for your reply and sorry that i didn't open a new thread!

    So, my results:

    max@Sony-Vaio:~$ cat /proc/cmdline
    BOOT_IMAGE=/boot/vmlinuz-3.2.0-27-generic root=UUID=f8ff59d6-fae1-47ed-99f6-9bc5fe1e1773 ro acpi_backlight=vendor quiet splash acpi_backlight=vendor vt.handoff=7

    The video card is an Intel HD Graphics 3000 which is integrated into the CPU. That's the only one built-in in my laptop.

    max@Sony-Vaio:~$ sudo lspci -vnn | grep -A12 VGA
    00:02.0 VGA compatible controller [0300]: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller [8086:0126] (rev 09) (prog-if 00 [VGA controller])
    Subsystem: Sony Corporation Device [104d:90ac]
    Flags: bus master, fast devsel, latency 0, IRQ 44
    Memory at c4000000 (64-bit, non-prefetchable) [size=4M]
    Memory at b0000000 (64-bit, prefetchable) [size=256M]
    I/O ports at 5000 [size=64]
    Expansion ROM at <unassigned> [disabled]
    Capabilities: [90] MSI: Enable+ Count=1/1 Maskable- 64bit-
    Capabilities: [d0] Power Management version 2
    Capabilities: [a4] PCI Advanced Features
    Kernel driver in use: i915
    Kernel modules: i915

  4. #4
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    Re: Sony Vaio E-Series Brightness Issue

    No worries. Can you also post back the contents of /etc/default/grub and the results of the following commands:
    Code:
    ls /sys/class/backlight
    Code:
    lsmod
    Code:
    sudo dmidecode -s system-manufacturer
    Code:
    sudo dmidecode -s system-product-name

  5. #5
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    Re: Sony Vaio E-Series Brightness Issue

    /etc/default/grub
    Code:
    # If you change this file, run 'update-grub' afterwards to update
    # /boot/grub/grub.cfg.
    # For full documentation of the options in this file, see:
    #   info -f grub -n 'Simple configuration'
    
    GRUB_DEFAULT=0
    GRUB_HIDDEN_TIMEOUT=0
    GRUB_HIDDEN_TIMEOUT_QUIET=true
    GRUB_TIMEOUT=10
    GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
    GRUB_CMDLINE_LINUX="acpi_backlight=vendor"
    
    # Uncomment to enable BadRAM filtering, modify to suit your needs
    # This works with Linux (no patch required) and with any kernel that obtains
    # the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
    #GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"
    
    # Uncomment to disable graphical terminal (grub-pc only)
    #GRUB_TERMINAL=console
    
    # The resolution used on graphical terminal
    # note that you can use only modes which your graphic card supports via VBE
    # you can see them in real GRUB with the command `vbeinfo'
    #GRUB_GFXMODE=640x480
    
    # Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
    #GRUB_DISABLE_LINUX_UUID=true
    
    # Uncomment to disable generation of recovery mode menu entries
    #GRUB_DISABLE_RECOVERY="true"
    
    # Uncomment to get a beep at grub start
    #GRUB_INIT_TUNE="480 440 1"

    ls /sys/class/backlight

    Code:
    intel_backlight  sony



    lsmod

    Code:
    Module                  Size  Used by
    pci_stub               12622  1 
    vboxpci                23200  0 
    vboxnetadp             25670  0 
    vboxnetflt             23441  0 
    vboxdrv               287130  3 vboxpci,vboxnetadp,vboxnetflt
    parport_pc             32866  0 
    ppdev                  17113  0 
    rfcomm                 47604  0 
    bnep                   18281  2 
    snd_hda_codec_hdmi     32474  1 
    snd_hda_codec_realtek   223962  1 
    joydev                 17693  0 
    acer_wmi               28418  0 
    sparse_keymap          13890  1 acer_wmi
    uvcvideo               72627  0 
    videodev               98259  1 uvcvideo
    v4l2_compat_ioctl32    17128  1 videodev
    btusb                  18288  0 
    bluetooth             180104  11 rfcomm,bnep,btusb
    snd_hda_intel          33773  3 
    snd_hda_codec         127706  3 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel
    snd_hwdep              13668  1 snd_hda_codec
    snd_pcm                97188  3 snd_hda_codec_hdmi,snd_hda_intel,snd_hda_codec
    snd_seq_midi           13324  0 
    arc4                   12529  2 
    snd_rawmidi            30748  1 snd_seq_midi
    snd_seq_midi_event     14899  1 snd_seq_midi
    psmouse                87692  0 
    serio_raw              13211  0 
    snd_seq                61896  2 snd_seq_midi,snd_seq_midi_event
    sony_laptop            45393  0 
    snd_timer              29990  2 snd_pcm,snd_seq
    snd_seq_device         14540  3 snd_seq_midi,snd_rawmidi,snd_seq
    ath9k                 132390  0 
    mac80211              506816  1 ath9k
    wmi                    19256  1 acer_wmi
    ath9k_common           14053  1 ath9k
    ath9k_hw              411112  2 ath9k,ath9k_common
    ath                    24067  3 ath9k,ath9k_common,ath9k_hw
    snd                    78855  16 snd_hda_codec_hdmi,snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_pcm,snd_rawmidi,snd_seq,snd_timer,snd_seq_device
    cfg80211              205544  3 ath9k,mac80211,ath
    rts_pstor             445196  0 
    mac_hid                13253  0 
    soundcore              15091  1 snd
    snd_page_alloc         18529  2 snd_hda_intel,snd_pcm
    i915                  472897  3 
    drm_kms_helper         46978  1 i915
    mei                    41616  0 
    drm                   242038  4 i915,drm_kms_helper
    i2c_algo_bit           13423  1 i915
    video                  19596  1 i915
    lp                     17799  0 
    parport                46562  3 parport_pc,ppdev,lp
    usbhid                 47199  0 
    hid                    99559  1 usbhid
    r8169                  62099  0


    sudo dmidecode -s system-manufacturer
    Code:
    Sony Corporation
    sudo dmidecode -s system-product-name
    Code:
    SVE1711C5E
    Last edited by KarlMax; July 27th, 2012 at 12:22 AM.

  6. #6
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    Re: Sony Vaio E-Series Brightness Issue

    Okay. A few things to try.

    1. Try changing acpi_backlight=vendor to acpi_backlight=video. In your /etc/default/grub file, you only need one entry:
    Code:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video"
    GRUB_CMDLINE_LINUX=""
    ...save file, run sudo update-grub and reboot.

    If that doesn't work...

    2. Try unloading the sony_laptop module:
    Code:
    sudo modprobe -r sony_laptop
    Does this remove the sony backlight interface? Do the brightness keys work?

    If that doesn't work...

    3. Here is a workaround that you could use that should at least control the brightness (http://ubuntuforums.org/showpost.php...5&postcount=50)

  7. #7
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    Re: Sony Vaio E-Series Brightness Issue

    GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=video"
    GRUB_CMDLINE_LINUX=""
    didn't work!

    Code:
    sudo modprobe -r sony_laptop
    has no effect on /sys/class/backlight. And no, the Fn-Brightness-keys don't work anymore.

    So I tried that workaround: http://ubuntuforums.org/showpost.php...5&postcount=50

    I'm very sorry to say that it had absolutely no effect!
    I also tried to manipulate the script brightdown.sh in etc/acpi to see if there's any effect:
    Code:
    #!/bin/bash
    
    curr=`cat /sys/class/backlight/intel_backlight/actual_brightness`
    if [ $curr -gt 0 ]; then
    curr=$((curr-1));
    echo $curr  > /sys/class/backlight/intel_backlight/brightness;
    fi
    I changed acpi_video0 into intel_backlight because if I try to set brightness-levels via terminal (which works), I have to manipulate files in that directory.

    So, nothing has changed since my first post.
    Is it possible, that there is a problem with the brightness-levels inside /sys/class/backlight/acpi_video0 and /sys/class/backlight/intel_backlight?
    File max__brightness inside intel_backlight-directory contains 4882.
    File max__brightness inside acpi_video0-directory contains 15.

    I tried the original scripts from fugu72's post and my edited script. There's no different effect within acpi_video0 and intel_backlight-directories, as the scripts won't exist.

    Ah, and I checked if my keycodes are the same as in fugu72's post. (acpi_listen) They are!
    Last edited by KarlMax; July 27th, 2012 at 12:33 PM.

  8. #8
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    Re: Sony Vaio E-Series Brightness Issue

    File max__brightness inside intel_backlight-directory contains 4882.
    What is the value of actual_brightness?

    What happens if you set /sys/class/backlight/intel_backlight/brightness to 2441 (half of max_brightness)? Does the brightness dim in half?

    If it does, perhaps try this version of the scripts would work:

    /etc/acpi/brightdown.sh
    Code:
    #!/bin/bash
    
    curr=`cat /sys/class/backlight/intel_backlight/actual_brightness`
    if [ $curr -gt 0 ]; then
    curr=$((curr-610));
    echo $curr  > /sys/class/backlight/intel_backlight/brightness;
    fi
    etc/acpi/brightup.sh
    Code:
    #!/bin/bash
    
    curr=`cat /sys/class/backlight/intel_backlight/actual_brightness`
    if [ $curr -lt 4882 ]; then
    curr=$((curr+610));
    echo $curr  > /sys/class/backlight/intel_backlight/brightness;
    fi
    Last edited by Toz; July 27th, 2012 at 03:19 PM.

  9. #9
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    Re: Sony Vaio E-Series Brightness Issue

    I'm able to set any brightness-level from 0 - 4882 via terminal as I mentioned above. Maybe not elaborately enough. Sorry!

    I use the following code to set brightness:
    Code:
    echo XXXX | sudo tee - /sys/class/backlight/intel_backlight/brightness
    XXXX stands for any value from 0 - 4882
    And that works!!!

    The problem is, that I need root-privileges to set my screen-brightness. That's a bit too heavy secure for me.

    Your scripts don't work!
    I think I need a technique to set a value in /sys/class/backlight/intel_backlight/brightness without needing root-privileges.

    The Fn-brightness-keys are able to do that in /sys/class/backlight/acpi_video0/brightness.
    I checked that!

  10. #10
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    Re: Sony Vaio E-Series Brightness Issue

    From that previously-linked post, can you post back the contents of these files:
    - /etc/acpi/events/sony-brightness-up
    - /etc/acpi/events/sony-brightness-down
    - /etc/acpi/brightdown.sh
    - /etc/acpi/brightup.sh

    and the results of this command:
    Code:
    ls -l /etc/acpi/bright*

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