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Thread: Sony E series brightness control not working in 12.10

  1. #11
    Join Date
    Dec 2012
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    8

    Re: Sony E series brightness control not working in 12.10

    Hi. The 3 commands that you asked me to try did not adjust the brightness so I've run the commands to report on the video card. This is the output;

    01:00.0 VGA compatible controller [0300]: Advanced Micro Devices [AMD] nee ATI Thames [Radeon 7500M/7600M Series] [1002:6841] (prog-if 00 [VGA controller])
    Subsystem: Sony Corporation Device [104d:90ac]
    Flags: bus master, fast devsel, latency 0, IRQ 45
    Memory at b0000000 (64-bit, prefetchable) [size=256M]
    Memory at c4000000 (64-bit, non-prefetchable) [size=128K]
    I/O ports at 5000 [size=256]
    Expansion ROM at c4040000 [disabled] [size=128K]
    Capabilities: [50] Power Management version 3
    Capabilities: [58] Express Legacy Endpoint, MSI 00
    Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
    Capabilities: [150] Advanced Error Reporting
    Kernel driver in use: radeon



    I don't know if it's relevant but when I was running 12.04 LTS the brightness control worked just fine, but I was using the proprietary AMD drivers (fglrx). I can't test this theory in 12.10, because the proprietary driver is not supported by the new version of X-server and consequently Unity does not run.

    Regards, Dave.

  2. #12
    Join Date
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    Toronto, Canada
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    Xubuntu 14.04 Trusty Tahr

    Re: Sony E series brightness control not working in 12.10

    Quote Originally Posted by djpeck1 View Post
    I don't know if it's relevant but when I was running 12.04 LTS the brightness control worked just fine, but I was using the proprietary AMD drivers (fglrx). I can't test this theory in 12.10, because the proprietary driver is not supported by the new version of X-server and consequently Unity does not run.
    Yes, I'm thinking that this is why you're not getting brightness control in 12.10. I can't seem to manipulate the backlight interface manually. Can you post back the contents of your dmesg and Xorg log files via:
    Code:
    pastebinit /var/log/dmesg
    pastebinit /var/log/Xorg.0.log
    ...and post back the links that are generated? I want to see if there is anything in there that might help.

    Also, one more long shot, do the following commands affect brightness?
    Code:
    sudo setpci -s 01:00.0 F4.B=96
    sudo setpci -s 01:00.0 F4.B=00
    sudo setpci -s 01:00.0 F4.B=FF
    xrandr --output default --brightness 0.5
    xrandr --output default --brightness 1.0
    Last edited by Toz; December 11th, 2012 at 02:32 PM.

  3. #13
    Join Date
    Dec 2012
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    8

    Re: Sony E series brightness control not working in 12.10

    Hi.
    The first pasteinit is http://paste.ubuntu.com/1425381/ (dmesg)
    The scond is http://paste.ubuntu.com/1425387/ (Xorg)

    The three setpci commands did not affect the brightness and the two xrandr commands gave the following messages;

    warning: output default not found; ignoring
    xrandr: Need crtc to set gamma on.


    but did not affect the brightness.

    Please let me know if you find anything interesting in the log files.

    Regards, Dave.

  4. #14
    Join Date
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    Toronto, Canada
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    Xubuntu 14.04 Trusty Tahr

    Re: Sony E series brightness control not working in 12.10

    From your dmesg log:
    sony_laptop: brightness ignored, must be controlled by ACPI video driver
    ...and yet ACPI video can't control brightness. Might be related to: https://bugs.launchpad.net/ubuntu/+s...x/+bug/1005196 but according to that bug report, a patch was applied to kernel 3.5 rc5 and you're already running that kernel.

    I think you should create a bug report:
    Code:
    ubuntu-bug linux
    ...and have the devs look at it.

  5. #15
    Join Date
    Dec 2012
    Beans
    8

    Re: Sony E series brightness control not working in 12.10

    Hi Toz.

    Thanks for all your help with this. It is much appreciated.

    I will do as you suggest and raise a bug report.

    I have also noticed that ATI have recently released a proprietary driver for my graphics adapter that is not yet available in the Ubuntu repositories. I might download that and give it a try.

    Regards, Dave.

  6. #16
    Join Date
    Aug 2010
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    7

    Re: Sony E series brightness control not working in 12.10

    Does anyone have an update on this? 100% screen brightness by default is seriously influencing the autonomy on 12.10. Even after using powertop I get less than 3 hours...

  7. #17
    Join Date
    May 2013
    Beans
    3

    Re: Sony E series brightness control not working in 12.10

    Hi Toz,

    I too have the same problem.
    Brightness control doesn't work with the function key on sony E series laptop on ubuntu 12.10.
    I tried updating in grub but still it didn't work for me.

    And here is the output of what u have asked.

    chetan@chetan-SVE15115ENB:~$ for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done
    /sys/class/backlight/acpi_video0
    0
    15
    chetan@chetan-SVE15115ENB:~$ acpi_listen
    sony/hotkey SNC 00000001 00000010
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000010
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000010
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    sony/hotkey SNC 00000001 0000003b
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 00000011
    sony/hotkey SNC 00000001 0000003b
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    sony/hotkey SNC 00000001 0000003b
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000010
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b


    Kindly help me to control the brightness.

    really my eyes are burning with this full brightness

    Thanks
    Chetan C R

  8. #18
    Join Date
    May 2013
    Beans
    3

    Angry Brightness control is not working in Sony E series Laptop on Ubuntu 12.10

    Hello All,

    I am running Ubuntu 12.10 on Sony E series Laptop

    Brightness Control is not working (Fn F5/F6 ) is not working
    The brightness remains same for all values (0-15)

    I tried to update from the grub it didn't work for me.

    Below is the output of commands acpi_listen with brightness + ans - function keys pressed.

    chetan@chetan-SVE15115ENB:~$ for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/max_brightness; done
    /sys/class/backlight/acpi_video0
    0
    15
    chetan@chetan-SVE15115ENB:~$ acpi_listen
    sony/hotkey SNC 00000001 00000010
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000010
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000010
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    sony/hotkey SNC 00000001 0000003b
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 00000011
    sony/hotkey SNC 00000001 0000003b
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sonyl/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011
    sony/hotkey SNC 00000001 0000003b
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 00000011
    video PEGP 00000081 00000000
    sony/hotkey SNC 00000001 0000003b
    sony/hotkey SNC 00000001 00000011




    Kindly help me to solve this problems

  9. #19
    Join Date
    Oct 2009
    Location
    Reykjavík, Ísland
    Beans
    9,994
    Distro
    Lubuntu 14.10 Utopic Unicorn

    Re: Sony E series brightness control not working in 12.10

    Threads merged.
    Please don't post multiple threads on the same subject.
    About problems due to upgrading
    Bringing old hardware back to life.
    Please visit Quick Links -> Unanswered Posts

  10. #20
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu 14.04 Trusty Tahr

    Re: Sony E series brightness control not working in 12.10

    @chetancr9, does your Sony model come with an AMD video card?
    Code:
    sudo lspci -vnn | grep -A15 VGA
    ...If so, have you installed the proprietary drivers?

    Does the following command change the brightness?
    Code:
    echo 7 | sudo tee /sys/class/backlight/acpi_video0/brightness
    What kernel boot kernel parameters are you using?
    Code:
    cat /proc/cmdline
    ...have you tried the acpi_backlight=vendor parameter?

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