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Thread: Sony VAIO VPCS136FG Brightness Problem

  1. #1
    Join Date
    Oct 2013
    Beans
    3

    Sony VAIO VPCS136FG Brightness Problem

    I have a sony vaio vpcs136fg laptop. what ever i've done, i was not able to change my laptop brightness. even setpci do not change the laptop brightness. the graphic card is NVIDIA GT218M [GeForce 310M] (rev a2) and it's pci configuration space dump is listed below:

    Notes:
    1. the brightness is locked @ maximum.
    2. changing /sys/class/acpi_video0/brightness does not affect the brightness
    3. using xbacklight does not change the brightness
    4. passing kernel parameters does not change brightness

    Probable problem:
    Lately before I install Linux, I was using windows 7 with sony care center application on it. sony care center has an option called Auto Brightness. as long as that option was turned on, windows could not change the brightness and everything controlled under that option. When I installed linux, that option was enabled in windows. It might cause of the mess here. I don't want to change the OS to try if it is the problem or not (cause I repartitioned my hard drive and I really don't want to see that Microsoft Logo again)

    Note:
    I tried vaio forums but there was no answer.
    I tried GeForce forum, but there was no answer.

    Code:
    01:00.0 VGA compatible controller: NVIDIA Corporation GT218M [GeForce 310M] (rev a2)
    
    00: de 10 75 0a 07 00 10 00 a2 00 00 03 00 00 80 00
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    thanx in advance
    XinOxaR

  2. #2
    Join Date
    Jun 2005
    Location
    Toronto, Canada
    Beans
    Hidden!
    Distro
    Xubuntu Development Release

    Re: Sony VAIO VPCS136FG Brightness Problem

    Hello and welcome to the forums.

    Some questions, comments and suggestions:

    1. Are you using the opensource nouveau driver or the proprietary nvidia driver?
    Code:
    lspci -k | grep -A3 VGA
    2. How many backlight interfaces do you have? Is it just acpi_video0 or are there other directories at the /sys/class/backlight level?
    Code:
    for i in /sys/class/backlight/*; do echo $i; cat $i/brightness; cat $i/actual_brightness; cat $i/max_brightness; done
    3. Which kernel parameters have you tried? And how has each parameter changed the number and type of backlight interfaces available? And are you able to manually echo values into the brightness file of each backlight interface and affect screen brightness?

    4. Have you tried the acpi_osi=\"!Windows 2012\" kernel parameter? The relevant lines in /etc/default/grub should look like this:
    Code:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet rw"
    GRUB_CMDLINE_LINUX="acpi_osi=\"!Windows 2012\""
    5. Have you tried the "EnableBrightnessControl=1" xorg setting? This settings seems to help some nvidia cards.

    6. Which modules are running (that may be interfering with brightness):
    Code:
    lsmod
    7. Have you had a look at the nvidiabl module? Looks like the VPCS1* is supported.

    Sorry for the laundry list. Let me know if you need more information about any of the points.

  3. #3
    Join Date
    Oct 2013
    Beans
    3

    Re: Sony VAIO VPCS136FG Brightness Problem

    Quote Originally Posted by Toz View Post
    Hello and welcome to the forums.
    Thank you



    Quote Originally Posted by Toz View Post
    1. Are you using the opensource nouveau driver or the proprietary nvidia driver?
    Code:
    lspci -k | grep -A3 VGA
    I'm using nvidia proprietary driver

    Code:
    01:00.0 VGA compatible controller: NVIDIA Corporation GT218M [GeForce 310M] (rev a2)
        Subsystem: Sony Corporation Device 9069
        Kernel driver in use: nvidia
        Kernel modules: nouveau, nvidia

    Quote Originally Posted by Toz View Post
    2. How many backlight interfaces do you have? Is it just acpi_video0 or are there other directories at the /sys/class/backlight level?
    I guess it's just one interface

    Code:
    #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
    7
    7
    8

    Quote Originally Posted by Toz View Post
    3. Which kernel parameters have you tried? And how has each parameter changed the number and type of backlight interfaces available? And are you able to manually echo values into the brightness file of each backlight interface and affect screen brightness?
    I have tried:

    1. acpi_osi=Linux acpi_backlight=vendor
    Result: the gnome back-light indicator won't appear at all

    2. acpi_osi=Linux acpi_backlight=legacy
    Result: nothing changes


    Quote Originally Posted by Toz View Post
    4. Have you tried the acpi_osi=\"!Windows 2012\" kernel parameter? The relevant lines in /etc/default/grub should look like this:
    Code:
    GRUB_CMDLINE_LINUX_DEFAULT="quiet rw"
    GRUB_CMDLINE_LINUX="acpi_osi=\"!Windows 2012\""
    No, I did not tried that one. My boot loader is syslinux. I will try it as soon as "badblocks" finished checking my external H.D.D


    Quote Originally Posted by Toz View Post
    5. Have you tried the "EnableBrightnessControl=1" xorg setting? This settings seems to help some nvidia cards.
    Yes, not work. Currently I'm saving my eyes with Nvidia setting which changes the gamma to simulate the brightness control.

    Quote Originally Posted by Toz View Post
    6. Which modules are running (that may be interfering with brightness):
    Code:
    lsmod
    Code:
    tun                    19624  2 
    hid_generic             1153  0 
    usbhid                 41466  0 
    hid                    88758  2 hid_generic,usbhid
    usb_storage            47847  2 
    fuse                   74541  3 
    rfcomm                 51153  8 
    bnep                   11069  2 
    nls_cp437               5953  2 
    vfat                   10055  2 
    fat                    51827  1 vfat
    snd_hda_codec_hdmi     30336  4 
    joydev                  9663  0 
    snd_hda_codec_realtek    37032  1 
    intel_powerclamp        8802  0 
    btusb                  18496  0 
    coretemp                6326  0 
    kvm_intel             129393  0 
    uvcvideo               72804  0 
    videobuf2_vmalloc       3272  1 uvcvideo
    videobuf2_memops        2335  1 videobuf2_vmalloc
    videobuf2_core         27797  1 uvcvideo
    bluetooth             308340  22 bnep,btusb,rfcomm
    videodev              110188  2 uvcvideo,videobuf2_core
    kvm                   379223  1 kvm_intel
    arc4                    2000  2 
    media                  11591  2 uvcvideo,videodev
    snd_hda_intel          36520  5 
    iwldvm                172354  0 
    mac80211              453808  1 iwldvm
    crc32_pclmul            3019  0 
    crc32c_intel           14249  0 
    ghash_clmulni_intel     4501  0 
    aesni_intel            46124  0 
    aes_x86_64              7399  1 aesni_intel
    nvidia              11250487  53 
    snd_hda_codec         148129  3 snd_hda_codec_realtek,snd_hda_codec_hdmi,snd_hda_intel
    lrw                     3565  1 aesni_intel
    snd_hwdep               6332  1 snd_hda_codec
    gf128mul                5858  1 lrw
    glue_helper             4609  1 aesni_intel
    ablk_helper             1972  1 aesni_intel
    cryptd                  8473  3 ghash_clmulni_intel,aesni_intel,ablk_helper
    sony_laptop            39919  0 
    psmouse                85356  0 
    snd_pcm                77765  3 snd_hda_codec_hdmi,snd_hda_codec,snd_hda_intel
    snd_page_alloc          7234  2 snd_pcm,snd_hda_intel
    iwlwifi               137145  1 iwldvm
    intel_ips              12492  0 
    iTCO_wdt                5407  0 
    iTCO_vendor_support     1929  1 iTCO_wdt
    snd_timer              18718  1 snd_pcm
    atl1c                  36898  0 
    cfg80211              402729  3 iwlwifi,mac80211,iwldvm
    snd                    59141  17 snd_hda_codec_realtek,snd_hwdep,snd_timer,snd_hda_codec_hdmi,snd_pcm,snd_hda_codec,snd_hda_intel
    microcode              13488  0 
    serio_raw               5041  0 
    pcspkr                  2027  0 
    soundcore               5450  1 snd
    rfkill                 15698  6 cfg80211,sony_laptop,bluetooth
    thermal                 8620  0 
    battery                 6925  0 
    evdev                  10693  15 
    ac                      3324  0 
    acpi_cpufreq           10867  1 
    i2c_i801               11269  0 
    lpc_ich                13112  0 
    intel_agp              10872  0 
    i2c_core               23720  3 i2c_i801,nvidia,videodev
    intel_gtt              12664  1 intel_agp
    shpchp                 25457  0 
    mperf                   1267  1 acpi_cpufreq
    mei_me                  9296  0 
    mei                    61875  1 mei_me
    processor              24917  1 acpi_cpufreq
    ext4                  470412  3 
    crc16                   1359  2 ext4,bluetooth
    mbcache                 5866  1 ext4
    jbd2                   83376  1 ext4
    sr_mod                 14898  0 
    cdrom                  34848  1 sr_mod
    sd_mod                 30899  8 
    mxm_wmi                 1467  0 
    ehci_pci                4120  0 
    ehci_hcd               48084  1 ehci_pci
    ahci                   22888  5 
    libahci                21393  1 ahci
    sdhci_pci              12138  0 
    libata                171318  2 ahci,libahci
    scsi_mod              128695  4 usb_storage,libata,sd_mod,sr_mod
    usbcore               178049  6 btusb,uvcvideo,usb_storage,ehci_hcd,ehci_pci,usbhid
    firewire_ohci          31869  0 
    firewire_core          52227  1 firewire_ohci
    sdhci                  29076  1 sdhci_pci
    crc_itu_t               1363  1 firewire_core
    mmc_core               95506  2 sdhci,sdhci_pci
    usb_common              1648  1 usbcore
    wmi                     8347  1 mxm_wmi
    video                  11380  0 
    button                  4669  0
    Quote Originally Posted by Toz View Post
    7. Have you had a look at the nvidiabl module? Looks like the VPCS1* is supported.
    No, I will try it as soon as my H.D.D recovery got finished.

    Quote Originally Posted by Toz View Post
    Sorry for the laundry list. Let me know if you need more information about any of the points.
    It would be great if you can help me solve this problem.
    Last edited by XinOxaR; October 2nd, 2013 at 11:51 PM.

  4. #4
    Join Date
    Oct 2013
    Beans
    3

    Thumbs up Re: Sony VAIO VPCS136FG Brightness Problem

    I tried acpi_osi="!windows 2012"
    Result: brightness not works

    Nvidiabl works!!! Finally.
    @Toz: You have saved my eyes. thank you.

    Regards,
    XinOxaR
    Last edited by XinOxaR; October 3rd, 2013 at 08:13 AM. Reason: misunderstanding

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