Latest working kernel version: 2.6.25.7 Earliest failing kernel version: Distribution: Pardus Hardware Environment: Sony Vaio FZ11M laptop Software Environment: Problem Description: Brightness don't working Steps to reproduce: Brightness don't working sony vaio fz series.
Created attachment 16575 [details] lspci
Does the brightness work after loading driver sony-acpi? Does the brightness work after loading driver sony-laptop? Is there any chance that you can find something under /sys/class/backlight/? Please attach the acpidump and dmesg output.
shogen inanc # modprobe -l | grep sony /lib/modules/2.6.25.7-99/kernel/drivers/misc/sony-laptop.ko /lib/modules/2.6.25.7-99/kernel/drivers/char/sonypi.ko sony-acpi module not found and sonypi, sony-laptop modules is load. shogen inanc # ls /sys/class/backlight/ shogen inanc # it's empty.
Created attachment 16576 [details] dmesg
Created attachment 16577 [details] lsmod
Created attachment 16580 [details] acpidump
Weird, please make sure the /sys/class/backligh/ is still empty when the ACPI video driver is loaded, please attach the result of "grep . /proc/acpi/video/*/*/*".
Hi, Inanc From the acpidump it seems that there is no _BQC object in your laptop. Will you please try the patch in http://bugzilla.kernel.org/show_bug.cgi?id=10206#c13 and see whether the problem still exists? Thanks.
shogen / # ls /proc/acpi/video/GFX0/ DD01 DD02 DD03 DD04 DD05 DOS info POST POST_info ROM shogen GFX0 # ls * DOS info POST POST_info ROM DD01: brightness EDID info state DD02: brightness EDID info state DD03: brightness EDID info state DD04: brightness EDID info state DD05: brightness EDID info state DD01,DD02,DD03,DD05 under brightness is empty. DD04 is shogen DD04 # cat brightness levels: 100 100 4 16 28 40 52 64 76 88 100 current: 4
i tried patch and; shogen backlight # ls /sys/class/backlight/ acpi_video0 shogen backlight # ls /sys/class/backlight/acpi_video0/ actual_brightness bl_power brightness max_brightness power subsystem uevent I change brightness file echo 3 >brightness shogen acpi_video0 # echo 3 >brightness and shogen acpi_video0 # cat brightness 3 but lcd backlight don't change.
> Latest working kernel version: 2.6.25.7 This seems to conflict with the later comments which show failures using /lib/modules/2.6.25.7-99 What is the newest kernel that works properly and what is the oldest kernel that starts failing? > /lib/modules/2.6.25.7-99/kernel/drivers/misc/sony-laptop.ko > /lib/modules/2.6.25.7-99/kernel/drivers/char/sonypi.ko Please test with these drivers absent, and with just the sony-laptop driver present.
I don't get your question, sorry. The problem I face has always been present. Is there anything more that I can do for you?
Please do this: # rmmod sonypi # rmmod sony-laptop # modprobe video And verify that the problem still occurs then # modprobe sony-laptop And verify that the problem still occurs. Where "problem" means no /sys/class/backlight/ and non-functional /proc/acpi/video
shogen inanc # rmmod sonypi shogen inanc # rmmod sony-laptop shogen inanc # modprobe video shogen inanc # depmod -a shogen inanc # lsmod | grep sony shogen inanc # lsmod | grep video video 23696 0 output 7680 1 video videodev 33152 1 usbcam v4l1_compat 16260 1 videodev videobuf_dma_sg 17156 1 usbcam videobuf_core 21764 2 usbcam,videobuf_dma_sg and problem still occurs after it. after; shogen inanc # modprobe sony-laptop shogen inanc # depmod -a shogen inanc # lsmod | grep sony sony_laptop 36060 0 and problem still occurs after it. /sys/class/backlight/ and /proc/acpi/video non-functional.
ping
It seems that after the patch is applied, the /sys/class/backlight/ interface exists but the backlight brightness can't be changed. Will you please confirm whether the brightness can be changed after the pressing hot-key? It is noted that sony-laptop should be loaded. Thanks.
Yes. "It seems that after the patch is applied, the /sys/class/backlight/ interface exists but the backlight brightness can't be changed." Pressing the hotkeys is not changing the brightness after the patch applied and before applied. sony-laptop module is loaded during all this processes.
Okay, It seems that the standard _BCM method, which pokes the graphics device pci config space LBB register, doesn't work on your laptops. I don't know if this is normal, but I'll ask some graphics guys later. :) then we have some other ways to make the backlight work for you, 1. check if there are any platform specific methods to control the brightness which is not supported by sony-laptop driver currently. cc Mattia Dongili, the maintainer of sony-laptop driver and see if he has some ideas. :) 2. in X mode, you can use xrandr/xbacklight to change the brightness, which pokes the native graphics device register.
Hi, sorry, I've been holding off for a while from this thread. The FZ series is not supported by sony-laptop. Backlight support in sony-laptop is bound to the SPIC device (SNY6001) which is not available on the FZ (and other) series. To make things worse this laptop is carrying an NVidia card so if there is some tool that can dim your screenlight is most probably some NVidia utility. You may want to try nvclock but only a limited number of NVidia chipsets are supported. Hope this helps -- mattia
(In reply to comment #20) > To make things worse this laptop is carrying an NVidia card Hah, this answers why the _BCM method can not work for you. the AML code assumes the laptop has a Intel integrated graphics card, and pokes the LBB register of pci device 00:02.0. so Mattia is right, you need some nvidia utility to change the backlight. Please also check if there is any BIOS update. Anyway, this is not a Linux/ACPI problem. re-assign this bug to video category.
Sending please lspci -n command print ? Thanks
Created attachment 17843 [details] lspci -n