sony-vaio-z-series team mailing list archive

[vick <weasalandme@xxxxxxxxx>]

> [ 3931.649170] sony_laptop: acpi_callreadfunc failed
> [ 3931.649175] sony_laptop: Determined GFX switch ACPI path as
> \_SB.PCI0.OVGA._DSM.
> [ 3931.649183] sony_laptop: acpi_callreadfunc failed
> [ 3931.649196] \_SB.PCI0.OVGA._DSM failed: 5, func 3, para, 2.
> [ 3931.649205] \_SB.PCI0.OVGA._DSM failed: 5, func 2, para, 17.
> [ 3931.650395] sony_laptop: found Vaio model ID: 18485
> [ 3931.673773] input: Sony Vaio Keys as
> /devices/LNXSYSTM:00/device:00/PNP0A08:00/device:01/SNY5001:00/input/input9
> [ 3931.673972] input: Sony Vaio Jogdial as /devices/virtual/input/input10
> [ 3931.674089] sony_laptop: brightness ignored, must be controlled by
> ACPI video driver

I have the exact same output including the model ID so I'm guessing there is something else that's interfering, maybe some gnome app or something. Try booting into single user mode, reload the sony-laptop module and see if you can control the brightness via /sys