i915/kms/backlight-combo mode problem (was: Re: Linux 2.6.39-rc5)

Melchior FRANZ melchior.franz at gmail.com
Sat Apr 30 04:34:51 PDT 2011

Dropping Linus from the CC.

* Takashi Iwai -- Saturday 30 April 2011:
* * At Sat, 30 Apr 2011 10:32:04 +0200, Melchior FRANZ wrote:
> > Yes, backlight adjustment generally works on this notebook, but only
> > with "acpi_osi=Linux" on the command line.
> acpi_osi quirk should be better added statically, then.

No, I guess the problem here is that acer_wmi doesn't support this
machine yet. I told the ACER WMI maintainer and sent a DSDT image,
but this message was thoroughly ignored.

  $ dmesg|grep -i acer
  [    0.000000] DMI: Acer TM5735/BA51_MV, BIOS V1.04 09/23/2010
  [   71.850534] acer_wmi: Acer Laptop ACPI-WMI Extras
  [   72.350278] acer_wmi: Unable to detect available WMID devices
  Machine: Acer Travelmate 5735Z-452G32Mnss


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