Hi Melchior,
於 一，2011-05-02 於 14:08 +0200，Takashi Iwai 提到：
At Sat, 30 Apr 2011 13:34:51 +0200, Melchior FRANZ wrote:
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
Hm, but the backlight control is done via the standard ACPI, no? If so, the fact that acer_wmi doesn't work sounds irrelevant.
BTW, did you try my previous patch?
Takashi
Yes, please try Takashi's previous patch.
I am tracing bko#34142, but this issue does not related to your backlight control, because there have _BCM, _BQC declare in your DSDT, your machine MUST SUPPORTED by standard acpi backlight interface.
Even the acer-wmi can probed on your machine, it cann't help anything for your backlight control.
Thank's a lot! Joey Lee