於 四，2012-03-22 於 08:03 +0530，Pradeep Subrahmanion �到：

On Thu, 2012-03-22 at 09:33 +0800, joeyli wrote:

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於 四，2012-03-22 於 00:39 +0530，Pradeep Subrahmanion �到：

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This new patch should remove acpi_video0 interface on your machine.
Please kindly provide your dmidecode:
 dmidecode > dmidecode.log

And, 
please make should the patch really applied, you can do a bit change on
pr_info message by yourself.

   Sorry . I think there was some mistake . I tried the patch again. Now
I see only intel_backlight inside /sys/class/backlight. There is no
acer-wmi interface . Is this the expected behavior ? . Or am I missing
anything ?

Yes, this is the expected behavior! But, now I doubt your issue was
workaround by acpi_osi=Linux but not intel_backlight.

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echo 5 > /sys/class/backlight/acpi_video0/brightness 
echo 5 > /sys/class/backlight/intel_backlight/brightness

But it doesn't make any change . 

In my case  , 'acpi_backlight = vendor' does not make any difference since the hot key control 

already starts working with 'acpi_osi=Linux' option.

cat /proc/cmdline gives , 

BOOT_IMAGE=/boot/vmlinuz-3.3.0+
root=UUIDğ197a59-c067-4fd8-ad90-c4d721816077 ro acpi_osi=Linux 


Thanks , 

Pradeep Subrahmanion

OK, that's more clearly, please remove acpi_osi=Linux then re-test, I
think the hotkey of backlight control only works with acpi_osi=Linux ?

Does your backlight control still work if you remove acpi_osi=Linux ?

   If I remove acpi_osi=Linux , the hot key control stops working .

What is the preload OS in your machine when you bought it? Windows XP,
Vista or Windows 7?


thanks
Joey Lee

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