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List:       opensuse
Subject:    Re: [opensuse] 13.1 - screen brightness stuck on high - unresponsive to fn keys - how to fix?
From:       "David C. Rankin" <drankinatty () suddenlinkmail ! com>
Date:       2014-07-16 9:03:58
Message-ID: 53C63FFE.9090102 () suddenlinkmail ! com
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On 07/16/2014 03:49 AM, David C. Rankin wrote:
> On 07/15/2014 05:28 AM, auxsvr@gmail.com wrote:
>> On Monday 14 of July 2014 20:52:39 David C. Rankin wrote:
>>> Testing acpi_listen:
>>>
>>>     $ acpi_listen
>>> video/brightnessdown BRTDN 00000087 00000000 K
>>> video/brightnessdown BRTDN 00000087 00000000 K
>>> video/brightnessdown BRTDN 00000087 00000000 K
>>> video/brightnessup BRTUP 00000086 00000000 K
>>> video/brightnessup BRTUP 00000086 00000000 K
>>> video/brightnessup BRTUP 00000086 00000000 K
>>> video/brightnessup BRTUP 00000086 00000000 K
>>> ^\Quit
>>>
>>>     Hmm. So the keystrokes are seen with acpid running, but it has no effect
>>> on the brightness. So it looks like we need to create hooks or a config for
>>> the events. But where? /etc/acpi/events?
>>
>> It depends on the desktop environment. On KDE 4.13.2, System
>> Settings/Shortcuts and Gestures/Global Keyboard Shortcuts/KDE Daemon/Decrease
>> or Increase Screen Brightness allows you to set the keys.
>>
>
> Guys,
>
>    The problem here seems to be 13.1 itself. I ran acpi to get a status:
>
> # acpi -V
> Battery 0: Unknown, 100%
> Battery 0: design capacity 4000 mAh, last full capacity 4000 mAh = 100%
> Adapter 0: on-line
> Cooling 0: LCD 0 of 7
> ^^^^^^^^^^^^^^^^^^^^^^
> Cooling 1: Processor 0 of 3
> Cooling 2: Processor 0 of 10
>
> (which knocked network manager offline and my wireless??)
>
> Here is the issue:
>
> Cooling 0: LCD 0 of 7
>
> WTF?? Cooling? then LCD 0 of 7??
>
> It looks like the LCD brightness function is FUBAR in 13.1 for my Toshiba.
> Cooling??
>
> I don't even know what to make of this?
>

I also think 13.1 is looking at the wrong brightness. The *current brightness* 
is 7, not zero. Recall, I show 2 brightness interfaces under /sys/class/backlight:

   # cat /sys/class/backlight/acpi_video0/brightness
7
   # cat /sys/class/backlight/radeon_bl0/brightness
0

So it looks like acpi reports the wrong one, and who knows what it is attempting 
to set. The values never change in either when I use the function keys.



-- 
David C. Rankin, J.D.,P.E.
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