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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 15:37:17
Message-ID: 53C69C2D.3030907 () suddenlinkmail ! com
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On 07/16/2014 04:15 AM, auxsvr@gmail.com wrote:
> On Wednesday 16 of July 2014 04:03:58 David C. Rankin wrote:
>>> 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 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.
>
> On my computer, the brightness keys do not work outside X. In your case, both
> the kernel interface to set the brightness and the keys work, therefore it is
> the job of the desktop environment to change the brightness on key press,
> unless you configure some daemon to do so independently.
>

I think the problem is 13.1 does not have:

xorg-x11-driver-video-radeonhd-1.3.0_20100512_80ba041-44.2.x86_64

There is no radeonhd driver to be found in the standard repos? In 11.4 the 
following were installed:

xorg-x11-driver-input-7.6-144.1.x86_64
xorg-x11-driver-video-7.6-262.1.x86_64
xorg-x11-driver-video-intel-legacy-2.9.1-32.1.x86_64
xorg-x11-driver-video-nouveau-0.0.16_20110720_b806e3f-31.2.x86_64
xorg-x11-driver-video-radeonhd-1.3.0_20100512_80ba041-44.2.x86_64

The Archlinux wiki seems to have sorted out several approaches:

https://wiki.archlinux.org/index.php/Backlight

Since acpi works fine on my box, it looks like I can specify a custom Devices 
section in 50-device.conf to try and address the problem.

Why is there no radeonhd driver for 13.1?


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