From: Keith Packard <keithp@keithp.com>
To: Marcos Paulo de Souza <marcos.mage@gmail.com>,
linux-kernel@vger.kernel.org
Cc: airlied@linux.ie, dri-devel@lists.freedesktop.org
Subject: Re: max PWM is zero
Date: Sat, 19 Nov 2011 10:50:39 -0800 [thread overview]
Message-ID: <864ny0kku8.fsf@sumi.keithp.com> (raw)
In-Reply-To: <alpine.LNX.2.00.1111191124350.5248@darkstar.example.net>
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On Sat, 19 Nov 2011 11:26:07 +0000 (Local time zone must be set--see zic manual page), Marcos Paulo de Souza <marcos.mage@gmail.com> wrote:
> So, anybody gets the same message?
>
> I'm trying the 3.2-rc2 and it gives the same message.
>
> Again, if you need someone to make tests, or test some patches, I'm
> able to do this.
Is your machine even using the intel backlight device? You can test this
by:
# cd /sys/class/backlight/intel_backlight
Then look at 'max_brightness' and try echoing a range of numbers from 0
to max_brightness into the brightness file and see if it changes the
backlight.
It's more than possible that your machine is simply using some other
hardware to drive the backlight and that the integrated backlight
controller is simply disabled.
--
keith.packard@intel.com
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next prev parent reply other threads:[~2011-11-19 18:50 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-15 15:14 max PWM is zero Marcos Paulo de Souza
[not found] ` <alpine.LNX.2.00.1111191124350.5248@darkstar.example.net>
2011-11-19 18:50 ` Keith Packard [this message]
[not found] ` <alpine.LNX.2.00.1111212248140.2070@darkstar.example.net>
2011-11-22 1:40 ` Keith Packard
2011-11-22 2:38 ` Lucas De Marchi
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