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<pre wrap="">Alex Deucher wrote:
</pre>
<blockquote>
<pre wrap="">In most cases the driver is able to resume fine and bring back the
backlight. In your case it doesn't seem to be working. You might try
a newer kernel. I fixed some backlight issues in either 3.6 or 3.7
IIRC.
</pre>
</blockquote>
I really do not believe that this is a problem with the driver or
the kernel. The light turns on correctly when I reboot the system.
It is only when I close and then open the lid of the laptop that the
light does not come on. That exact same behavior is displayed when
the system is configured to use the fglrx driver but the aticonfig
--initial script has not been run. Clearly the aticonfig --initial
script does not change the kernel or the driver, it just alters some
scripts. So logically the problem is that some command is not
being issued as a result of the lid being opened when I configure
the Xorg driver. I need to run the Xorg driver equivalent of the
aticonfig script, but I do not know what it is! If I ask Ubuntu
12.10 to activate the Xorg driver there is no aticonfig script to
run.<br>
<blockquote>
<blockquote type="cite" style="color: #000000;">
<pre wrap="">I do not know what I am doing, so just tell me what to try.
</pre>
</blockquote>
<pre wrap="">As I said, normally, it should just work. You can try adjusting the
backlight manually with sysfs.
To check the max brightness:
cat <i class="moz-txt-slash"><span class="moz-txt-tag">/</span>sys/class/backlight<span class="moz-txt-tag">/</span></i>[driver]/max_brightness
To set a brightness level:
echo [brightness] | sudo tee - <i class="moz-txt-slash"><span class="moz-txt-tag">/</span>sys/class/backlight<span class="moz-txt-tag">/</span></i>[driver]/brightness
a
replace [brightness] with whatever level you want to set and replace
[driver] with the name of the backlight device on your system. You
may have more than one so try all of them. E.g.,
<i class="moz-txt-slash"><span class="moz-txt-tag">/</span>sys/class/backlight/radeon<span class="moz-txt-tag">/</span></i>, etc.
</pre>
</blockquote>
/sys/class/backlight/ only contains one sub-directory acpi_video0,
in which the brightness and max_brightness files both contain 15. I
do no believe that the problem is with the brightness of the display
the problem is that the light is OFF! Admittedly at this moment I
am running with the fglrx driver because whatever the aticonfig
--initial command sets up correctly instructs that driver to turn
the light on, so I do not know for a fact what is in
/sys/class/backlight when the Xorg driver is installed.<br>
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