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            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - [7 Series] [Backlight] Incorrectly driver set backlight"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=63931#c11">Comment # 11</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED --- - [7 Series] [Backlight] Incorrectly driver set backlight"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=63931">bug 63931</a>
              from <span class="vcard"><a class="email" href="mailto:i.gnatenko.brain@gmail.com" title="Igor <i.gnatenko.brain@gmail.com>"> <span class="fn">Igor</span></a>
</span></b>
        <pre>Created <span class=""><a href="attachment.cgi?id=78560" name="attach_78560" title="Logfile from test xrandr">attachment 78560</a> <a href="attachment.cgi?id=78560&action=edit" title="Logfile from test xrandr">[details]</a></span>
Logfile from test xrandr

I wrote little script for test xrandr.
#!/bin/bash
LOGFILE=test_xrandr.log
echo -n > $LOGFILE
for b in {1..100}
do
  xrandr --output LVDS1 --set Backlight $b
  echo "Test $b value:" >> $LOGFILE
  xrandr --verbose | grep -i backlight  >> $LOGFILE
done</pre>
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