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<body><span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [GM965/GL960] external monitor flickering with red stripes"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56359">bug 56359</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">Status</td>
<td>NEW
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<td>NEEDINFO
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<td style="text-align:right;">CC</td>
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<td>jani.nikula@intel.com
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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [GM965/GL960] external monitor flickering with red stripes"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56359#c5">Comment # 5</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO --- - [GM965/GL960] external monitor flickering with red stripes"
href="https://bugs.freedesktop.org/show_bug.cgi?id=56359">bug 56359</a>
from <span class="vcard"><a class="email" href="mailto:jani.nikula@intel.com" title="Jani Nikula <jani.nikula@intel.com>"> <span class="fn">Jani Nikula</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=56359#c4">comment #4</a>)
<span class="quote">> There are some not so good lines in dmesg
> [ 19.728105] [drm:intel_panel_setup_backlight] *ERROR* Failed to get
> maximum backlight value</span >
I wonder what kernel you're really running. That message has been demoted to
debug level since v3.7. Please try with a "real" v3.7 or v3.8-rc2 or later, and
if you can, reproduce the original problem with the drm.debug=0xe module
parameter, and attach the dmesg.
<span class="quote">> [ 20.484043] i915: fixme: max PWM is zero</span >
I realize that we don't properly handle this case. We no longer create a
userspace backlight interface in this case, but we still try to handle ACPI
backlight methods, which is bound to be buggy.
However, the two messages you see above are not related to any of the reported
external monitor issues at all. If you have any LVDS backlight issues, that's
another story - and another bug should be filed for that.
Please check the reported problem with a new kernel.</pre>
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