[Bug 56359] [GM965/GL960] external monitor flickering with red stripes

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=56359

Jani Nikula <jani.nikula at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |NEEDINFO
                 CC|                            |jani.nikula at intel.com

--- Comment #5 from Jani Nikula <jani.nikula at intel.com> ---
(In reply to comment #4)
> There are some not so good lines in dmesg
> [   19.728105] [drm:intel_panel_setup_backlight] *ERROR* Failed to get
> maximum backlight value

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.

> [   20.484043] i915: fixme: max PWM is zero

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.

-- 
You are receiving this mail because:
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20130109/6c19ebeb/attachment-0001.html>