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<body><span class="vcard"><a class="email" href="mailto:qingshuai.tian@intel.com" title="Qingshuai Tian <qingshuai.tian@intel.com>"> <span class="fn">Qingshuai Tian</span></a>
</span> changed
<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB dp dongle] Apple miniDP-to-VGA fails link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69128">bug 69128</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>NEEDINFO
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<td>NEW
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB dp dongle] Apple miniDP-to-VGA fails link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69128#c15">Comment # 15</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [IVB dp dongle] Apple miniDP-to-VGA fails link training"
href="https://bugs.freedesktop.org/show_bug.cgi?id=69128">bug 69128</a>
from <span class="vcard"><a class="email" href="mailto:qingshuai.tian@intel.com" title="Qingshuai Tian <qingshuai.tian@intel.com>"> <span class="fn">Qingshuai Tian</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=69128#c14">comment #14</a>)
<span class="quote">> As for the EDID issue: despite the error message the modeset seems to
> succeed using a default mode; is the display on or blank for you?</span >
The display is on. It work normally even when boot up with the error message.
<span class="quote">> Could you check if your VGA cable is DDC-2 compatible? There are cables out
> there without pin 9,12,15 properly wired and with those you won't be able to
> read the EDID. You can check this by using the cable on another machine and
> checking with xrandr if all the modes supported by the display are listed.</span >
I plugged the cable on another machine and get the information with xrandr:
VGA1 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 509mm
x 286mm
1920x1080 60.0*+
1680x1050 60.0
1280x1024 75.0 60.0
1440x900 75.0 59.9
1280x960 60.0
1152x864 75.0
1280x720 60.0
1024x768 75.1 70.1 60.0
832x624 74.6
800x600 72.2 75.0 60.3 56.2
640x480 75.0 72.8 66.7 60.0
720x400 70.1
But sorry that I'm not sure how to confirm whether all the modes of the display
are listed or not. I hope to hear from you. Thanks :)</pre>
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