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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BDW-Y] DP display unable to light up boot with DP+eDP [DP not detected]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85048#c10">Comment # 10</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [BDW-Y] DP display unable to light up boot with DP+eDP [DP not detected]"
href="https://bugs.freedesktop.org/show_bug.cgi?id=85048">bug 85048</a>
from <span class="vcard"><a class="email" href="mailto:xunx.fang@intel.com" title="fangxun <xunx.fang@intel.com>"> <span class="fn">fangxun</span></a>
</span></b>
<pre>(In reply to Paulo Zanoni from <a href="show_bug.cgi?id=85048#c8">comment #8</a>)
<span class="quote">> Please boot the machine, reproduce the bug, and then run the following
> command, inside the intel-gpu-tools/tools directory:</span >
sudo ./intel_reg_read
<span class="quote">> -d 0xC6204 0x130040 0x46200 0xC4030 0xC4000</span >
Then please paste the output
<span class="quote">> here.</span >
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6
5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 1 0 0 0
0x130040 : 0x44000000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6
5 4 3 2 1 0
0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0
0x46200 : 0x21B
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6
5 4 3 2 1 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0
0 1 1 0 1 1
0xC4030 : 0x10101010
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6
5 4 3 2 1 0
0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0
0 1 0 0 0 0
0xC4000 : 0x800000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6
5 4 3 2 1 0
0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0</pre>
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