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            <b><a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Black X laptop screen with cursor if HDMI not plugged in, bisected"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=108577#c27">Comment # 27</a>
              on <a class="bz_bug_link 
          bz_status_NEW "
   title="NEW - Black X laptop screen with cursor if HDMI not plugged in, bisected"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=108577">bug 108577</a>
              from <span class="vcard"><a class="email" href="mailto:duncan_roe@optusnet.com.au" title="Duncan Roe <duncan_roe@optusnet.com.au>"> <span class="fn">Duncan Roe</span></a>
</span></b>
        <pre>(In reply to Alex Deucher from <a href="show_bug.cgi?id=108577#c24">comment #24</a>)
<span class="quote">> Does just removing this line from the code:
> value |= 0x84;
> also fix the issue?</span >

No, I get the black screen again. To be clear, I applied the patch in 
<span class=""><a href="attachment.cgi?id=142382" name="attach_142382" title="One-line patch as Alex requested">Attachment 142382</a> <a href="attachment.cgi?id=142382&action=edit" title="One-line patch as Alex requested">[details]</a></span> to Linux 4.19 stable commit
84df9525b0c27f3ebc2ebb1864fa62a97fdedb7d</pre>
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