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    <body><span class="vcard"><a class="email" href="mailto:jirislaby@gmail.com" title="Jiri Slaby <jirislaby@gmail.com>"> <span class="fn">Jiri Slaby</span></a>
</span> changed
          <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - [skl] assertion hits"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111197">bug 111197</a>
          <br>
             <table border="1" cellspacing="0" cellpadding="8">
          <tr>
            <th>What</th>
            <th>Removed</th>
            <th>Added</th>
          </tr>

         <tr>
           <td style="text-align:right;">Resolution</td>
           <td>FIXED
           </td>
           <td>---
           </td>
         </tr>

         <tr>
           <td style="text-align:right;">Status</td>
           <td>RESOLVED
           </td>
           <td>REOPENED
           </td>
         </tr></table>
      <p>
        <div>
            <b><a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - [skl] assertion hits"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111197#c19">Comment # 19</a>
              on <a class="bz_bug_link 
          bz_status_REOPENED "
   title="REOPENED - [skl] assertion hits"
   href="https://bugs.freedesktop.org/show_bug.cgi?id=111197">bug 111197</a>
              from <span class="vcard"><a class="email" href="mailto:jirislaby@gmail.com" title="Jiri Slaby <jirislaby@gmail.com>"> <span class="fn">Jiri Slaby</span></a>
</span></b>
        <pre>(In reply to Chris Wilson from <a href="show_bug.cgi?id=111197#c1">comment #1</a>)
<span class="quote">> assert(!get_private(back)->bo->active_scanout);</span >

I have just hit it even after the move: 
#5  0x00007f00322cb166 in sna_dri2_schedule_swap (client=0x55f38c48fa50,
draw=0x55f38cc13f70, front=0x55f38c82d200, back=0x55f38ccc6fa0,
target_msc=0x7ffd7ecee278, divisor=0, remainder=0, func=0x55f38ba5b7c0
<DRI2SwapEvent>, data=0x55f38cc13f70) at sna_dri2.c:3339
#6  0x000055f38ba5a90d in DRI2SwapBuffers (client=client@entry=0x55f38c48fa50,
pDraw=0x55f38cc13f70, target_msc=<optimized out>, divisor=0, remainder=0,
swap_target=swap_target@entry=0x7ffd7ecee318, func=0x55f38ba5b7c0
<DRI2SwapEvent>, data=0x55f38cc13f70) at dri2.c:1182
#7  0x000055f38ba5bd5a in ProcDRI2SwapBuffers (client=0x55f38c48fa50) at
dri2ext.c:424
#8  ProcDRI2Dispatch (client=0x55f38c48fa50) at dri2ext.c:621
#9  0x000055f38b9344b4 in Dispatch () at dispatch.c:478

It took a day to hit it -- in the meantime, I disabled full debug, so no more
info I have. It happened during switch of virtual desktops.</pre>
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