#4355 HIGH Never A: laptop becomes horribly slow, gets black square, Terminal goes nuts

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#4355: laptop becomes horribly slow, gets black square, Terminal goes nuts
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  Reporter:  AlbertCahalan  |       Owner:  jg            
      Type:  defect         |      Status:  new           
  Priority:  high           |   Milestone:  Never Assigned
 Component:  distro         |     Version:                
Resolution:                 |    Keywords:                
  Verified:  0              |  
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Comment(by AlbertCahalan):

 I just got a scrambled display while at the Linux console. Lots of
 characters went missing. It could be like bug #2305.

 I was running slabtop when it happened, but I'd looked away from the
 screen. There was a screen refresh before I could really look for a
 pattern; the refresh made the problem go away. At about that time I got
 another message about curdma being less than bufaddr.

 IMHO this is looking like wild DMA. Maybe it should be a blocker. Wild DMA
 is very very bad.

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Ticket URL: <https://dev.laptop.org/ticket/4355#comment:4>
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