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Re: kern/49398 (i386-current GENERIC (i915drmkms) boot hangs if monitor powered off)

   Date: Tue, 20 Oct 2015 23:17:30 -0500 (CDT)
   From: "John D. Baker" <>


     dsl=0x5a vsample=0x1e4

   machine is hung spining on this condition forever.

   So, what sets up this condition when booting with no monitor attached
   (or a CRT attached that is powered off)?

   The i82845 machine hangs forever in this case.  The i82915 machine
   boots, but reconnecting a monitor does not display anything.  The
   E7221 machine assumes a default 1024x768 mode with no monitor attached.

   Suggestions on where to poke next?

Thanks for the detailed analysis!  I will take a closer look when I
have a moment, perhaps tonight.

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