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

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

The following reply was made to PR kern/49398; it has been noted by GNATS.

From: Taylor R Campbell <riastradh%NetBSD.org@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: gnats-admin%netbsd.org@localhost, netbsd-bugs%netbsd.org@localhost, jdbaker%mylinuxisp.com@localhost
Subject: Re: kern/49398 (i386-current GENERIC (i915drmkms) boot hangs if monitor powered off)
Date: Wed, 21 Oct 2015 13:59:15 +0000

    Date: Tue, 20 Oct 2015 23:17:30 -0500 (CDT)
    From: "John D. Baker" <jdbaker%mylinuxisp.com@localhost>
 
    Confirmed.
 
      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.