Re: kern/56608: i915drmkms0: info: [drm] Cannot find any crtc or sizes

["John D. Baker" <jdbaker%consolidated.net@localhost>]

The following reply was made to PR kern/56608; it has been noted by GNATS.

From: "John D. Baker" <jdbaker%consolidated.net@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/56608: i915drmkms0: info: [drm] Cannot find any crtc or
 sizes
Date: Thu, 26 May 2022 10:00:09 -0500 (CDT)

 On Thu, 26 May 2022, John D. Baker wrote:
 
 > Will test other intel-graphics systems when I am able.
 
 A system with an i82946 chip set and integrated graphics works.
 (The font chosen for the console is ridiculously large, resulting
 in a 64x24 display and attempts to change it fail, but that's not
 related to the issue in this PR.)
 
 > Would be nice if the Q45-based system will be able to boot with the
 > display turned off.
 
 The machine still hangs if the display (attached via DisplayPort) is
 turned off.  The only way out is to power-cycle the machine.  I'll see
 if I can arrange for serial console, but I suspect it will be inconclusive
 as historically, i915drmkms doesn't initialize at all if the console is
 on the serial port, even if wscons and related ttyEn are enabled.
 
 The machine also has VGA, so maybe it changes behavior if the displayport
 display were not connected at all and/or the VGA port is used and the
 display is turned off?
 
 I'll see about checking other intel-graphics machines that don't have
 DisplayPort to see how they behave with no monitor connected or monitor
 connected but turned off.
 
 -- 
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