port-amd64/57747: console far too small with i915 in NetBSD 10

[jeandre%NetBSD.org@localhost]

>Number:         57747
>Category:       port-amd64
>Synopsis:       console far too small with i915 in NetBSD 10
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    port-amd64-maintainer
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sun Dec 03 23:45:00 +0000 2023
>Originator:     Jeandre Kruger
>Release:        NetBSD 10.99.10
>Organization:
>Environment:
System: NetBSD 10.99.10 NetBSD 10.99.10 (GENERIC) #0: Sun Dec 3 02:50:09 UTC 2023 mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:
	When using NetBSD-current or 10.0 RC1 on an amd64 netbook I have, the
	console is far too small -- less than 80 columns.  (Thus the installer
	refuses to run, but it affects the system after installation too.)

	This differs from NetBSD/i386 or NetBSD 9.3 on the same netbook (only
	affecting NetBSD/amd64), where there is no problem and the console is
	much more reasonably sized.  Disabling i915drmkms works around it.  A
	different i386 netbook with i915 also doesn't have this problem.  I
	don't know if there's a way to change from this default size, except by
	disabling i915drmkms, in which case wsconscfg/wscons.conf let you
	choose between 80x25 and 80x50.

	From the dmesg:

	[     1.038193] agp0 at pchb0: Pineview chipset
	[     1.038193] agp0: detected 7164k stolen memory
	[     1.038193] agp0: aperture at 0x40000000, size 0x10000000
	[     1.038193] i915drmkms0 at pci0 dev 2 function 0: Intel Pineview Integrated Graphics Device (rev. 0x02)
	[     1.038193] Intel Pineview Integrated Graphics Device (miscellaneous display, revision 0x02) at pci0 dev 2 function 1 not configured
	...
	[     3.197030] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
	[     3.197030] [drm] Driver supports precise vblank timestamp query.
	[     3.197030] i915drmkms0: interrupting at ioapic0 pin 16 (i915drmkms0)
	[     3.237021] [drm] Initialized overlay support.
	[     3.237021] [drm] Initialized i915 1.6.0 20200114 for i915drmkms0 on minor 0
	[     3.257024] intelfb0 at i915drmkms0
	[     3.257024] [drm] DRM_I915_DEBUG enabled
	[     3.257024] [drm] DRM_I915_DEBUG_GEM enabled
	[     3.257024] intelfb0: framebuffer at 0x40009000, size 1024x600, depth 32, stride 4096
	[     4.137021] wsdisplay0 at intelfb0 kbdmux 1: console (default, vt100 emulation), using wskbd0
	[     4.187021] wsmux1: connecting to wsdisplay0
	[     9.197021] wsdisplay0: screen 1 added (default, vt100 emulation)
	[     9.207023] wsdisplay0: screen 2 added (default, vt100 emulation)
	[     9.207023] wsdisplay0: screen 3 added (default, vt100 emulation)
	[     9.217022] wsdisplay0: screen 4 added (default, vt100 emulation)
>How-To-Repeat:
	Boot NetBSD 10.0 RC1 or NetBSD-current on affected netbook.
>Fix:
	Can be worked around by disabling i915drmkms, or using NetBSD/i386, or
	using xterm instead.