svn commit: r305507 - head/sys/sparc64/conf

Marius Strobl marius at FreeBSD.org
Tue Sep 6 22:18:10 UTC 2016


Author: marius
Date: Tue Sep  6 22:18:08 2016
New Revision: 305507
URL: https://svnweb.freebsd.org/changeset/base/305507

Log:
  Disable vt(4) by default on sparc64 as creator_vt(4) and vt_ofwfb(4)
  have the serious problem of not actually attaching the hardware they
  are driving at the bus level. This causes creator(4) and machfb(4)
  to attach and drive the very same hardware in parallel when both
  syscons(4) and vt(4) as well as their associated hardware drivers
  are built into a kernel, i. e. GENERIC, at the same time.
  Also, syscons(4) and its drivers still are way superior to vt(4) and
  its equivalents; unlike the syscons(4) counterparts the vt(4) drivers
  don't provide hardware acceleration resulting in considerably slower
  screen drawing, creator_vt(4) doesn't provide a /dev/fb node as
  required by the Xorg sunffb(4) etc. In theory, vt_ofwfb(4) should be
  able to handle more devices than machfb(4). However, testing shows
  that it hardly works with any hardware machfb(4) isn't also able to
  drive, making vt(4) and vt_ofwfb(4) not favorable for the time being
  from that perspective either.
  
  MFC after:	3 days

Modified:
  head/sys/sparc64/conf/GENERIC

Modified: head/sys/sparc64/conf/GENERIC
==============================================================================
--- head/sys/sparc64/conf/GENERIC	Tue Sep  6 22:03:53 2016	(r305506)
+++ head/sys/sparc64/conf/GENERIC	Tue Sep  6 22:18:08 2016	(r305507)
@@ -147,7 +147,7 @@ device		splash		# Splash screen and scre
 options 	KBD_INSTALL_CDEV # install a CDEV entry in /dev
 
 # vt is the new video console driver
-device		vt
+#device		vt
 
 # Builtin hardware
 device		auxio		# auxiliary I/O device


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