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Date: Tue, 2 Jan 1996 14:12:46 +0100
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Subject: kern/927: VGA mode not restored
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>Number:         927
>Category:       kern
>Synopsis:       VGA mode not restored
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Jan  2 04:30:01 PST 1996
>Last-Modified:
>Originator:     Grzegorz J. Blinowski
>Organization:
Warsaw University of Technology
>Release:        FreeBSD 2.1-STABLE i386
>Environment:

	FreeBSD 2.1-RELEASE syscons (sc0) VGA driver
	Trident 8900 1MB RAM
	Mono SVGA monitor

>Description:

	With the hw. configuration as above (color VGA adaptor, mono
	monitor) syscons driver does not always restore text mode correctly.
	Bad console switching results in a blank screen, I didn't find
	a way of restoring screen mode after this happens (must
	reboot). 

>How-To-Repeat:

	vidcontrol VGA_90x25

	Run XFree86 3.12,
	than try to switch consoles with ctrl-alt-Fn or
	exit XFree.
>Fix:
	
	The bug is in the syscons (/sys/i386/isa/syscons*)  driver, 
	probably in the ioctl responsible for text/graphics mode switching.
>Audit-Trail:
>Unformatted: