Subject: kern/8628: switching wscons screens occasionally updates display incorrectly
To: None <>
From: None <>
List: netbsd-bugs
Date: 10/15/1999 23:28:33
>Number:         8628
>Category:       kern
>Synopsis:       switching wscons screens can corrupt display
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    kern-bug-people (Kernel Bug People)
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Oct 15 23:27:01 1999
>Originator:     Rafal Boni
>Release:        -current from 10/10 or so
System: NetBSD 1.4L NetBSD 1.4L (DOPPELGANGER) #1: Tue Oct 12 18:44:19 EDT 1999 i386
	problem happens on my laptop with Neomagic MagicGraph 128XD

	I'm running the following:
		screen 0: tail -f cvs-update-log (which was empty and not
		screen 1: tcpdump -i ne0
		screen 2: vmstat 5

	At some point, I switched from screen 1 to screen 2 and noticed
	that the *middle* of the screen contained data from screen 1.
	Switched to screen 3 (empty screen with login prompt) and back,
	but the "droppings" from screen 1 were still present on screen 2.

	Screen 1 seemed to contain the right data.

	It looks like screen 1 was in the middle of a scrolling action
	when I switched screens.

	See above..
	None available.