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install/51374: sysinstall leaves serial console in non-scrolling state

>Number:         51374
>Category:       install
>Synopsis:       sysinstall leaves serial console in non-scrolling state
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    install-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Fri Jul 29 09:25:00 +0000 2016
>Originator:     Paul Goyette
>Release:        NetBSD 7.99.33
| Paul Goyette     | PGP Key fingerprint:     | E-mail addresses:      |
| (Retired)        | FA29 0E3B 35AF E8AE 6651 | paul at   |
| Kernel Developer | 0786 F758 55DE 53BA 7731 | pgoyette at |
System: NetBSD 7.99.33 NetBSD 7.99.33 (POKEY 2016-07-04 08:34:20) #0: Mon Jul 4 20:24:24 PHT 2016 amd64
Architecture: x86_64
Machine: amd64
	When sysinstall starts up, it appears to establish a "scroll
	region" on lines 1 through 24.  If you're running sysinstall
	within a qemu emulator session, and your terminal session is
	"tall" (ie, has more than 24 lines;  mine has 36), then when
	sysinstall exits, it leaves the scroll region intact.  And
	the cursor will eventually move beyond the end of the scroll
	region.  When it reaches the last line on the host's window,
	it won't scroll, and from that point on everything happens on
	the bottom line (until you reset the session).
	See above.
	Sysinstall should remove the scroll region whenever it is going
	to exit from its "heavily controlled display" mode.  Thus it
	should do so at exit (before shutting down the newly-installed
	system) as well as any time the user requests "exit to shell".


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