amd64/158874: I cannot change tty screen with vidcontrol (Blackscreen)

[Alvaro]

>Number:         158874
>Category:       amd64
>Synopsis:       I cannot change tty screen with vidcontrol (Blackscreen)
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jul 13 17:00:26 UTC 2011
>Closed-Date:
>Last-Modified:
>Originator:     Alvaro
>Release:        I'm using 9.0-CURRENT
>Organization:
none
>Environment:
FreeBSD shuttle0.lan 9.0-CURRENT FreeBSD 9.0-CURRENT #1: Wed Jul 13 07:03:25 WEST 2011     netSys at shuttle0.lan:/usr/obj/usr/src/sys/HUBBLE  amd64
>Description:
I cannot change tty screen with vidcontrol (Blackscreen and I need restart when passes 1-2min if not change the tty)
This problem affect on 8.0 to 8.2 and 9.0-CURRENT (7.x I did not try)
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I have these lines on my kernel for uses VESA for changes tty resolution with vidcontrol (Included agp, vga lines..et). After it, I need change fast another tty because if not I cannot use system.

options VESA
options SC_PIXEL_MODE
options VESA_DEBUG

I have got, BenQ monitor of 1366x768 screen resolution and NVIDIA 8200/n730

The last summer, I can change the tty resolution to MODE_279 (1024x768) and I used it. But the code was seems changed and cannot work it.

>How-To-Repeat:
> vidcontrol MODE_279
VESA: set_mode(): 24(18) -> 279(117)
VESA: about to set a VESA mode...
VESA: mode set!
vesa_set_mode(): vi_width:1024, line_width:2048
VESA: set_mode(): 279(117) -> 24(18)
>Fix:


>Release-Note:
>Audit-Trail:
>Unformatted: