i386/82548: VBE video driver incorrectly switches to/from text mode on i845

[Igor]

>Number:         82548
>Category:       i386
>Synopsis:       VBE video driver incorrectly switches to/from text mode on i845
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-i386
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Wed Jun 22 19:10:09 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Igor
>Release:        4.11
>Organization:
>Environment:
FreeBSD control.fryazino.net 4.11-RELEASE FreeBSD 4.11-RELEASE #1: Fri Apr 29 07:52:48 MSD 2005     root at control.fryazin
o.net:/usr/obj/usr/src/sys/MY  i386
>Description:
When I choose "VESA" driver in X11 server configuration, it works fine unless I switch to text mode and then again to graphics (e.g. switch to console 1 then back to console 9 or end X session then start another X session). After that the screen is blank (in graphics mode, on text consoles 1 or 2 all is fine)
I suppose there is a bug either in "VESA" video driver code or in VBE code for Intel i845G. If second is the case there is nothing to be done.
>How-To-Repeat:
1. find a computer with integrated Intel 845 G Graphics
2. setup XFree to use VESA driver
3. start X session
4. switch to text console (Ctrl+Alt+F2)
5. switch back (Alt+F9)

>Fix:
use "i810" video driver :)
And document somewhere that is handles not just i810 but also i845, i855,ixx....
>Release-Note:
>Audit-Trail:
>Unformatted: