ports/85470: 82845GV video mode switching with Xorg

[Sebastien B]

>Number:         85470
>Category:       ports
>Synopsis:       82845GV video mode switching with Xorg
>Confidential:   no
>Severity:       serious
>Priority:       high
>Responsible:    freebsd-ports-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Tue Aug 30 09:50:22 GMT 2005
>Closed-Date:
>Last-Modified:
>Originator:     Sebastien B
>Release:        5.4
>Organization:
>Environment:
FreeBSD oasis 5.4-RELEASE FreeBSD 5.4-RELEASE #0: Sat Aug  6 16:49:34 CEST 2005     root at oasis:/usr/src/sys/i386/compile/MYKERNEL  i386
(the problem's the same with the default 5.4 kernel from the ISO, and with 5.3)
>Description:
When Xorg is run on my laptop, the screen goes dark for a long time. Sometimes, initialization succeeds and I have the classical pattern on the screen - but then, the server is very unstable and prone to segfaults ; sometimes it just freezes or segfaults. Switching consoles also takes a long time (~ 10s) with the screen going dark.
Strangely, the server output, even in verbose mode, doesn't show any error message.
I don't have this problem with XFree86.
>How-To-Repeat:
Install and run Xorg from FreeBSD 5.3 or 5.4 ISOs on a machine with a 82845GV integrated video chipset.
>Fix:

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