kern/48618: Internal screen-saver is unable to restore the screen properly

[zbigniew2011%mail.com@localhost]

>Number:         48618
>Category:       kern
>Synopsis:       Internal screen-saver is unable to restore the screen properly
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Tue Feb 25 22:35:00 +0000 2014
>Originator:     Zbigniew
>Release:        6.1.3
>Organization:
>Environment:
NetBSD Trurl 6.1.3 NetBSD 6.1.3 (MYKERNEL) #0: Sat Feb  8 16:18:14 CET 2014  
root@Trurl:/usr/src/sys/arch/i386/compile/MYKERNEL i386
>Description:
When the machine is left idle for about 2-3 hours, the screen gets blank - I 
understand, that some kind of screen-saver has been activated - but there's no 
way to get the screen contents back; it remains blank, and pressing keys won't 
help. Fortunately, the system can be shut down - for example, by power button - 
but it takes a system reload to allow normal work again.
I'm using old BX-based motherboard with Radeon 9200 AGP graphics adaptor.
>How-To-Repeat:
1. Boot the system.
2. Leave the machine idle until the screen gets blank.
3. Try pressing any key; it won't help.
>Fix: