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Re: Xfree86 and screen problems with LCD and neomagic 256

On Fri, 8 Mar 2002, Dumas Patrice wrote:

>I have a laptop, with a neomagic 256 and an LCD display, redhat 7.2 with
>After some time, X freeze, and the keyboard is also dead. However linux is
>still up, and it is possible to login remotely, for example with ssh, and kill
>any process, and reboot or halt. When I reboot, as soon as the computer goes in
>graphical mode, the same thing happen, this time with a black screen (keyboard
>does not respond). I can still log in remotely. If I halt, then everything is
>This problem doesn't show up under windows, but I still suspect a hardware 
>problem. Is it possible to check hardware integrity with XFree86 ? Or have
>generate logs which give some insights in the problem ? 
>Here is the command used to launch X:
>/usr/bin/X11/X -nolisten tcp -logverbose 10
>I attach the XF86config-4 file

Upgrade to 4.1.0-15 from updates.redhat.com or by using up2date, 
then add the following two lines to the Device section of your 
/etc/X11/XF86Config-4 file:

     Option     "XaaNoScanlineImageWriteRect"
     Option     "XaaNoScanlineCPUToScreenColorExpandFill"

That should prevent any lockups.  Also, if your mouse acts funny, 
or leaves mouse poop on the screen anywhere, use:

     Option     "swcursor"

Hope this helps,

Mike A. Harris                  Shipping/mailing address:
OS Systems Engineer             190 Pittsburgh Ave., Sault Ste. Marie,
XFree86 maintainer              Ontario, Canada, P6C 5B3
Red Hat Inc.                    Phone: (705)949-2136
http://www.redhat.com           ftp://people.redhat.com/mharris
Red Hat XFree86 mailing list:   xfree86-list redhat com
General open IRC discussion:    #xfree86 on irc.openprojects.net

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