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To: Yong Liu <yongliu@public.bta.net.cn>
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Subject: Re: [Fwd: Notebook Problem]
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According to the Linux people, this is due to a compatibility issue
between XFree86 and DPMS (e.g. Advanced Power Management (APM) feature
that shuts down power to the display screen).

Upgrading to XFree86-3.3.1 (available now at ftp://ftp.Xfree86.org/), or
disabling display blanking in your APM BIOS should solve the problem.