mailing list archives
Re: Xfree86 video buffering?
From: "Eric Paynter" <eric () arcticbears com>
Date: Thu, 24 Feb 2005 14:35:27 -0800 (PST)
On Wed, February 23, 2005 1:08 pm, KF (lists) said:
Recently I have noticed that after shutting down my machine or rebooting
my X-windows will briefly flash an image of whatever I was doing when I
rebooted the machine or logged out.
As an example if I was browsing porn at night in mozilla just before I
clicked "K->Logout...->Reboot Computer" in KDE, the next morning when my
Girlfriend turns my computer on she gets a quick 2 second shot of my
porn just before the KDM login screen.
What causes this? Can it be prevented? I can certainly see sensitive
data potentially being leaked via this quirk.
All kidding aside, this seems to be a real security issue. Your system
shouldn't be showing unauthorized users what you were doing. It should
properly flush the memory.
Does a power off flush it?
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