** Attachment added: "i'm spyin' on ur googls!"
http://launchpadlibrarian.net/35113770/broken-lock-2.jpg
** Description changed:
Sometimes when the screen is locked and I press a key to unlock it, I
see my entire desktop and open windows under the password dialog box.
That's a security problem.
I believe this is a compositing / video memory issue, because of the
following factors:
+
1.) It is intermittent, but occurs most when the screen is "busy" (lots of
graphics-heavy windows open).
- 2.) I can almost always reproduce it by doing something video-intensive, such
as x11perf.
- 3.) Sometimes everything will be visible except that one or two windows, or
the "active" portions thereof, will be blacked out.
- 4.) I have seen other compositing / video memory glitches, such as the
contents of a previously closed window appearing briefly in a newly opened
window before it completes drawing (another security issue in its own right).
- 5.) The desktop is shown as it appeared when the screen was locked, and does
not update while locked.
- 6.) I am unable to reproduce the issue with compositing ("desktop effects")
disabled.
- Note that the desktop is not dimmed; it is visible for as long as you
- want to stare at it, even after the password prompt has disappeared; and
- I am using dualhead and both screens are visible, so this is not a
- duplicate of #390989 or #385102 or #417722, though it is probably
- related. I have attached a screenshot (acquired via VNC) demonstrating
- the problem.
+ 2.) I can almost always reproduce it by doing something video-intensive,
+ such as x11perf.
+
+ 3.) Sometimes everything will be visible except that one or two windows,
+ or the "active" portions thereof, will be blacked out.
+
+ 4.) I have seen other compositing / video memory glitches, such as the
+ contents of a previously closed window appearing briefly in a newly
+ opened window before it completes drawing (another security issue in its
+ own right).
+
+ 5.) The desktop is shown as it appeared when the screen was locked, and
+ does not update while locked.
+
+ 6.) I am unable to reproduce the issue with compositing ("desktop
+ effects") disabled.
+
+
+ Note that the desktop is not dimmed; it is visible for as long as you want to
stare at it, even after the password prompt has disappeared; and I am using
dualhead and both screens are visible, so this is not a duplicate of #390989 or
#385102 or #417722, though it is probably related. I have attached two
screenshots (acquired via VNC) demonstrating the problem.
I'm running Kubuntu 9.04 x86-64 with all updates, using the NVidia
180.44 binary driver with TwinView on a GeForce 8400 GS.
--
Desktop visible when screen is locked in Kubuntu
https://bugs.launchpad.net/bugs/474654
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