"hack" = screensaver graphic/theme. This is slang used by the
screensaver authors. The screensaver back-end (gnome-screensaver) just
takes care of checking for keyboard activity etc and starts a program
(the hack) that draws something on the screen. In fact, any program that
just draws something on the screen can be used as a screensaver hack.
The hack can be run standalone by running
"/usr/lib/xscreensaver/molecule" but will then just run in a window. To
test it fullscreen, add the option "-root". But since this will draw on
the "root" window which often is hidden by desktop backgrounds etc, try
this is in a "failsafe terminal session" from the login screen.
Most of the hacks used by gnome-screensaver come from the "xscreensaver"
source package. Ted referred to him changing this bug's attributes,
reassigning it to "xscreensaver" so that the relevant developers and bug
triagers are noticed about your bug report.
If one particular hack makes the computer crash it is probably a bug in
the graphic card driver, triggered by the hack. So usually these bugs
end up in the collection of bug reports for the graphic driver in
question. The hack makes drawing requests to the graphic subsystem (X11
and for 3D graphics in particular, using the "mesa" libraries) and, in
principle, none of these requests (faulty or not) should hang the
machine.
Fixing bugs in the card drivers is generally out of scope for the Ubuntu
development (limited manpower and thus hard priority decisions), but we
try to analyze and isolate the problems, and if we can collect enough
details, we forward the bug "upstream", to the developers of the X11
graphic drivers on bugs.freedesktop.org
Can you all please run "lspci -nn | grep VGA" so that we can identify
which cards have this exact problem? Can you reproduce it running
molecule stand-alone? In window? Fullscreen?
You can force your AGP cards to run PCI instead with the "ForcePCIMode"
device option in /etc/X11/xorg.conf. Please try this, and verify in
/var/log/Xorg.0.log that the option was correctly applied.
** Changed in: xscreensaver (Ubuntu)
Assignee: (unassigned) => Tormod Volden (tormodvolden)
Status: Confirmed => Incomplete
--
Selecting the Molecule screensaver makes the PC freeze. It is completely
unresponsive.
https://bugs.launchpad.net/bugs/106060
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