System freeze - with logo_saver and high CPU load

Steve O'Hara-Smith steve at
Fri Oct 29 01:09:10 PDT 2010

On Thu, 28 Oct 2010 14:52:36 -0700 (PDT)
Matthew Dillon <dillon at> wrote:

> :	Hi,
> :
> :	I'm running v2.9.0.68.g57eab-DEVELOPMENT on an M4A78L motherboard
> :with a Phenom II 955 (quad core 3.2 GHz), however this has been happening
> :for a while but it's only now that I've pinned down the circumstances.
> :
> :	If I have the logo-saver running and displayed on the console
> then :anything that generates a high CPU load (make -j 8 buildworld in an
> ssh :session from another box does nicely) will lock the system up solid
. ..
>     The syscons console screen saver code in general is a real problem
>     for us.  It's getting hung up on the console spin lock.  I think it
>     is going to be a while before it gets fixed (it won't make the
> release).

	Not a big problem - it's not easy to get caught by this one
(I only found it because I started running the box without a monitor and
didn't think about disabling the screen saver).

Steve O'Hara-Smith                          |   Directable Mirror Arrays
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The computer obeys and wins.                |    licences available see
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