On Sat, May 08, 2004 at 01:11:58PM -0700, Vibol Hou wrote:
Just out of curiousity, I was reviewing the kernel proper for the
code
that is executed as the system enters suspend and it appears to be
allocating a VT and switching to it to display debug messages. This
appears to be causing my screen to switch back on since I have a script
that shuts off my display when I initiate sleep mode (script found at:
http://ltswww.epfl.ch/~dsanta/resources/dell-i8500-linux). I modified
the script to work with 2.6.
My question is; is it necessary for the kernel to do all this terminal
switching? I'm tempted to patch the kernel to remove the
allocation/switching/debug code but I'd like to know if this was done
for a reason (other than to output the debug messages).
Terminal switching, yes, in most cases. Debug code, no, and I think it can
be turned off by writing to the proper file in /proc or suspending with
the proper flags. I don't recall which one and what, as it changed a few
times. Maybe there's some documentation, or at least the kernel source.
Regards,
Luciano Rocha