Colors of Noise

According to this Ubuntu bugreport some people still seem to have problems to hibernate 12" pbooks. Hibernate is working on these machines with patches since about Linux 2.6.5 and mainline support is there since about 2.6.12.

I used pbbuttonsd to hibernate for a long time and it worked really well but switched to using the Gnome/HAL infrastructure (which in turn uses pm-utils) recently since it has a much nicer integration into the rest of the desktop (locks the screen, etc.). There were two minor adjustments necessary to get things to work an a PowerBook6,1 and Powerbook6,4 within Debian:

• disable suspend since there's no code to reinitialize the card on resume by creating a file /etc/hal/fdi/information/pbook12.fdi:

  <!-- Apple PowerBook G4 12" can't resume due to nv graphics-->
  <deviceinfo version="0.2">
      <device> 
          <match key="openfirmware.model" string_outof="PowerBook6,1;Powerbook6,4">
              <merge key="power_management.can_suspend" type="bool">false</merge>
          </match>
      </device>
  </deviceinfo>
  

• switch to the console before hibernate (since a bug in the nv xorg driver crashes the system otherwise) by creating a file /etc/pm/sleep.d/00clear. The filename is important since we override the corresponding /usr/lib/pm-utils/sleep.d/00clear with it.

  #!/bin/sh
  #
  # hibernating under X doesn't work on the 12" pbook to problems in the
  # nv driver
  #
  # This overrides upstream's /usr/lib/pm-utils/sleep.d/00clear which
  # crashes on second hibernate
  case "$1" in
          hibernate)
              fgconsole > $VTSTATE
              chvt 01
          ;;
          thaw)
              [ -f $VTSTATE ] && chvt $(cat $VTSTATE)
          ;;
  esac