[Pkg-acpi-devel] Bug#653205: Bug#653205: acpi-support: screen is dark without backlight after resume.

[t3rkwd at gmail.com]

Hi.

At Thu, 12 Jan 2012 09:49:30 +0100,
Michael Meskes wrote:

> I checked all possible setups on my system and they all work. Which kernel do 
> you have? Does it still happen with the latest 3.1 kernel from sid? 
> 
> Also what happens of you change the setting of DISPLAY_DPMS in 
> /etc/default/acpi-support? 
> 
> There were some problems in -9 that may have resulted in this part of the code 
> not being executed at all. So maybe that fix made another problem visible.

It still happen with the latest 3.1 kernel(linux-image-3.1.0-1-amd64_3.1.8-2_amd64.deb).

I cheacked script.
For the next case, behave differently in 0.138-9 and 0.138-10.
  0.138-9: "/usr/sbin/vbetool dpms off" is not called.
  0.138-10: "/usr/sbin/vbetool dpms off" is called.
I think that a cause is this.


--------------------------------------------------

LID_SLEEP: "true"
LOCK_SCREEN: "true"
XAUTHORITY: ""

0.138-9:
 lid.sh
  | if [ x$LID_SLEEP = xtrue ]; then
  |   [ -x /etc/acpi/sleep.sh ] && /etc/acpi/sleep.sh
  | fi

 sleep.sh
  | if [ x$LOCK_SCREEN = xtrue ]; then
  |   if pidof xscreensaver > /dev/null; then
  |     if [ x"$XAUTHORITY" != x"" ]; then
  |	      . /usr/share/acpi-support/screenblank # skip, vbetool dpms is not called.
  |     fi
  |   fi
  | fi


0.138-10:
 lid.sh
  | if [ x$LID_SLEEP = xtrue ]; then
  |   [ -x /etc/acpi/sleep.sh ] && /etc/acpi/sleep.sh
  | else
  |   . /usr/share/acpi-support/screenblank
  | fi

 sleep.sh
  | if [ x$LOCK_SCREEN = xtrue ]; then
  |   . /usr/share/acpi-support/screenblank
  | fi

 screenblank
  | if [ x"$XAUTHORITY" != x"" ]; then
  |   if [ x$LOCK_SCREEN = xtrue ]; then
  |     ....
  |   fi
  | else
  |   [ -x /usr/sbin/vbetool ] && /usr/sbin/vbetool dpms off # call
  | fi

--------------------------------------------------
   

Best Regards.

-- 
  Tetsutaro KAWADA / t3rkwd at gmail.com