AFAIK gnome-power-manager should change HAL PoweSave status according to the power supply if it is configured to do so in GConf /apps/gnome-power-manager/lowpower/on_battery Current PowerSave status can be displayed by executing "hal-get-property --udi /org/freedesktop/Hal/devices/computer --key power_management.is_powersave_set" The problem is that when I unplug the AC, powersave property doesn't change. However in the output of gnome-power-manager I can see that it is handling the cable unplug event, and my CPU frequency governer is changed by g-p-m correctly. I have gnome-power-manager-2.20.0, hal-0.5.9.1-r2 and dbus-1.0.2-r2 installed on my laptop. The system is up-to-date ~x86. Reproducible: Always Steps to Reproduce: 1. start g-p-m 2. unplug the ac cable Actual Results: the output of "hal-get-property --udi /org/freedesktop/Hal/devices/computer --key power_management.is_powersave_set" is still "false" Expected Results: g-p-m should send HAL SetPowerSave(1) message and is_powersave_set property should be changed to true # emerge --info Portage 2.1.3.16 (default-linux/x86/2007.0/desktop, gcc-4.2.2, glibc-2.6.1-r0, 2.6.24-rc1 i686) ================================================================= System uname: 2.6.24-rc1 i686 Intel(R) Pentium(R) M processor 1500MHz Timestamp of tree: Mon, 29 Oct 2007 19:00:01 +0000 app-shells/bash: 3.2_p17-r1 dev-java/java-config: 1.3.7, 2.1.2-r1 dev-lang/python: 2.5.1-r3 sys-apps/baselayout: 1.12.10-r5 sys-apps/sandbox: 1.2.18.1-r2 sys-devel/autoconf: 2.13, 2.61-r1 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2, 1.10 sys-devel/binutils: 2.18-r1 sys-devel/gcc-config: 1.4.0-r4 sys-devel/libtool: 1.5.24 virtual/os-headers: 2.6.23 ACCEPT_KEYWORDS="x86 ~x86" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi null plug rate route share shm softvol" ANT_HOME="/usr/share/ant-core" ARCH="x86" AUTOCLEAN="yes" CAMERAS="canon" CBUILD="i686-pc-linux-gnu" CCACHE_SIZE="2G" CFLAGS="-march=pentium-m -O2 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CLASSPATH="." 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g-p-m doesn't appear to set is_powersave_set at all. It's not in the source. g-p-m only uses can_suspend and can_hibernate from power_management. If you want g-p-m to set this, you'll have to get upstream to add it, as it's a feature request.
(In reply to comment #1) > g-p-m doesn't appear to set is_powersave_set at all. It's not in the source. > g-p-m only uses can_suspend and can_hibernate from power_management. If you > want g-p-m to set this, you'll have to get upstream to add it, as it's a > feature request. > The content of the following file looks strange to me in that case gnome-power-manager-2.20.0/libhal-glib/libhal-gpower.c: /** * hal_gpower_enable_power_save: * * @power: This class instance * @enable: True to enable low power mode * Return value: Success, true if we set the mode * * Uses org.freedesktop.Hal.Device.SystemPowerManagement.SetPowerSave () **/ gboolean hal_gpower_enable_power_save (HalGPower *power, gboolean enable) { gint retval = 0; GError *error = NULL; gboolean ret; DBusGProxy *proxy; g_return_val_if_fail (power != NULL, FALSE); g_return_val_if_fail (LIBHAL_IS_GPOWER (power), FALSE); proxy = dbus_proxy_get_proxy (power->priv->gproxy); if (DBUS_IS_G_PROXY (proxy) == FALSE) { g_warning ("proxy NULL!!"); return FALSE; } /* abort if we are not a "qualified" laptop */ if (hal_gpower_is_laptop (power) == FALSE) { g_debug ("We are not a laptop, so not even trying"); return FALSE; } ret = dbus_g_proxy_call (proxy, "SetPowerSave", &error, G_TYPE_BOOLEAN, enable, G_TYPE_INVALID, G_TYPE_UINT, &retval, G_TYPE_INVALID); if (retval != 0) { g_warning ("SetPowerSave failed in a horrible way!"); } return ret; }
http://www.gnome.org/projects/gnome-power-manager/faq.html#set_power_save The info is obsolute since HAL does already provide some actions to support SetPowerSave. But it confirms the fact that g-p-m uses this HAL functionality at least since 2006.
This requires HAL 0.5.10 if I'm not mistaken. @Doug, btw I can confirm that the new hal from gentopia I built yesterday works with g-p-m 2.20. The cpu settings are indeed properly set.
(In reply to comment #4) > This requires HAL 0.5.10 if I'm not mistaken. > > @Doug, btw I can confirm that the new hal from gentopia I built yesterday works > with g-p-m 2.20. The cpu settings are indeed properly set. > Rémi, but I have no warnings or errors in g-p-m output when it is (IMHO) sending the hal SetPowerSave(1). On the link that I gave in comment #3 there was a warning because that version of HAL didn't support SetPowerSave. Even with --verbose key I have no such warning messages in g-p-m output. By the way, didn't you notice if hal-0.5.9.1-r2 was working with g-p-m on your system?
Honestly, I haven't really looked at g-p-m beyond "oh it's broken" and "oh it works again". That's about as much info I can give you :) As for the latest hal in portage, I haven't tried it on my laptop as I'm using the gentopia overlay. I recommend you try the overlay, so far it seems to work much better with Gnome 2.20
No luck with newer versions of hal and dbus from Gentopia overlay. Can somebody please test the behavior of their g-p-m + hal?
Do you have any stderr output from g-p-m? It's supposed to work with the version from gentopia ...
(In reply to comment #8) > Do you have any stderr output from g-p-m? It's supposed to work with the > version from gentopia ... > Nothing is particular. I've added a debug statement to the g-p-m source to see if SetPowerSave is called, here's the output: $ LANG=C gnome-power-manager --no-daemon (gnome-power-manager:5600): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed (gnome-power-manager:5600): GLib-GObject-CRITICAL **: g_object_set: assertion `G_IS_OBJECT (object)' failed (gnome-power-manager:5600): GStreamer-CRITICAL **: gst_bin_add_many: assertion `GST_IS_ELEMENT (element_1)' failed (gnome-power-manager:5600): GStreamer-CRITICAL **: gst_element_link_many: assertion `GST_IS_ELEMENT (element_1)' failed ** (gnome-power-manager:5600): DEBUG: We are going to start SetPowerSave(0) ** (gnome-power-manager:5600): DEBUG: We are going to start SetPowerSave(1) ** (gnome-power-manager:5600): DEBUG: We are going to start SetPowerSave(0) --- The first call is initial g-p-m call after start. The second was when I unplugged the ac cable. And the third when I plugged it back. Here's the "patch" content, its very-very simple. diff -Nru gnome-power-manager-2.20.0.a/libhal-glib/libhal-gpower.c gnome-power-manager-2.20.0.b/libhal-glib/libhal-gpower.c --- gnome-power-manager-2.20.0.a/libhal-glib/libhal-gpower.c 2007-10-30 02:56:25.000000000 +0300 +++ gnome-power-manager-2.20.0.b/libhal-glib/libhal-gpower.c 2007-10-30 02:58:31.000000000 +0300 @@ -378,6 +378,8 @@ g_debug ("We are not a laptop, so not even trying"); return FALSE; } + + g_debug ("We are going to start SetPowerSave(%i)", enable); ret = dbus_g_proxy_call (proxy, "SetPowerSave", &error, G_TYPE_BOOLEAN, enable, -- the only thing that I know now, is that dbus_g_proxy_call is called with right "enable" parameter. But HAL's power_management.is_powersave_on property is not set correctly. It may be due to different reasons: 1) some other dbus_g_proxy_call parameters are wrong 2) dbus_g_proxy_call doesn't work at all - I think that it is almost impossible because g-p-m can successfully get suspend and hibernate abilities from HAL. 3) HAL doesn't properly handle SetPowerSave 4) etc It seems that we need some additional debugging. Any ideas?
Works for me with new hal-0.5.10 from portage.
