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bug-guix@HIDDEN:bug#68055; Package guix.
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From: Feng Shu <tumashu@HIDDEN>
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Subject: lightdm and lightdm-gtk-greeter do not show session menu in guix.
Date: Wed, 27 Dec 2023 15:14:15 +0800
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See previous info: https://issues.guix.gnu.org/57168
> It works fine, but there are a few gotchas:
> 1. The session selection menu doesn't show the items. I don't know why.
> Perhaps a regresssion with newer GTK+.
I use below code to test:
1. lightdm-gtk-greeter code:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >
> /* Session menu */ =
>
> g_debug ("XXXX: Call lightdm_get_sessions functions from main"); =
>
> items =3D lightdm_get_sessions (); =
>
> g_debug ("XXXX: Session menuitem create start."); =
>
> if (gtk_widget_get_visible (session_menuitem)) =
>
> { =
>
> GSList *sessions =3D NULL; =
>
> =
>
> if (gtk_icon_theme_has_icon (icon_theme, "document-properties-sym=
bolic")) >
> session_badge =3D gtk_image_new_from_icon_name ("document-pro=
perties-symbolic", GTK_ICON_SIZE_MENU); >
> else =
>
> session_badge =3D gtk_image_new_from_icon_name ("document-pro=
perties", GTK_ICON_SIZE_MENU); >
> gtk_widget_show (session_badge); =
>
> gtk_container_add (GTK_CONTAINER (session_menuitem), session_badg=
e); >
> =
>
> items =3D lightdm_get_sessions (); =
>
> for (item =3D items; item; item =3D item->next) =
>
> { =
>
> LightDMSession *session =3D item->data; =
>
> GtkWidget *radiomenuitem; =
>
> =
>
> g_debug ("XXXX: Session items: %s", lightdm_session_get_key (=
session)); >
> =
>
> radiomenuitem =3D gtk_radio_menu_item_new_with_label (session=
s, lightdm_session_get_name (session)); >
> g_object_set_data (G_OBJECT (radiomenuitem), SESSION_DATA_KEY=
, (gpointer) lightdm_session_get_key (session)); >
> sessions =3D gtk_radio_menu_item_get_group (GTK_RADIO_MENU_IT=
EM (radiomenuitem)); >
> g_signal_connect (G_OBJECT (radiomenuitem), "activate", G_CAL=
LBACK (session_selected_cb), NULL); >
> gtk_menu_shell_append (GTK_MENU_SHELL (session_menu), radiome=
nuitem); >
> gtk_widget_show (GTK_WIDGET (radiomenuitem)); =
>
> } =
>
> =
>
> set_session (NULL); =
>
> } =
>
> =
>
> g_debug ("XXXX: Session menuitem create stop."); =
>
> =
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >
2. liblightdm_gobject code:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>> >
> /** =
>
> * lightdm_get_sessions: =
>
> * =
>
> * Get the available sessions. =
>
> * =
>
> * Return value: (element-type LightDMSession) (transfer none): A list of=
#LightDMSession >
> **/ =
>
> GList * =
>
> lightdm_get_sessions (void) =
>
> { =
>
> g_debug ("Run lightdm_get_session function.");=20=20=20=20
> update_sessions (); =
>
> return local_sessions; =
>
> } =
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>>> >
In my debian machine, it will show the below log, and I find that
lightdm_get_session will be called successfully.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >
> DEBUG-Message: 10:51:53.859: XXXX: Call lightdm_get_sessions functions fr=
om main >
> DEBUG-Message: 10:51:53.859: Run lightdm_get_session function. =
>
> DEBUG-Message: 10:51:53.859: Sessions_dir /usr/share/lightdm/sessions:/us=
r/share/xsessions:/usr/share/wayland-sessions >
> DEBUG-Message: 10:51:53.859: Run lightdm_session_class_init. =
>
> DEBUG-Message: 10:51:53.859: Run lightdm_session_init. =
>
> DEBUG-Message: 10:51:53.859: Loaded session /usr/share/xsessions/lightdm-=
xsession.desktop (Default Xsession, ) >
> DEBUG-Message: 10:51:53.860: Run lightdm_session_init. =
>
> DEBUG-Message: 10:51:53.860: Loaded session /usr/share/xsessions/xfce.des=
ktop (Xfce =E4=BC=9A=E8=AF=9D, =E4=BD=BF=E7=94=A8=E6=AD=A4=E4=BC=9A=E8=AF=
=9D=E5=B0=86 Xfce =E4=BD=9C=E4=B8=BA=E6=82=A8=E7=9A=84=E6=A1=8C=E9=9D=A2=E7=
=8E=AF=E5=A2=83=E8=BF=90=E8=A1=8C) >
> DEBUG-Message: 10:51:53.860: Run lightdm_session_init. =
>
> DEBUG-Message: 10:51:53.860: Loaded session /usr/share/xsessions/icewm-se=
ssion.desktop (IceWM Session, =E6=AD=A4=E4=BC=9A=E8=AF=9D=E4=BD=BF=E6=82=A8=
=E7=99=BB=E5=BD=95=E5=88=B0 IceWM) >
> DEBUG-Message: 10:51:53.861: Run lightdm_session_init. =
>
> DEBUG-Message: 10:51:53.861: Loaded session /usr/share/wayland-sessions/w=
eston.desktop (Weston, The reference Wayland server) >
> DEBUG-Message: 10:51:53.861: XXXX: Session menuitem create start. =
>
> DEBUG-Message: 10:51:53.864: Run lightdm_get_session function. =
>
> DEBUG-Message: 10:51:53.864: XXXX: Session items: lightdm-xsession =
>
> DEBUG-Message: 10:51:53.864: XXXX: Session items: icewm-session =
>
> DEBUG-Message: 10:51:53.864: XXXX: Session items: weston =
>
> DEBUG-Message: 10:51:53.864: XXXX: Session items: xfce =
>
> DEBUG-Message: 10:51:53.864: XXXX: Call lightdm_get_sessions functions fr=
om set_session, argument: (null) >
> DEBUG-Message: 10:51:53.864: Run lightdm_get_session function. =
>
> DEBUG-Message: 10:51:53.864: XXXX: Call lightdm_get_sessions functions fr=
om set_session, argument: xfce >
> DEBUG-Message: 10:51:53.864: Run lightdm_get_session function. =
>
> DEBUG-Message: 10:51:53.864: XXXX: Session menuitem create stop. =
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >
But in guix, lightdm_get_sessions seem to not be called, for I can not
find string "Run lightdm_get_session function. " in log file, just like
the below:
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >
> DEBUG-Message: 10:51:53.859: XXXX: Call lightdm_get_sessions functions fr=
om main >
> DEBUG-Message: 10:51:53.861: XXXX: Session menuitem create start. =
>
> DEBUG-Message: 10:51:53.864: XXXX: Session menuitem create stop. =
>
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>=
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> >
liblightdm-gobject shared library seem to be loaded, for when I remove this=
lib,
gtk-greeter will not show.=20
but why lightdm_get_sessions function do not be called while
liblightdm-gobject is loaded?=20
--=20
Feng Shu <tumashu@HIDDEN>:bug-guix@HIDDEN.
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