Bug#951000: xfce4-panel: constant CPU consumption when displaying logout menu
Dear Maintainer, could reproduce this inside a minimal amd64 qemu VM in current testing. In my test Xorg consumed on CPU completely, another thread xfce4/panel/wrapper-2.0 used 6% when this menu is opened. It looked like this process triggers redrawing in a fast loop, which seem most expensive on Xorg side. Another thing that might be related is this logging message that is constructed but never appears in any logfile as I see: #0 __vasprintf_internal (result_ptr=result_ptr@entry=0x7ffd775615b0, format=0x7fe32cafc6e8 "State %u for %s %p doesn't match state %u set via gtk_style_context_set_state ()", format@entry=0x7ffd775615b0 "", args=0x7ffd775615d8, mode_flags=mode_flags@entry=2) at vasprintf.c:34 ... #5 0x7fe32c1274dd in g_log_structured_standard (log_domain=log_domain@entry=0x7fe32ca94047 "Gtk", log_level=log_level@entry=G_LOG_LEVEL_DEBUG, file=file@entry=0x7fe32cafc740 "../../../../gtk/gtkstylecontext.c", line=, func=, message_format=) at ../../../glib/gmessages.c:1976 #6 0x7fe32c990a64 in gtk_style_context_push_state (context=context@entry=0x5601349a9150, state=state@entry=GTK_STATE_FLAG_NORMAL) at ../../../../gtk/gtkstylecontext.c:525 ... Kind regards, Bernhard # Bullseye/testing amd64 qemu VM 2020-10-18 apt update apt dist-upgrade apt install systemd-coredump mc htop psmisc net-tools gdb xfce4 libxfce4panel-2.0-4-dbgsym libglib2.0-0-dbgsym xserver-xorg-core-dbgsym libpixman-1-0-dbgsym libgtk-3-0-dbgsym libx11-6-dbgsym libxcb1-dbgsym linux-perf apt build-dep libxfce4panel-2.0-4 reboot mkdir /home/benutzer/source/libxfce4panel-2.0-4/orig -p cd/home/benutzer/source/libxfce4panel-2.0-4/orig apt source libxfce4panel-2.0-4 cd # Login # Open "User menu" taskset -pc 14 542 taskset -pc 15 876 root@debian:~# ps aux | grep -E "^USER|876|542" USER PID %CPU %MEMVSZ RSS TTY STAT START TIME COMMAND root 542 27.6 2.9 2628860 90952 tty7Rsl+ 21:54 10:10 /usr/lib/xorg/Xorg :0 -seat seat0 -auth /var/run/lightdm/root/:0 -nolisten tcp vt7 -novtswitch benutzer 876 1.4 5.9 203028 182108 ? Sl 21:54 0:31 /usr/lib/x86_64-linux-gnu/xfce4/panel/wrapper-2.0 /usr/lib/x86_64-linux-gnu/xfce4/panel/plugins/libactions.so 14 14680075 actions Aktionsknöpfe Abmelden, sperren oder andere Systemaktionen perf record -p 876 -g perf report (gdb) bt #0 __vasprintf_internal (result_ptr=result_ptr@entry=0x7ffd775615b0, format=0x7fe32cafc6e8 "State %u for %s %p doesn't match state %u set via gtk_style_context_set_state ()", format@entry=0x7ffd775615b0 "", args=0x7ffd775615d8, mode_flags=mode_flags@entry=2) at vasprintf.c:34 #1 0x7fe32c016238 in __vasprintf_chk (result_ptr=result_ptr@entry=0x7ffd775615b0, flag=flag@entry=1, format=format@entry=0x7ffd775615b0 "", ap=) at vasprintf_chk.c:36 #2 0x7fe32c16c47f in vasprintf (__ap=, __fmt=0x7ffd775615b0 "", __ptr=0x7ffd775615b0) at /usr/include/x86_64-linux-gnu/bits/stdio2.h:213 #3 g_vasprintf (string=string@entry=0x7ffd775615b0, format=, args=args@entry=0x7ffd775615d8) at ../../../glib/gprintf.c:337 #4 0x7fe32c13f95d in g_strdup_vprintf (format=, args=args@entry=0x7ffd775615d8) at ../../../glib/gstrfuncs.c:519 #5 0x7fe32c1274dd in g_log_structured_standard (log_domain=log_domain@entry=0x7fe32ca94047 "Gtk", log_level=log_level@entry=G_LOG_LEVEL_DEBUG, file=file@entry=0x7fe32cafc740 "../../../../gtk/gtkstylecontext.c", line=, func=, message_format=) at ../../../glib/gmessages.c:1976 #6 0x7fe32c990a64 in gtk_style_context_push_state (context=context@entry=0x5601349a9150, state=state@entry=GTK_STATE_FLAG_NORMAL) at ../../../../gtk/gtkstylecontext.c:525 #7 0x7fe32c991761 in gtk_style_context_get_property (context=0x5601349a9150, property=0x560133f65582 "background-color", state=GTK_STATE_FLAG_NORMAL, value=0x7ffd77561c00) at ../../../../gtk/gtkstylecontext.c:840 #8 0x7fe32c991945 in gtk_style_context_get_valist (context=context@entry=0x5601349a9150, state=state@entry=GTK_STATE_FLAG_NORMAL, args=args@entry=0x7ffd77561cb0) at ../../../../gtk/gtkstylecontext.c:876 #9 0x7fe32c991c3a in gtk_style_context_get (context=0x5601349a9150, state=state@entry=GTK_STATE_FLAG_NORMAL) at ../../../../gtk/gtkstylecontext.c:918 #10 0x560133f63ca3 in wrapper_plug_draw (widget=0x560134bd2470, cr=0x560134b9dc00) at wrapper-plug.c:221 #11 0x7fe32ca3c144 in gtk_widget_draw_internal (widget=widget@entry=0x560134bd2470, cr=cr@entry=0x560134b9dc00, clip_to_size=clip_to_size@entry=1) at ../../../../gtk/gtkwidget.c:7080 #12 0x7fe32ca45740 in gtk_widget_render (widget=widget@entry=0x560134bd2470, window=0x5601348f5900, region=) at ../../../../gtk/gtkwidget.c:17606 #13 0x7fe32c8e6798 in gtk_main_do_event (event=0x7ffd77561f50) at ../../../../gtk/gtkmain.c:1843 #14 gtk_main_do_event (event=) at ../../../../gtk/gtkmain.c:1690 #15 0x7fe32c5d0775 in _gdk_event_emit (event=event@entry=0x7ffd77561f50) at ../../../../gdk/gdkevents.c:73 #16
Processed: experimental bugs too
Processing commands for cont...@bugs.debian.org: > found 972417 1.7.0-1 Bug #972417 [xfce4-power-manager] xfce4-power-manager: System left idle => 'display power management' auto-locks session => no X session or lightdm greeter Marked as found in versions xfce4-power-manager/1.7.0-1. > thanks Stopping processing here. Please contact me if you need assistance. -- 972417: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=972417 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
Processed: found 1.6.6-1
Processing commands for cont...@bugs.debian.org: > found 972417 1.6.6-1 Bug #972417 [xfce4-power-manager] xfce4-power-manager: System left idle => 'display power management' auto-locks session => no X session or lightdm greeter Marked as found in versions xfce4-power-manager/1.6.6-1. > thanks Stopping processing here. Please contact me if you need assistance. -- 972417: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=972417 Debian Bug Tracking System Contact ow...@bugs.debian.org with problems
Bug#972417: xfce4-power-manager: System left idle => 'display power management' auto-locks session => no X session or lightdm greeter
Package: xfce4-power-manager Version: 1.6.1-1 Severity: grave Dear Maintainer, [ Bug description ] Bug happens when the screen auto-locks due to user inactivity. Then the screen switches off. To easily test that, set following to 1 min or so Xfce menu Applications -> Settings -> Power Manager -> Display -> 'Switch off after' After such auto-lock, it appears not possible to get back the X session anymore. Because - by moving mouse or typing on keyboard the screen does not wake up. It stays off, black. - with Ctrl+Alt-F7 one gets This session is locked You’ll be redirected to the unlock dialog automatically in a few seconds but after waiting a few seconds the screen switches off again. => no way to get to the lightdm greeter. In both cases: not possible to get back the running X session anymore. [ Guilty package ] Bug is _not_ triggered when user locks computer by doing any of Ctrl-Alt-Del xflock4 (in fact = Ctrl-Alt-Del) light-locker-command --lock dm-tool lock As moving the mouse or typing on keyboard wakes up the screen and display the lightdm greeter. => I filled this bug against xfce4-power-manager But I have no clue whether xfce4-power-manager - processes the locking completely by itself ? - just prepares locking, like deactivating keyboard/mouse? and then trigger like light-locker-command --lock... - only asks another package to do the full locking procedure. [ Workaround if locked out ] Following allows to get the running X session back: switch to tty1 by Ctrl+Alt+F1 funny note: sometimes the mouse pointer is displayed on top of tty1 (moving the mouse does not move pointer). log as root run loginctl unlock-sessions switch back to X by Alt+F7 [ Related packages version ] All below are up to date Buster packages dpkg -l "xfce4-power-manager" "lightdm*" "light-locker" "xfce4-session" ||/ NameVersion ii light-locker1.8.0-3 ii lightdm 1.26.0-4 un lightdm-greeter ii lightdm-gtk-greeter 2.0.6-1 ii xfce4-power-manager 1.6.1-1 ii xfce4-session 4.12.1-6 Bug occurred under (at least) both kernels: linux-image-4.19.0-11-amd64-unsigned 4.19.146-1 linux-image-5.8.0-0.bpo.2-amd64 5.8.10-1~bpo10+1 I tried Bullseye/Sid version: 1.6.6-1 by backporting it Bug still occurs. dpkg -l "xfce4-power-manager*" "lightdm*" "light-locker*" "xfce4-session*" "libxfce4ui*" ||/ NameVersion ii libxfce4ui-1-0:amd644.12.1-3 ii libxfce4ui-1-dev:amd64 4.12.1-3 ii libxfce4ui-2-0:amd644.14.1-1~bpo10+1 ii libxfce4ui-2-dev:amd64 4.14.1-1~bpo10+1 ii libxfce4ui-build-deps 4.14.1-1~bpo10+1 ii libxfce4ui-common 4.12.1-3 ii libxfce4ui-utils4.12.1-3 ii light-locker1.8.0-3 ii lightdm 1.26.0-4 un lightdm-greeter ii lightdm-gtk-greeter 2.0.6-1 ii xfce4-power-manager 1.6.6-1~bpo10+1 ii xfce4-power-manager-data1.6.6-1~bpo10+1 ii xfce4-power-manager-plugins 1.6.6-1~bpo10+1 ii xfce4-session 4.12.1-6 [ Severity justification ] As described in several reports, users usually handle the black screen by restarting the system or if users has root access: killall Xorg=> restarts X session killall lightdm => restarts X session killall light-locker=> X sessions won't lock anymore All except last cause loss of unsaved data, last causes a security concern. => severity = grave Also this bug gives a bad image to the user: - 'system crashed' - wondering what is the cause: - is my graphic card not properly waking up ? - or a bug in kernel ? - or Xorg ? - or light-locker ? ... Thus they are probably numerous of open bugs that could be closed by fixing this bug. [ Bugs reported against other packages, & that seem linked to this bug ] Bugs in source package light-locker #906902 System left idle makes system freeze #870641 light-locker, lightdm: screen stays off after resume and all the merged one: 805711, 846278, 868087, 908329, 922095, 929461, 929834, 931555 #835461 light-locker breaks suspend/resume with nvidia legacy 340 drivers Bugs in source package lightdm #867620 lightdm unlock screen randomly doesn't appear Kind regards, Franck Richter -- System Information: Debian Release: 10.6 APT prefers stable-updates APT policy: (500, 'stable-updates'), (500, 'proposed-updates'), (500, 'stable') Architecture: amd64 (x86_64) Kernel: Linux 5.8.0-0.bpo.2-amd64 (SMP w/4 CPU cores) Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /usr/bin/dash Init: systemd (via /run/systemd/system) LSM: AppArmor: enabled Versions of packages xfce4-power-manager depends on: ii libc6 2.28-10 ii libcairo2 1.16.0-4 ii
