I thought, the QSystemTrayIcon is in the notification area,
automatically. Because we have this area activated and it only appears
within this area.
Here ist the output of dbus-monitor:
QT4 app:
method call time=1530618711.195260 sender=:1.901 ->
destination=org.freedesktop.DBus serial=1 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=Hello
method return time=1530618711.195277 sender=org.freedesktop.DBus ->
destination=:1.901 serial=1 reply_serial=1
string ":1.901"
signal time=1530618711.195283 sender=org.freedesktop.DBus -> destination=(null
destination) serial=5 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=NameOwnerChanged
string ":1.901"
string ""
string ":1.901"
signal time=1530618711.195291 sender=org.freedesktop.DBus -> destination=:1.901
serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus;
member=NameAcquired
string ":1.901"
method call time=1530618711.195759 sender=:1.901 ->
destination=org.freedesktop.DBus serial=2 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string "type='signal',member='NameOwnerChanged',arg0='org.gnome.GConf'"
method call time=1530618711.199344 sender=:1.901 ->
destination=org.freedesktop.DBus serial=3 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string
"type='method_call',interface='org.gnome.GConf.Database',member='Notify'"
method call time=1530618711.199795 sender=:1.901 ->
destination=org.freedesktop.DBus serial=4 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string "type='signal',interface='org.gnome.GConf.Server',member='Bye'"
method call time=1530618711.200079 sender=:1.901 ->
destination=org.freedesktop.DBus serial=5 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string "type='signal',member='Disconnected'"
method call time=1530618711.200335 sender=:1.901 ->
destination=org.freedesktop.DBus serial=6 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=StartServiceByName
string "org.gnome.GConf"
uint32 0
method return time=1530618711.200347 sender=org.freedesktop.DBus ->
destination=:1.901 serial=3 reply_serial=6
uint32 2
method call time=1530618711.200694 sender=:1.901 -> destination=org.gnome.GConf
serial=7 path=/org/gnome/GConf/Server; interface=org.gnome.GConf.Server;
member=GetDefaultDatabase
method return time=1530618711.200704 sender=:1.79 -> destination=:1.901
serial=217 reply_serial=7
object path "/org/gnome/GConf/Database/0"
method call time=1530618711.200822 sender=:1.901 -> destination=org.gnome.GConf
serial=8 path=/org/gnome/GConf/Database/0; interface=org.gnome.GConf.Database;
member=LookupExtended
string "/desktop/gnome/interface/menus_have_icons"
string "en_US.UTF-8"
boolean true
method return time=1530618711.200836 sender=:1.79 -> destination=:1.901
serial=218 reply_serial=8
struct {
string "/desktop/gnome/interface/menus_have_icons"
struct {
int32 4
boolean false
}
boolean true
string "/schemas/desktop/gnome/interface/menus_have_icons"
boolean true
boolean true
}
signal time=1530618711.211488 sender=:1.793 -> destination=(null destination)
serial=282 path=/org/gnome/SessionManager; interface=org.gnome.SessionManager;
member=ClientAdded
object path "/org/gnome/SessionManager/Client50"
method call time=1530618711.230086 sender=:1.902 ->
destination=org.freedesktop.DBus serial=1 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=Hello
method return time=1530618711.230106 sender=org.freedesktop.DBus ->
destination=:1.902 serial=1 reply_serial=1
string ":1.902"
signal time=1530618711.230114 sender=org.freedesktop.DBus -> destination=(null
destination) serial=6 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=NameOwnerChanged
string ":1.902"
string ""
string ":1.902"
signal time=1530618711.230122 sender=org.freedesktop.DBus -> destination=:1.902
serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus;
member=NameAcquired
string ":1.902"
method call time=1530618711.232693 sender=:1.902 ->
destination=org.freedesktop.DBus serial=2 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string
"type='signal',interface='ca.desrt.dconf.Writer',path='/ca/desrt/dconf/Writer/user',arg0path='/com/canonical/desktop/interface/'"
method return time=1530618711.232715 sender=org.freedesktop.DBus ->
destination=:1.902 serial=3 reply_serial=2
QT5 app (I removed the menu, there):
signal time=1530618674.574963 sender=:1.793 -> destination=(null destination)
serial=280 path=/org/gnome/SessionManager; interface=org.gnome.SessionManager;
member=ClientAdded
object path "/org/gnome/SessionManager/Client49"
method call time=1530618674.580873 sender=:1.899 ->
destination=org.freedesktop.DBus serial=1 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=Hello
method return time=1530618674.580889 sender=org.freedesktop.DBus ->
destination=:1.899 serial=1 reply_serial=1
string ":1.899"
signal time=1530618674.580895 sender=org.freedesktop.DBus -> destination=(null
destination) serial=7 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=NameOwnerChanged
string ":1.899"
string ""
string ":1.899"
signal time=1530618674.580902 sender=org.freedesktop.DBus -> destination=:1.899
serial=2 path=/org/freedesktop/DBus; interface=org.freedesktop.DBus;
member=NameAcquired
string ":1.899"
method call time=1530618674.584173 sender=:1.899 ->
destination=org.freedesktop.DBus serial=2 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string
"type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.kde.StatusNotifierWatcher',arg1=''"
method call time=1530618674.584828 sender=:1.899 ->
destination=org.kde.StatusNotifierWatcher serial=3 path=/StatusNotifierWatcher;
interface=org.freedesktop.DBus.Introspectable; member=Introspect
error time=1530618674.584840 sender=org.freedesktop.DBus -> destination=:1.899
error_name=org.freedesktop.DBus.Error.ServiceUnknown reply_serial=3
string "The name org.kde.StatusNotifierWatcher was not provided by any
.service files"
method call time=1530618674.585247 sender=:1.899 ->
destination=org.freedesktop.DBus serial=4 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string
"type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.kde.StatusNotifierWatcher'"
method call time=1530618674.585467 sender=:1.899 ->
destination=org.freedesktop.DBus serial=5 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=GetNameOwner
string "org.kde.StatusNotifierWatcher"
error time=1530618674.585479 sender=org.freedesktop.DBus -> destination=:1.899
error_name=org.freedesktop.DBus.Error.NameHasNoOwner reply_serial=5
string "Could not get owner of name 'org.kde.StatusNotifierWatcher': no such
name"
method call time=1530618674.585848 sender=:1.899 ->
destination=org.freedesktop.DBus serial=6 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=RemoveMatch
string
"type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.kde.StatusNotifierWatcher'"
method call time=1530618674.586185 sender=:1.899 ->
destination=org.freedesktop.DBus serial=7 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=RemoveMatch
string
"type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.freedesktop.DBus'"
error time=1530618674.586203 sender=org.freedesktop.DBus -> destination=:1.899
error_name=org.freedesktop.DBus.Error.MatchRuleNotFound reply_serial=7
string "The given match rule wasn't found and can't be removed"
method call time=1530618674.586718 sender=:1.899 ->
destination=org.freedesktop.DBus serial=8 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=RemoveMatch
string
"type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.kde.StatusNotifierWatcher',arg1=''"
method call time=1530618674.616023 sender=:1.899 ->
destination=org.freedesktop.DBus serial=9 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string
"type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.a11y.Bus',arg1=''"
method call time=1530618674.616979 sender=:1.899 ->
destination=org.freedesktop.DBus serial=10 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=NameHasOwner
string "org.a11y.Bus"
method return time=1530618674.616995 sender=org.freedesktop.DBus ->
destination=:1.899 serial=6 reply_serial=10
boolean true
method call time=1530618674.617356 sender=:1.899 ->
destination=org.freedesktop.DBus serial=11 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=AddMatch
string
"type='signal',sender='org.freedesktop.DBus',interface='org.freedesktop.DBus',member='NameOwnerChanged',arg0='org.a11y.Bus'"
method call time=1530618674.617706 sender=:1.899 ->
destination=org.freedesktop.DBus serial=12 path=/org/freedesktop/DBus;
interface=org.freedesktop.DBus; member=GetNameOwner
string "org.a11y.Bus"
method return time=1530618674.617717 sender=org.freedesktop.DBus ->
destination=:1.899 serial=7 reply_serial=12
string ":1.7"
method call time=1530618674.618272 sender=:1.899 -> destination=org.a11y.Bus
serial=13 path=/org/a11y/bus; interface=org.freedesktop.DBus.Properties;
member=Get
string "org.a11y.Status"
string "ScreenReaderEnabled"
method return time=1530618674.618362 sender=:1.7 -> destination=:1.899
serial=245 reply_serial=13
variant boolean false
--
You received this bug notification because you are a member of Desktop
Packages, which is subscribed to gnome-panel in Ubuntu.
https://bugs.launchpad.net/bugs/1779663
Title:
QT4 Tray application and CPU load in 18.04
Status in gnome-panel package in Ubuntu:
Incomplete
Bug description:
Ubuntu 18.04 LTS
Session: gnome-flashback
Tested with: gnome-panel: 3.26.0-1ubuntu5 / 3.28.0-1ubuntu1 (cosmic)
We recognized a steady CPU load of about 2% when starting our QT4 tray
application. To eliminate any issues in our application, we created a
minimal python qt4 tray app (attached).
As soon as this app is started, the gnome-panel process gets a CPU load of
about 2%.
When stracing the gnome-panel, we recognize a repeating log pattern:
poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=6, events=POLLIN}],
3, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\212\5\4\0f\26 \0\0\0\26\0\26\0\2\0\217\3\4\0U\1 \0f\26
\0\0\0\0\0"..., iov_len=40}, {iov_base=NULL, iov_len=0}, {iov_base="",
iov_len=0}], 3) = 40
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=6, events=POLLIN}],
3, 13) = 0 (Timeout)
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="5 \4\0g\26 \0\3\0 \0\26\0\2\0\213\4\6\0h\26 \0g\26
\0&\0\0\0"..., iov_len=236}, {iov_base=NULL, iov_len=0}, {iov_base="",
iov_len=0}], 3) = 236
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="[\2\353kT\1
\0U\1 \0\200)y\0\0\0\26\0\26\0\2\0\n\5h\3\26\0\30\0", iov_len=4096}],
msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=6, events=POLLIN}],
3, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="\212\5\4\0i\26 \0\0\0\26\0\26\0\2\0\217\3\4\0U\1 \0i\26
\0\0\0\0\0"..., iov_len=40}, {iov_base=NULL, iov_len=0}, {iov_base="",
iov_len=0}], 3) = 40
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=6, events=POLLIN}],
3, 13) = 0 (Timeout)
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
writev(3, [{iov_base="5 \4\0j\26 \0\3\0 \0\26\0\2\0\213\4\6\0k\26 \0j\26
\0&\0\0\0"..., iov_len=236}, {iov_base=NULL, iov_len=0}, {iov_base="",
iov_len=0}], 3) = 236
recvmsg(3, {msg_name=NULL, msg_namelen=0, msg_iov=[{iov_base="[\2\371kT\1
\0U\1 \0\217)y\0\0\0\26\0\26\0\2\0\n\5h\3\26\0\30\0", iov_len=4096}],
msg_iovlen=1, msg_controllen=0, msg_flags=0}, 0) = 32
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
poll([{fd=3, events=POLLIN}, {fd=4, events=POLLIN}, {fd=6, events=POLLIN}],
3, 0) = 0 (Timeout)
poll([{fd=3, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=3, revents=POLLOUT}])
The trayapp is doing nothing. Can anybody explain how to stop this behaviour
in gnome-panel? Thanks!
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https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1779663/+subscriptions
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