[Bug 1779663] Re: QT4 Tray application and CPU load in 18.04
[Expired for gnome-panel (Ubuntu) because there has been no activity for 60 days.] ** Changed in: gnome-panel (Ubuntu) Status: Incomplete => Expired -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1779663 Title: QT4 Tray application and CPU load in 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1779663/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 1779663] Re: QT4 Tray application and CPU load in 18.04
It was not a big task to convert my application to a qt5 app, which I did this afternoon. The CPU load is gone, now, and for me, this is the solution to my problem. I appreciate your help, thanks! -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1779663 Title: QT4 Tray application and CPU load in 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1779663/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 1779663] Re: QT4 Tray application and CPU load in 18.04
> Could not get owner of name 'org.kde.StatusNotifierWatcher': no such name Oh, it looks like I was wrong then. There are two ways to get icons in the panel: via indicator-application and via the old X11 tray. The indicator-based tray is default if you have the standard panel configuration (with indicator-applet added to the panel). But it looks like you don’t have it, so the X11 tray is used instead. You can try adding indicator-applet to the panel and see if this helps. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1779663 Title: QT4 Tray application and CPU load in 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1779663/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 1779663] Re: QT4 Tray application and CPU load in 18.04
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.freed
[Bug 1779663] Re: QT4 Tray application and CPU load in 18.04
I think it is a bug in sni-qt that sends too many events to gnome-panel. Other panels like fbpanel do not use indicators so the X11 tray is used there, which does not have the issue. sni-qt is also unmaintained so I doubt that this will be fixed. You can use the X11 tray with gnome-panel too, by removing sni-qt package and adding “Notification area” applet to the panel. If you want to further debug the issue, output of dbus-monitor may be more interesting than strace output. -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1779663 Title: QT4 Tray application and CPU load in 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1779663/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
[Bug 1779663] Re: QT4 Tray application and CPU load in 18.04
Tried the same python minimal application with pyqt5 (qt 5.9.5) - and
no, it does not happen.
So it seems to be a QT4 problem somehow in connection to the gnome-
panel, because this does not happen with the same QT4 application and
fbpanel in the same environment.
stracing the gnome-panel with this pyqt5 app, a similar output is
logged, but not as frequent as with qt4:
restart_syscall(<... resuming interrupted poll ...>) = 1
recvmsg(3, {msg_name=NULL, msg_namelen=0,
msg_iov=[{iov_base="\34\0\260\202\275\2\0\0\21\2\0\0:\201\247\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\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)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
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,
-1) = 1 ([{fd=3, revents=POLLIN}])
recvmsg(3, {msg_name=NULL, msg_namelen=0,
msg_iov=[{iov_base="\34\0\260\202\275\2\0\0\21\2\0\0R\324\247\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\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)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
recvmsg(3, {msg_namelen=0}, 0) = -1 EAGAIN (Resource temporarily
unavailable)
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,
-1
I attached the pyqt5 tray app if somebody wants to take a look at that.
But the CPU load disappears with QT5.
** Attachment added: "python-tray-qt5.tar.gz"
https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1779663/+attachment/5159066/+files/python-tray-qt5.tar.gz
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https://bugs.launchpad.net/bugs/1779663
Title:
QT4 Tray application and CPU load in 18.04
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[Bug 1779663] Re: QT4 Tray application and CPU load in 18.04
Qt 4 is no longer supported. Does it happen with Qt 5? ** Changed in: gnome-panel (Ubuntu) Status: New => Invalid ** Changed in: gnome-panel (Ubuntu) Status: Invalid => Incomplete -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-panel in Ubuntu. https://bugs.launchpad.net/bugs/1779663 Title: QT4 Tray application and CPU load in 18.04 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-panel/+bug/1779663/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
