Till devs do not find a real solution I made a BLOODY BRUTAL workaround which
helps me.
PLEASE understand what my program is doing and decide if it is suits you or not.
I found "cpulimit" (can be installed from software center - at least in Ubuntu
15.10) which slows down a particular thread.
No, "nice" does not do the work, because "nice" just gives priorities and here
we want that CPUs do not do "anything".
I wrote a small python script which
- checks if screen lock OR screensaver became active, if yes, it limits that
thread with "cpulimit"
- checks if screen lock OR screensaver became inactive, if yes, ir removes all
limitation
Again, it slows down compiz so violently as possible.
With my system the keyboard lock (Alt-Ctrl-L) fades out for 5-10 secs...
when I enter my password dots has 1 sec lag...
Screensaver part is added to eliminate this lock-screen delay.
Under "normal use" screensaver deactivates earlier, so compiz became much more
responsive.
If your programs use compiz during screen lock, it is VERY LIKELY that
this script will slow down or somehow affect those programs as well, so
use it wisely!
For the script running you have to install python-dbus if you did not do it so
far:
sudo apt-get install python-dbus
The python script itself:
#!/usr/bin/env python
import gobject
import dbus
import os
from dbus.mainloop.glib import DBusGMainLoop
def lock_and_screensaver_filter(bus, message):
EventMember =message.get_member()
if EventMember == "EventEmitted":
args = message.get_args_list()
if args[0] == "desktop-lock":
os.system("cpulimit -b -P /usr/bin/compiz -l 1")
elif args[0] == "desktop-unlock":
os.system("pkill cpulimit")
elif EventMember == "ActiveChanged":
args = message.get_args_list()
if args[0] == True:
os.system("cpulimit -b -P /usr/bin/compiz -l 1")
else:
os.system("pkill cpulimit")
DBusGMainLoop(set_as_default=True)
bus = dbus.SessionBus()
bus.add_match_string("type='signal',interface='com.ubuntu.Upstart0_6'")
bus.add_match_string("type='signal',interface='org.gnome.ScreenSaver'")
bus.add_message_filter(lock_and_screensaver_filter)
mainloop = gobject.MainLoop()
mainloop.run()
--
You received this bug notification because you are a member of compiz
packagers, which is subscribed to compiz in Ubuntu.
https://bugs.launchpad.net/bugs/1322751
Title:
Compiz running on Intel Haswell GPU has 100% CPU usage when computer
is locked
To manage notifications about this bug go to:
https://bugs.launchpad.net/compiz/+bug/1322751/+subscriptions
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