Also happening here using latest nvidia drivers (331.113), CPU usage of compiz climbs when using the TV out on my GeForce GTS 250. I've been using this setup for years and this high CPU usage making the whole Unity almost unusable is very recent, a few weeks at most.
Running sudo perf top -p $COMPIZ_PID: Single monitor: (compiz cpu% in top is around 2-3%) 21.40% [kernel] [k] _nv013274rm 4.07% [kernel] [k] rm_check_pci_config_space 1.26% libc-2.19.so [.] _int_malloc 0.85% libc-2.19.so [.] _int_free 0.68% libc-2.19.so [.] malloc 0.65% libc-2.19.so [.] __memmove_ssse3_back 0.55% libnux-core-4.0.so.0.7.0 [.] _ZN3nux18NThreadSafeCounter9In 0.52% libopengl.so [.] _ZN15PrivateGLScreen17paintOut Second monitor turned on in display settings (compiz jumps to 18%): 13.20% [kernel] [k] _nv013274rm 3.80% [kernel] [k] rm_check_pci_config_space 1.44% libc-2.19.so [.] _int_malloc 1.34% libc-2.19.so [.] _int_free 0.91% libc-2.19.so [.] malloc 0.82% libc-2.19.so [.] __memmove_ssse3_back 0.59% [kernel] [k] _nv008722rm 0.56% libopengl.so [.] _ZN15PrivateGLScreen17paintOut 0.55% libc-2.19.so [.] __GI___strcmp_ssse3 0.53% libnux-core-4.0.so.0.7.0 [.] _ZN3nux18NThreadSafeCounter9De Cheers, -- 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/1300393 Title: Connected external monitor causes very high cpu usage by compiz To manage notifications about this bug go to: https://bugs.launchpad.net/compiz/+bug/1300393/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~compiz Post to : compiz@lists.launchpad.net Unsubscribe : https://launchpad.net/~compiz More help : https://help.launchpad.net/ListHelp
