Same problem here, running Ubuntu 18.04 on a Dell XP 9570 with a screen resolution of 3840x2160.
I am also seeing a lot of errors in recvmsg: strace: Process 1312 attached ^Cstrace: Process 1312 detached % time seconds usecs/call calls errors syscall ------ ----------- ----------- --------- --------- ---------------- 75.95 0.065664 2 26665 clock_gettime 8.38 0.007247 6 1238 1125 recvmsg 4.08 0.003530 9 410 poll 3.18 0.002747 3 802 getpid 2.09 0.001808 10 189 writev 1.81 0.001566 11 140 124 stat 1.21 0.001048 7 142 1 futex 1.15 0.000997 2 510 sched_yield 0.79 0.000686 4 162 write 0.66 0.000568 4 132 read 0.40 0.000348 3 106 mprotect 0.12 0.000106 8 13 nanosleep 0.06 0.000051 6 9 mmap 0.04 0.000034 11 3 openat 0.03 0.000023 4 6 fstat 0.02 0.000014 5 3 close 0.01 0.000010 3 3 fcntl 0.01 0.000009 1 8 getrusage 0.00 0.000000 0 1 restart_syscall ------ ----------- ----------- --------- --------- ---------------- 100.00 0.086456 30542 1250 total -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-shell in Ubuntu. https://bugs.launchpad.net/bugs/1773959 Title: High CPU usage by gnome-shell when only running gnome-terminal Status in gnome-shell package in Ubuntu: Confirmed Bug description: Even when doing nothing but displaying a terminal screen with top running gnome-shell uses 10% of a CPU. That seems excessive. I disabled all extensions to try and make the test fair. Enabling the system monitor extension increases the load to 13-14%. It seems that the gnome-shell screen painting is highly CPU consuming even if screen updates are infrequent (1 a second for all these cases). ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gnome-shell 3.28.1-0ubuntu2 ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17 Uname: Linux 4.15.0-20-generic x86_64 ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Tue May 29 11:38:05 2018 DisplayManager: gdm3 InstallationDate: Installed on 2016-10-27 (578 days ago) InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719) SourcePackage: gnome-shell UpgradeStatus: Upgraded to bionic on 2018-05-19 (9 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1773959/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
