[Desktop-packages] [Bug 1899184] Re: CPU spikes and system hangs from gnome-shell every 5-10 seconds

2020-10-12 Thread Radon Rosborough 
No extensions were installed aside from whatever came with Ubuntu by
default. Unfortunately, I can't provide the requested debugging
information at present since I've installed Kubuntu, which does not
exhibit the same problem. Hopefully somebody else with the same issue
can chime in, however.

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Title:
  CPU spikes and system hangs from gnome-shell every 5-10 seconds

Status in gnome-shell package in Ubuntu:
  Incomplete

Bug description:
  On a fresh installation of Ubuntu 20.04 with no configuration files
  changed yet (the "install third-party software" option enabled),
  installed from the official daily ISO, the system freezes for about a
  second every 5-10 seconds and I see a spike to 70% or more CPU usage
  by gnome-shell. I cannot see anything that shows up in `sudo
  journalctl -ef` or `sudo dmesg -w` when the freezes occur. The problem
  reproduces on both X11 and Wayland, although under Wayland it's more
  annoying since a freeze leads to repeated keypresses of whatever key
  was being held down on the keyboard at the time of the freeze.

  This problem seems to have been reported at
  

  but with no plausible resolution or workaround in sight.

  I tried to follow  to figure out what
  was going on with gnome-shell, but I don't think the results seem very
  helpful.

  Result of `sudo perf top`:

  4.39%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
  4.26%  libc-2.31.so [.] __vfprintf_internal

  And `sudo perf top --sort comm,dso`:

  45.28%  gnome-shell  libglib-2.0.so.0.6400.3
  17.23%  gnome-shell  libc-2.31.so

  And `sudo perf record -g -p PID` for the `gnome-shell` PID:

  +   39.81% 0.01%  [unknown][.] 

  +   14.26% 2.04%  libc-2.31.so [.] 
__vasprintf_internal
  +8.61% 8.42%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
  +8.51% 8.09%  libc-2.31.so [.] 
__vfprintf_internal

  And `strace -c -p PID`:

  % time seconds  usecs/call callserrors syscall
  -- --- --- - - 
   34.410.128602   5 22784 19837 recvmsg
   25.740.096215   7 13716   632 ioctl
   18.040.067420  10  6686   poll
    9.500.035523   7  4858   write
    4.560.017025   7  2322   writev

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: gnome-shell 3.36.4-1ubuntu1~20.04.2
  ProcVersionSignature: Ubuntu 5.4.0-49.53-generic 5.4.65
  Uname: Linux 5.4.0-49-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.10
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Oct  9 07:54:43 2020
  DisplayManager: gdm3
  InstallationDate: Installed on 2020-10-09 (0 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20201007)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=
   LANG=en_US.UTF-8
   SHELL=/usr/bin/zsh
  RelatedPackageVersions: mutter-common 3.36.6-1ubuntu0.20.04.2
  SourcePackage: gnome-shell
  UpgradeStatus: No upgrade log present (probably fresh install)

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[Desktop-packages] [Bug 1899184] [NEW] CPU spikes and system hangs from gnome-shell every 5-10 seconds

2020-10-09 Thread Radon Rosborough 
Public bug reported:

On a fresh installation of Ubuntu 20.04 with no configuration files
changed yet (the "install third-party software" option enabled),
installed from the official daily ISO, the system freezes for about a
second every 5-10 seconds and I see a spike to 70% or more CPU usage by
gnome-shell. I cannot see anything that shows up in `sudo journalctl
-ef` or `sudo dmesg -w` when the freezes occur. The problem reproduces
on both X11 and Wayland, although under Wayland it's more annoying since
a freeze leads to repeated keypresses of whatever key was being held
down on the keyboard at the time of the freeze.

This problem seems to have been reported at

but with no plausible resolution or workaround in sight.

I tried to follow  to figure out what
was going on with gnome-shell, but I don't think the results seem very
helpful.

Result of `sudo perf top`:

4.39%  libglib-2.0.so.0.6400.3  [.] g_variant_serialised_n_children
4.26%  libc-2.31.so [.] __vfprintf_internal

And `sudo perf top --sort comm,dso`:

45.28%  gnome-shell  libglib-2.0.so.0.6400.3
17.23%  gnome-shell  libc-2.31.so

And `sudo perf record -g -p PID` for the `gnome-shell` PID:

+   39.81% 0.01%  [unknown][.] 
+   14.26% 2.04%  libc-2.31.so [.] 
__vasprintf_internal
+8.61% 8.42%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
+8.51% 8.09%  libc-2.31.so [.] 
__vfprintf_internal

And `strace -c -p PID`:

% time seconds  usecs/call callserrors syscall
-- --- --- - - 
 34.410.128602   5 22784 19837 recvmsg
 25.740.096215   7 13716   632 ioctl
 18.040.067420  10  6686   poll
  9.500.035523   7  4858   write
  4.560.017025   7  2322   writev

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: gnome-shell 3.36.4-1ubuntu1~20.04.2
ProcVersionSignature: Ubuntu 5.4.0-49.53-generic 5.4.65
Uname: Linux 5.4.0-49-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.10
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Fri Oct  9 07:54:43 2020
DisplayManager: gdm3
InstallationDate: Installed on 2020-10-09 (0 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20201007)
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=
 LANG=en_US.UTF-8
 SHELL=/usr/bin/zsh
RelatedPackageVersions: mutter-common 3.36.6-1ubuntu0.20.04.2
SourcePackage: gnome-shell
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: gnome-shell (Ubuntu)
 Importance: Undecided
 Status: New


** Tags: amd64 apport-bug focal

** Description changed:

  On a fresh installation of Ubuntu 20.04 with no configuration files
  changed yet (the "install third-party software" option enabled),
  installed from the official daily ISO, the system freezes for about a
  second every 5-10 seconds and I see a spike to 70% or more CPU usage by
  gnome-shell. I cannot see anything that shows up in `sudo journalctl
  -ef` or `sudo dmesg -w` when the freezes occur. The problem reproduces
  on both X11 and Wayland, although under Wayland it's more annoying since
  a freeze leads to repeated keypresses of whatever key was being held
  down on the keyboard at the time of the freeze.
  
+ This problem seems to have been reported at
+ 

+ but with no plausible resolution or workaround in sight.
+ 
  I tried to follow  to figure out what
  was going on with gnome-shell, but I don't think the results seem very
  helpful.
  
  Result of `sudo perf top`:
  
- 4.39%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
- 4.26%  libc-2.31.so [.] __vfprintf_internal
+ 4.39%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
+ 4.26%  libc-2.31.so [.] __vfprintf_internal
  
  And `sudo perf top --sort comm,dso`:
  
- 45.28%  gnome-shell  libglib-2.0.so.0.6400.3
- 17.23%  gnome-shell  libc-2.31.so
+ 45.28%  gnome-shell  libglib-2.0.so.0.6400.3
+ 17.23%  gnome-shell  libc-2.31.so
  
  And `sudo perf record -g -p PID` for the `gnome-shell` PID:
  
- +   39.81% 0.01%  [unknown][.] 

- +   14.26% 2.04%  libc-2.31.so [.] 
__vasprintf_internal
- +8.61% 8.42%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
- +8.51% 8.09%  libc-2.31.so

[Desktop-packages] [Bug 1899184] Re: CPU spikes and system hangs from gnome-shell every 5-10 seconds

2020-10-09 Thread Radon Rosborough 
Reattached GsettingsChanges.txt since the apport version contained
private information.

** Attachment added: "GsettingsChanges.txt"
   
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1899184/+attachment/5419988/+files/GsettingsChanges.txt

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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/1899184

Title:
  CPU spikes and system hangs from gnome-shell every 5-10 seconds

Status in gnome-shell package in Ubuntu:
  New

Bug description:
  On a fresh installation of Ubuntu 20.04 with no configuration files
  changed yet (the "install third-party software" option enabled),
  installed from the official daily ISO, the system freezes for about a
  second every 5-10 seconds and I see a spike to 70% or more CPU usage
  by gnome-shell. I cannot see anything that shows up in `sudo
  journalctl -ef` or `sudo dmesg -w` when the freezes occur. The problem
  reproduces on both X11 and Wayland, although under Wayland it's more
  annoying since a freeze leads to repeated keypresses of whatever key
  was being held down on the keyboard at the time of the freeze.

  This problem seems to have been reported at
  

  but with no plausible resolution or workaround in sight.

  I tried to follow  to figure out what
  was going on with gnome-shell, but I don't think the results seem very
  helpful.

  Result of `sudo perf top`:

  4.39%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
  4.26%  libc-2.31.so [.] __vfprintf_internal

  And `sudo perf top --sort comm,dso`:

  45.28%  gnome-shell  libglib-2.0.so.0.6400.3
  17.23%  gnome-shell  libc-2.31.so

  And `sudo perf record -g -p PID` for the `gnome-shell` PID:

  +   39.81% 0.01%  [unknown][.] 

  +   14.26% 2.04%  libc-2.31.so [.] 
__vasprintf_internal
  +8.61% 8.42%  libglib-2.0.so.0.6400.3  [.] 
g_variant_serialised_n_children
  +8.51% 8.09%  libc-2.31.so [.] 
__vfprintf_internal

  And `strace -c -p PID`:

  % time seconds  usecs/call callserrors syscall
  -- --- --- - - 
   34.410.128602   5 22784 19837 recvmsg
   25.740.096215   7 13716   632 ioctl
   18.040.067420  10  6686   poll
    9.500.035523   7  4858   write
    4.560.017025   7  2322   writev

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: gnome-shell 3.36.4-1ubuntu1~20.04.2
  ProcVersionSignature: Ubuntu 5.4.0-49.53-generic 5.4.65
  Uname: Linux 5.4.0-49-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.10
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Oct  9 07:54:43 2020
  DisplayManager: gdm3
  InstallationDate: Installed on 2020-10-09 (0 days ago)
  InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20201007)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=
   LANG=en_US.UTF-8
   SHELL=/usr/bin/zsh
  RelatedPackageVersions: mutter-common 3.36.6-1ubuntu0.20.04.2
  SourcePackage: gnome-shell
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1899184/+subscriptions

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