file browser hangs system for several seconds on save/load/exit

[Christopher Barrington-Leigh]

For the last month, saving a file or printing a file from my browser or any other application, or even trying to quit the file browser without doing anything, causes the file dialog and the entire system to hang (become unresponsive) for several seconds.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: nautilus 1:3.32.1-0ubuntu0.19.04.0
ProcVersionSignature: Ubuntu 5.0.0-20.21-generic 5.0.8
Uname: Linux 5.0.0-20-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Jul 27 05:53:20 2019
EcryptfsInUse: Yes
InstallationDate: Installed on 2019-01-24 (183 days ago)
InstallationMedia: Ubuntu 18.10 "Cosmic Cuttlefish" - Release amd64 (20181017.3)
SourcePackage: nautilus
UpgradeStatus: Upgraded to disco on 2019-05-29 (58 days ago)
usr_lib_nautilus: dropbox 2018.11.28

[Sebastien Bacher (seb128)]

Thank you for your bug report. That's not specific to nautilus then?
Could you add your 'journalctl -b 0' log after getting the issue?

[Christopher Barrington-Leigh (cpbl)]

Sorry, I suspect it's specific to whatever part of the OS supplies dialogues to save files, but I'm not sophisticated enough to know what that means.
Here's the journal:

Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: [1:14:0808/145734.092083:ERROR:data_channel.cc(44)] Accepting maxRetransmits = -1 for backwards compatibility
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: [1:14:0808/145734.092197:ERROR:data_channel.cc(49)] Accepting maxRetransmitTime = -1 for backwards compatibility
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: [1:1:0808/145734.297061:ERROR:webrtc_sdp.cc(412)] Failed to parse: "a=msid: ". Reason: Missing track ID in msid attribute.
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: [1:1:0808/145734.297423:ERROR:webrtc_sdp.cc(412)] Failed to parse: "a=msid: ". Reason: Missing track ID in msid attribute.
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: [1:1:0808/145734.297582:ERROR:webrtc_sdp.cc(412)] Failed to parse: "a=msid: ". Reason: Missing track ID in msid attribute.
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: [1:1:0808/145734.297750:ERROR:webrtc_sdp.cc(412)] Failed to parse: "a=msid: ". Reason: Missing track ID in msid attribute.
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: [1:1:0808/145734.297838:ERROR:rtc_peer_connection_handler.cc(2296)] Failed to create native session description. Type: offer SDP: v=0
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: o=- 7056755024856063948 2 IN IP4 127.0.0.1
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: s=-
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: t=0 0
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=group:BUNDLE 0
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=msid-semantic: WMS
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: m=application 9 UDP/TLS/RTP/SAVPF 119
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: c=IN IP4 0.0.0.0
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: b=AS:30
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=rtcp:9 IN IP4 0.0.0.0
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=ice-ufrag:XXX
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=ice-pwd:XXX
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=ice-options:trickle
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=fingerprint:sha-256 XXX
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=setup:actpass
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=mid:0
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=sendrecv
Aug 08 14:57:34 T450s-high org.gnome.SettingsDaemon.MediaKeys.desktop[2678]: a=msid:
Aug 08 14:57:34 T450s-high org....

[Christopher Barrington-Leigh (cpbl)]

Un-locking the screen/desktop now also takes much longer than it used to. After correctly entering the password or scanning a fingerprint, nothing happens for a long time, and then eventually the screen is unlocked. Could that be related?

[Christopher Barrington-Leigh (cpbl)]

@seb128, I added the log when you asked. This bug affects all file saves / loads on all applications on Ubuntu, so it is very debilitating. Can't imagine why there are no other complainants.