Failed to start flatpak document portal service.

[Mathieu]

Bug desciption: when launching the Calendar app (flatpak version) my system freezes for 2/3 sec, then re-become responsive, then the calendar app launcher like 10 sec after.
All my flatpak apps boot a lot slower than usual.

This bug happened with the recent update to libxml2 (one or two days ago ?).
This is not the first time it happened. See:
https://github.com/flatpak/xdg-desktop-portal-gtk/issues/107#issuecomment-454653039

I don't know where to report this, if this is relates to ubuntu or to the flatpak project. Thanks for looking into this !

Description: Ubuntu 21.10
Release: 21.10

libxml2:
  Installed: 2.9.12+dfsg-4ubuntu0.1
  Candidate: 2.9.12+dfsg-4ubuntu0.1
  Version table:
 *** 2.9.12+dfsg-4ubuntu0.1 500
        500 http://archive.ubuntu.com/ubuntu impish-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu impish-security/main amd64 Packages
        100 /var/lib/dpkg/status
     2.9.12+dfsg-4 500
        500 http://archive.ubuntu.com/ubuntu impish/main amd64 Packages

flatpak:
  Installed: 1.10.2-3ubuntu0.1
  Candidate: 1.10.2-3ubuntu0.1
  Version table:
 *** 1.10.2-3ubuntu0.1 500
        500 http://archive.ubuntu.com/ubuntu impish-updates/universe amd64 Packages
        500 http://archive.ubuntu.com/ubuntu impish-security/universe amd64 Packages
        100 /var/lib/dpkg/status
     1.10.2-3 500
        500 http://archive.ubuntu.com/ubuntu impish/universe amd64 Packages

systemd:
  Installed: 248.3-1ubuntu8.2
  Candidate: 248.3-1ubuntu8.2
  Version table:
 *** 248.3-1ubuntu8.2 500
        500 http://archive.ubuntu.com/ubuntu impish-updates/main amd64 Packages
        500 http://archive.ubuntu.com/ubuntu impish-security/main amd64 Packages
        100 /var/lib/dpkg/status
     248.3-1ubuntu8 500
        500 http://archive.ubuntu.com/ubuntu impish/main amd64 Packages

journalctl -e:
mars 15 11:25:09 mathieu-ThinkPad systemd[3226]: app-gnome-gufw-20889.scope: Deactivated successfully.
mars 15 11:25:13 mathieu-ThinkPad systemd[1]: systemd-timedated.service: Deactivated successfully.
mars 15 11:25:13 mathieu-ThinkPad dbus-daemon[6461]: [session uid=1000 pid=6461] Activating via systemd: service name='org.freedesktop.port>
mars 15 11:25:13 mathieu-ThinkPad systemd[3226]: Starting flatpak document portal service...
mars 15 11:25:14 mathieu-ThinkPad xdg-document-portal[21187]: error: Failed to load db from '/home/mathieu/.local/share/flatpak/db/document>
mars 15 11:25:14 mathieu-ThinkPad systemd[3226]: xdg-document-portal.service: Main process exited, code=exited, status=2/INVALIDARGUMENT
mars 15 11:25:14 mathieu-ThinkPad systemd[3226]: xdg-document-portal.service: Failed with result 'exit-code'.
mars 15 11:25:14 mathieu-ThinkPad systemd[3226]: Failed to start flatpak document portal service.

sudo dmesg:
[ 2380.432314] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 2380.445853] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 2380.449934] Lockdown: systemd-logind: hibernation is restricted; see man kernel_lockdown.7
[ 2513.367108] gnome-calendar[9096]: segfault at 400000016 ip 00007f8e926037a0 sp 00007ffe96506ca8 error 4 in libgobject-2.0.so.0.7000.4[7f8e925db000+31000]
[ 2513.367127] Code: ff fc 03 00 00 77 33 48 c1 ef 02 48 8d 05 b8 4b 02 00 48 8b 3c f8 48 81 fe fc 03 00 00 76 28 48 83 e6 fc 31 c0 48 85 ff 74 33 <f6> 47 16 04 74 05 48 85 f6 75 2d 31 c0 c3 66 90 48 83 e7 fc 48 81
[ 2739.248107] [UFW BLOCK] IN=wlp3s0 OUT= MAC=a8:6d:aa:ef:af:b5:be:0d:fd:89:d3:3b:08:00 SRC=142.250.200.129 DST=192.168.43.18 LEN=40 TOS=0x00 PREC=0x00 TTL=116 ID=0 DF PROTO=TCP SPT=443 DPT=56418 WINDOW=0 RES=0x00 RST URGP=0
[ 4484.828195] gnome-calendar[20663]: segfault at 400000016 ip 00007f4c418207a0 sp 00007ffc815aff58 error 4 in libgobject-2.0.so.0.7000.4[7f4c417f8000+31000]
[ 4484.828209] Code: ff fc 03 00 00 77 33 48 c1 ef 02 48 8d 05 b8 4b 02 00 48 8b 3c f8 48 81 fe fc 03 00 00 76 28 48 83 e6 fc 31 c0 48 85 ff 74 33 <f6> 47 16 04 74 05 48 85 f6 75 2d 31 c0 c3 66 90 48 83 e7 fc 48 81

ProblemType: Bug
DistroRelease: Ubuntu 21.10
Package: systemd 248.3-1ubuntu8.2
ProcVersionSignature: Ubuntu 5.13.0-35.40-generic 5.13.19
Uname: Linux 5.13.0-35-generic x86_64
ApportVersion: 2.20.11-0ubuntu71
Architecture: amd64
CasperMD5CheckResult: unknown
CurrentDesktop: ubuntu:GNOME
Date: Tue Mar 15 11:28:05 2022
MachineType: LENOVO 20BXCTO1WW
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.13.0-35-generic root=UUID=cd963331-afa1-4933-8bc2-5e53bb0b1c24 ro quiet splash vt.handoff=7
SourcePackage: systemd
SystemdFailedUnits:
 Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use systemd-escape?).
 Unit \xe2\x97\x8f.service could not be found.
 ------
 Error: command ['systemctl', 'status', '--full', '●'] failed with exit code 4: Invalid unit name "●" escaped as "\xe2\x97\x8f" (maybe you should use systemd-escape?).
 Unit \xe2\x97\x8f.service could not be found.
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 08/14/2019
dmi.bios.release: 1.37
dmi.bios.vendor: LENOVO
dmi.bios.version: JBET73WW (1.37 )
dmi.board.asset.tag: Not Available
dmi.board.name: 20BXCTO1WW
dmi.board.vendor: LENOVO
dmi.board.version: SDK0E50512 STD
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: None
dmi.ec.firmware.release: 1.4
dmi.modalias: dmi:bvnLENOVO:bvrJBET73WW(1.37):bd08/14/2019:br1.37:efr1.4:svnLENOVO:pn20BXCTO1WW:pvrThinkPadT450s:rvnLENOVO:rn20BXCTO1WW:rvrSDK0E50512STD:cvnLENOVO:ct10:cvrNone:skuLENOVO_MT_20BX_BU_Think_FM_ThinkPadT450s:
dmi.product.family: ThinkPad T450s
dmi.product.name: 20BXCTO1WW
dmi.product.sku: LENOVO_MT_20BX_BU_Think_FM_ThinkPad T450s
dmi.product.version: ThinkPad T450s
dmi.sys.vendor: LENOVO

[Mathieu (mbousq)]

I found the culprit, being a 0 byte "documents" file in the flatpak database. I filed an issue in the flatpak github.

https://github.com/flatpak/xdg-desktop-portal/issues/369#issuecomment-1068915444

I still don't know if this relates to libxml2, and if it is worth being investigated how that 0 byte file was created. Thanks for reading.

[Sebastien Bacher (seb128)]

Thanks for reporting it upstream!