Since the snap upgrade to 80.0.3987.132, chromium keeps complaining about I/O errors that are apparently due to missing Apparmor rules. Here is what gets logged by "journalctl -f -o cat" when starting and closing chromium:
AVC apparmor="DENIED" operation="unlink" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F4C6173742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="d" denied_mask="d" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="rename_src" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wd" denied_mask="wd" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509664.429:3450): apparmor="DENIED" operation="unlink" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F4C6173742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="d" denied_mask="d" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509664.429:3451): apparmor="DENIED" operation="rename_src" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wd" denied_mask="wd" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F4C6173742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="unlink" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="d" denied_mask="d" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509664.433:3452): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F4C6173742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509664.433:3453): apparmor="DENIED" operation="unlink" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="d" denied_mask="d" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509664.433:3454): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
[6794:6794:0306/104744.442966:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6794:0306/104744.443908:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6794:0306/104744.444452:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
Opening in existing browser session.
AVC apparmor="DENIED" operation="truncate" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/History-journal" pid=6794 comm="Chrome_HistoryT" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000
[6794:6937:0306/104744.470760:ERROR:database.cc(1584)] History sqlite error 1546, errno 0: disk I/O error, sql: SELECT segment_id, time_slot, visit_count FROM segment_usage WHERE time_slot >= ? ORDER BY segment_id
audit: type=1400 audit(1583509664.465:3455): apparmor="DENIED" operation="truncate" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/History-journal" pid=6794 comm="Chrome_HistoryT" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000
[6794:6794:0306/104744.492608:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6794:0306/104744.493281:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6794:0306/104744.494319:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6794:0306/104744.553178:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6794:0306/104744.553388:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
gdk_pixbuf_get_width: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6794:0306/104744.553578:ERROR:browser_main_loop.cc(277)] Gtk: gtk_icon_info_load_symbolic_for_context: assertion 'icon_info != NULL' failed
gdk_pixbuf_get_height: assertion 'GDK_IS_PIXBUF (pixbuf)' failed
[6794:6937:0306/104744.808572:ERROR:database.cc(1584)] Thumbnail sqlite error 778, errno 0: disk I/O error, sql: UPDATE favicon_bitmaps SET last_updated=?, last_requested=? WHERE id=?
[6794:6937:0306/104744.810129:ERROR:database.cc(1584)] Thumbnail sqlite error 778, errno 0: disk I/O error, sql: UPDATE favicon_bitmaps SET last_updated=?, last_requested=? WHERE id=?
AVC apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509666.945:3456): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="truncate" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/History-journal" pid=6794 comm="Chrome_HistoryT" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000
[6794:6937:0306/104753.555124:ERROR:database.cc(1584)] History sqlite error 1546, errno 0: disk I/O error, sql: SELECT id,url,visit_time,from_visit,transition,segment_id,visit_duration,incremented_omnibox_typed_score FROM visits WHERE id=?
audit: type=1400 audit(1583509673.549:3457): apparmor="DENIED" operation="truncate" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/History-journal" pid=6794 comm="Chrome_HistoryT" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="mknod" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/.org.chromium.Chromium.GhH4aA" pid=6794 comm="ThreadPoolForeg" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509674.441:3458): apparmor="DENIED" operation="mknod" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/.org.chromium.Chromium.GhH4aA" pid=6794 comm="ThreadPoolForeg" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="mknod" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/.org.chromium.Chromium.x7rVyj" pid=6794 comm="ThreadPoolForeg" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
AVC apparmor="DENIED" operation="mknod" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/.org.chromium.Chromium.vaqYEJ" pid=6941 comm="ThreadPoolForeg" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509674.521:3459): apparmor="DENIED" operation="mknod" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/.org.chromium.Chromium.x7rVyj" pid=6794 comm="ThreadPoolForeg" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509674.521:3460): apparmor="DENIED" operation="mknod" profile="snap.chromium.chromium" name="/home/sdeziel/snap/chromium/1040/.config/chromium/Default/.org.chromium.Chromium.vaqYEJ" pid=6941 comm="ThreadPoolForeg" requested_mask="c" denied_mask="c" fsuid=1000 ouid=1000
[6794:6937:0306/104754.810597:ERROR:database.cc(1584)] History sqlite error 1, errno 0: cannot commit - no transaction is active, sql: COMMIT
[6794:6937:0306/104754.811356:ERROR:database.cc(1584)] Thumbnail sqlite error 1, errno 0: cannot commit - no transaction is active, sql: COMMIT
AVC apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
audit: type=1400 audit(1583509675.021:3461): apparmor="DENIED" operation="open" profile="snap.chromium.chromium" name=2F686F6D652F7364657A69656C2F736E61702F6368726F6D69756D2F313034302F2E636F6E6669672F6368726F6D69756D2F44656661756C742F43757272656E742053657373696F6E pid=6794 comm="ThreadPoolForeg" requested_mask="wc" denied_mask="wc" fsuid=1000 ouid=1000
Additional information:
$ lsb_release -rd
Description: Ubuntu 18.04.4 LTS
Release: 18.04
$ uname -a
Linux simon-lemur 5.3.0-40-generic #32~18.04.1-Ubuntu SMP Mon Feb 3 14:05:59 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
$ snap info chromium
name: chromium
summary: Chromium web browser, open-source version of Chrome
publisher: Canonical✓
store-url: https://snapcraft.io/chromium
contact: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bugs?field.tag=snap
license: unset
description: |
An open-source browser project that aims to build a safer, faster, and more stable way for all
Internet users to experience the web.
commands:
- chromium.chromedriver
- chromium
snap-id: XKEcBqPM06H1Z7zGOdG5fbICuf8NWK5R
tracking: latest/stable
refresh-date: yesterday at 15:55 EST
channels:
stable: 80.0.3987.132 2020-03-05 (1043) 160MB -
candidate: 80.0.3987.132 2020-03-04 (1043) 160MB -
beta: 81.0.4044.43 2020-03-05 (1045) 161MB -
edge: 81.0.4044.17 2020-02-14 (1028) 161MB -
installed: 80.0.3987.132 (1043) 160MB -
It appears that the snap was updated while chromium was running, which messed up with the profile directory (revision 1040 mentioned in the logs is for version 80.0.3987.122). This is a known problem (bug #1616650), so I'm marking as a duplicate.
I strongly suggest you enable app refresh awareness¹ to avoid this in the future:
snap set core experimental.
¹ https:/