Re: #3 above: it no longer shows, though I have a variety of other error
messages, in case of interest (see below).

Thanks again.

$ chromium
update.go:85: cannot change mount namespace according to change mount 
(/var/lib/snapd/hostfs/usr/local/share/doc /usr/local/share/doc none bind,ro 0 
0): cannot open directory "/usr/local/share": permission denied
update.go:85: cannot change mount namespace according to change mount 
(/var/lib/snapd/hostfs/usr/share/sphinx_rtd_theme /usr/share/sphinx_rtd_theme 
none bind,ro 0 0): cannot open directory "/var/lib/snapd": permission denied
update.go:85: cannot change mount namespace according to change mount 
(/var/lib/snapd/hostfs/usr/share/xubuntu-docs /usr/share/xubuntu-docs none 
bind,ro 0 0): cannot open directory "/var/lib/snapd": permission denied
Gtk-Message: 10:11:21.053: Failed to load module "xapp-gtk3-module"
Gtk-Message: 10:11:21.053: Not loading module "atk-bridge": The functionality 
is provided by GTK natively. Please try to not load it.

(chrome:32339): Gtk-WARNING **: 10:11:21.146: GTK+ module 
/snap/chromium/2821/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so
 cannot be loaded.
GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not 
supported.
Gtk-Message: 10:11:21.146: Failed to load module "canberra-gtk-module"

(chrome:32339): Gtk-WARNING **: 10:11:21.147: GTK+ module 
/snap/chromium/2821/gnome-platform/usr/lib/gtk-2.0/modules/libcanberra-gtk-module.so
 cannot be loaded.
GTK+ 2.x symbols detected. Using GTK+ 2.x and GTK+ 3 in the same process is not 
supported.
Gtk-Message: 10:11:21.147: Failed to load module "canberra-gtk-module"
[32339:32339:0418/101121.220093:ERROR:policy_logger.cc(157)] 
:components/enterprise/browser/controller/chrome_browser_cloud_management_controller.cc(161)
 Cloud management controller initialization aborted as CBCM is not enabled. 
Please use the `--enable-chrome-browser-cloud-management` command line flag to 
enable it if you are not using the official Google Chrome build.

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You received this bug notification because you are a member of Desktop
Packages, which is subscribed to chromium-browser in Ubuntu.
https://bugs.launchpad.net/bugs/2062330

Title:
  Chromium fails to start with "invalid home directory"

Status in chromium-browser package in Ubuntu:
  New
Status in snapd package in Ubuntu:
  New

Bug description:
  As of this morning chromium failed to launch, a problem which I've
  never had before.

  When I run from command line, I get this:
  $ chromium
  ERROR: ld.so: object 'libgtk3-nocsd.so.0' from LD_PRELOAD cannot be preloaded 
(failed to map segment from shared object): ignored.
  cannot update snap namespace: cannot expand mount entry (none 
$HOME/.local/share none x-snapd.kind=ensure-dir,x-snapd.must-exist-dir=$HOME 0 
0): cannot use invalid home directory "/home/macho": permission denied
  snap-update-ns failed with code 1

  Here is some more info:

  $ ls -la /home | grep macho
  drwx------ 34 macho macho 12288 Apr 18 08:55 macho

  $ 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: 2 days ago, at 01:07 EDT
  channels:
    latest/stable:    123.0.6312.122 2024-04-15 (2821) 168MB -
    latest/candidate: 124.0.6367.60  2024-04-17 (2828) 169MB -
    latest/beta:      124.0.6367.60  2024-04-16 (2827) 169MB -
    latest/edge:      125.0.6420.3   2024-04-17 (2829) 170MB -
  installed:          123.0.6312.122            (2821) 168MB -

  $ dpkg -l libgtk3-nocsd0
  Desired=Unknown/Install/Remove/Purge/Hold
  | Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
  |/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
  ||/ Name                 Version      Architecture Description
  
+++-====================-============-============-============================>
  ii  libgtk3-nocsd0:amd64 3-1ubuntu2   amd64        Library to disable Gtk+ 3 
cl

  Happy to provide any further info needed. This is on ubuntu 23.10

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