qt.accessibility.atspi: Error in contacting registry: "org.freedesktop.DBus.Error.NameHasNoOwner" "Could not activate remote peer 'org.a11y.atspi.Registry': unit failed"

[jean-christophe-manciot]

Describe the problem, feature or ask a question:

This issue happens for all snapshots:

...
DEBUG: [qt/icon.py:20 <module>] Checking if the current theme contains the BiT icon...
DEBUG: [qt/icon.py:36 <module>] Probing theme: ubuntu-mono-dark (activated as ubuntu-mono-dark)
DEBUG: [qt/icon.py:32 <module>] Found an installed theme: ubuntu-mono-dark
qt.accessibility.atspi: Error in contacting registry: "org.freedesktop.DBus.Error.NameHasNoOwner" "Could not activate remote peer 'org.a11y.atspi.Registry': unit failed"
DEBUG: [common/snapshots.py:883 Snapshots.backup] Command "rsync --recursiv" returns 0
INFO: [common/snapshots.py:1079 Snapshots.backupConfig] Save config file
INFO: [common/snapshots.py:1160 Snapshots.backupPermissions] Save permissions
...

It does not prevent the snapshots from completing successfully though.

# backintime --diagnostics
{
    "backintime": {
        "name": "Back In Time",
        "version": "1.5.3",
        "running-as-root": false,
        "latest-config-version": 6,
        "local-config-file": "/root/.config/backintime/config",
        "local-config-file-found": true,
        "global-config-file": "/etc/backintime/config",
        "global-config-file-found": false,
        "started-from": "/usr/share/backintime/common",
        "user-callback": "/root/.config/backintime/user-callback",
        "keyring-supported": false
    },
    "host-setup": {
        "OS": {
            "/etc/os-release": "Ubuntu 24.10",
            "/etc/lsb-release": "DISTRIB_ID=Ubuntu\nDISTRIB_RELEASE=24.10\nDISTRIB_CODENAME=oracular\nDISTRIB_DESCRIPTION=\"Ubuntu 24.10\"\n",
            "/etc/debian_version": "trixie/sid\n"
        },
        "platform": "Linux-6.12.0-12-generic-x86_64-with-glibc2.40",
        "system": "Linux #12-Ubuntu SMP PREEMPT_DYNAMIC Wed Jan 22 16:36:37 UTC 2025",
        "display-system": "($XDG_SESSION_TYPE not set)",
        "locale": "en_US, UTF-8",
        "PATH": "/usr/lib/go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin",
        "RSYNC_OLD_ARGS": "(not set)",
        "RSYNC_PROTECT_ARGS": "(not set)"
    },
    "python-setup": {
        "python": "3.12.7 main Jan 17 2025 16:55:27 CPython GCC 14.2.0",
        "python-executable": "/usr/bin/python3",
        "python-executable-symlink": true,
        "python-executable-resolved": "/usr/bin/python3.12",
        "sys.path": [
            "/usr/share/backintime/qt/plugins",
            "/usr/share/backintime/common/plugins",
            "/usr/share/backintime/plugins",
            "/usr/share/backintime/common",
            "/usr/lib/python312.zip",
            "/usr/lib/python3.12",
            "/usr/lib/python3.12/lib-dynload",
            "/usr/local/lib/python3.12/dist-packages",
            "/usr/lib/python3/dist-packages",
            "/usr/lib/python3.12/dist-packages"
        ],
        "qt": {
            "Version": "PyQt 6.7.1 / Qt 6.6.2",
            "Theme": "hicolor",
            "Theme Search Paths": [
                "/root/.local/share/icons",
                "/usr/local/share/icons",
                "/usr/share/icons",
                ":/icons"
            ],
            "Fallback Theme": "hicolor",
            "Fallback Search Paths": [
                "/usr/share/pixmaps"
            ]
        }
    },
    "external-programs": {
        "rsync": {
            "version": "3.3.0",
            "protocol": "31.0",
            "capabilities": "file_bits: 64; inum_bits: 64; timestamp_bits: 64; long_int_bits: 64; socketpairs: True; symlinks: True; symtimes: True; hardlinks: True; hardlink_specials: True; hardlink_symlinks: True; IPv6: False; atimes: True; batchfiles: True; inplace: True; append: True; ACLs: True; xattrs: True; secluded_args: optional; iconv: True; prealloc: True; stop_at: True; crtimes: False",
            "optimizations": "SIMD_roll: True; asm_roll: False; openssl_crypto: True; asm_MD5: False",
            "checksum_list": "xxh128, xxh3, xxh64, md5, md4, sha1, none",
            "compress_list": "zstd, lz4, zlibx, zlib, none",
            "daemon_auth_list": "sha512, sha256, sha1, md5, md4"
        },
        "ssh": "OpenSSH_9.9p1 Ubuntu-3ubuntu2, OpenSSL 3.4.0 22 Oct 2024",
        "sshfs": "3.7.3",
        "encfs": "(no encfs)",
        "shell": "/bin/bash",
        "shell-version": "GNU bash, version 5.2.32(1)-release (x86_64-pc-linux-gnu)"
    }
}

[buhtz]

Hello Jean,

Thank you for taking the time to report the issue and providing the details. I appreciate your feedback.

I am assuming this is not related to BIT.

How do you start BIT in this cases where this error appears?

If you have any more details to share, feel free to reach out.

Best regards,
Christian

[jean-christophe-manciot]

How do you start BIT in this cases where this error appears?

/usr/bin/nice -n 19 /usr/bin/ionice -c2 -n7 /usr/bin/backintime --debug --profile "$profile_name" backup

[buhtz]

Beside that error output itself I don't see that the backup job itself is somehow interrupted.

How do you start BIT in this cases where this error appears?

/usr/bin/nice -n 19 /usr/bin/ionice -c2 -n7 /usr/bin/backintime --debug --profile "$profile_name" backup

Looks like a crontab line. Can you reproduce the error output with exactly that line in a shell?

Can you also reproduce the error output when you start backintime-qt in terminal?

I just can tell that backintime has no Qt related dependency but try to use Qt in qt_probing.py just because of debug reasons. So I am assuming that Qt is somehow activated around this code.

But I still assume this is not BIT related but Qt. I recommend to ask the Ubuntu and Qt community.

If this error is restricted to the cron environment only, than I assume that the accessibility components are somehow not active or available to Qt when running via cron.

[jean-christophe-manciot]

Looks like a crontab line. Can you reproduce the error output with exactly that line in a shell?

Can you also reproduce the error output when you start backintime-qt in terminal?

I wasn't clear enough. This error pops up only when I run the above command from CLI (bash); when it is automatically activated from crontab, there is no such error.

[buhtz]

Interesting. I really have no idea. Let me know if get some more info from somewhere else about it.

[buhtz]

I do prepare have a release candidate targeting 1.6.01.5.4. Let's see if someone else also got this error.