Link new device by QR code is not working

[Artiom-M]

Description

I have enabled login_via_existing_session and even installed matrix_http_rendezvous_synapse.SynapseRendezvousModule but still see

QR code not supported
Your account provider doesn't support signing into a new device with a QR code.

Steps to reproduce

On Synapse desktop

• click on avatar -> Link new device
• shows Settings: Sessions configuration screen with : QR code not supported
  Your account provider doesn't support signing into a new device with a QR code.

Homeserver

Personal home server

Synapse Version

{"versions":["r0.0.1","r0.1.0","r0.2.0","r0.3.0","r0.4.0","r0.5.0","r0.6.0","r0.6.1","v1.1","v1.2","v1.3","v1.4","v1.5","v1.6","v1.7","v1.8","v1.9","v1.10","v1.11"],"unstable_features":{"org.matrix.label_based_filtering":true,"org.matrix.e2e_cross_signing":true,"org.matrix.msc2432":true,"uk.half-shot.msc2666.query_mutual_rooms":true,"io.element.e2ee_forced.public":false,"io.element.e2ee_forced.private":false,"io.element.e2ee_forced.trusted_private":false,"org.matrix.msc3026.busy_presence":false,"org.matrix.msc2285.stable":true,"org.matrix.msc3827.stable":true,"org.matrix.msc3440.stable":true,"org.matrix.msc3771":true,"org.matrix.msc3773":false,"fi.mau.msc2815":false,"fi.mau.msc2659.stable":true,"org.matrix.msc3882":true,"org.matrix.msc3881":false,"org.matrix.msc3874":false,"org.matrix.msc3912":false,"org.matrix.msc3981":true,"org.matrix.msc3391":false,"org.matrix.msc4069":false,"org.matrix.msc4028":false,"org.matrix.msc4108":false,"org.matrix.msc4140":false,"org.matrix.msc4151":false,"org.matrix.simplified_msc3575":true}}

Installation Method

pip (from PyPI)

Database

postgres

Workers

Single process

Platform

Oracle enterprise Linux 8 (VPS)

Configuration

Options I have configured for link new device:

modules:
  - module: matrix_http_rendezvous_synapse.SynapseRendezvousModule
    config:
      prefix: /_synapse/client/org.matrix.msc3886/rendezvouz
experimental_features:
  msc3886_enabled: true
  msc3886_endpoint: /_synapse/client/org.matrix.msc3886/rendezvous

login_via_existing_session:
    enabled: true
    require_ui_auth: false
    token_timeout: "5m"

Relevant log output

I don't see anything special in the log when selecting the QR page...


Dec 11 11:19:22 server synapse[403003]: root: [main] ***** STARTING SERVER *****
Dec 11 11:19:22 server synapse[403003]: root: [main] Server /home/matrix/synapse/venv/lib64/python3.11/site-packages/synapse/app/homeserver.py version 1.120.2
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,241 - root - 353 - WARNING - main - Server /home/matrix/synapse/venv/lib64/python3.11/site-packages/synapse/app/homeserver.py version 1.120.2
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,241 - root - 358 - WARNING - main - Copyright (c) 2023 New Vector, Inc
Dec 11 11:19:22 server synapse[403003]: root: [main] Copyright (c) 2023 New Vector, Inc
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,241 - root - 359 - WARNING - main - Licensed under the AGPL 3.0 license. Website: https://github.com/element-hq/synapse
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,242 - root - 362 - INFO - main - Server hostname: xxx
Dec 11 11:19:22 server synapse[403003]: root: [main] Licensed under the AGPL 3.0 license. Website: https://github.com/element-hq/synapse
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,242 - root - 363 - INFO - main - Instance name: master
Dec 11 11:19:22 server synapse[403003]: root: [main] Server hostname: vega-forum.club
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,242 - root - 364 - INFO - main - Twisted reactor: AsyncioSelectorReactor
Dec 11 11:19:22 server synapse[403003]: root: [main] Instance name: master
Dec 11 11:19:22 server synapse[403003]: root: [main] Twisted reactor: AsyncioSelectorReactor
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,721 - twisted - 279 - INFO - main - Redirected stdout/stderr to logs
Dec 11 11:19:22 server synapse[403003]: twisted: [main] Redirected stdout/stderr to logs
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,745 - matrix_http_rendezvous_synapse - 65 - INFO - sentinel - Mounting rendez-vous server on /_synapse/client/org.matrix.msc3886/rendezvouz, w>
Dec 11 11:19:22 server synapse[403003]: matrix_http_rendezvous_synapse: [sentinel] Mounting rendez-vous server on /_synapse/client/org.matrix.msc3886/rendezvouz, with a TTL of 1m and max payload size of 4.0 kiB
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,764 - twisted - 279 - INFO - sentinel - SynapseSite starting on 18448
Dec 11 11:19:22 server synapse[403003]: twisted: [sentinel] SynapseSite starting on 18448
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,765 - twisted - 279 - INFO - sentinel - SynapseSite starting on 18448
Dec 11 11:19:22 server synapse[403003]: twisted: [sentinel] SynapseSite starting on 18448
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,782 - twisted - 279 - INFO - sentinel - SynapseSite starting on 8008
Dec 11 11:19:22 server synapse[403003]: twisted: [sentinel] SynapseSite starting on 8008
Dec 11 11:19:22 server matrix-synapse[403003]: 2024-12-11 11:19:22,783 - twisted - 279 - INFO - sentinel - SynapseSite starting on 8008
Dec 11 11:19:22 server synapse[403003]: twisted: [sentinel] SynapseSite starting on 8008
Dec 11 11:19:22 server systemd[1]: Started Synapse Matrix homeserver.

### Anything else that would be useful to know?

_No response_