OK. Opera démarre en ligne de commande avec mes réglages précédents. Voilà le retour:
Inspiron-15-3573:~/Téléchargements$ opera
[6938:6938:0120/071036.562031:ERROR:sandbox_linux.cc(374)] InitializeSandbox() called with multiple threads in process gpu-process.
[6911:6911:0120/071046.002490:ERROR:CONSOLE(1928)] "Uncaught (in promise) [object Object]", source: chrome://op-resources/toolkit/toolkit-0.69.0.js (1928)
[6911:6911:0120/071047.284018:ERROR:flow_session.cc(554)] Flow client is Unauthorized. Reset.
[6911:6922:0120/071700.778934:ERROR:connection_factory_impl.cc(428)] Failed to connect to MCS endpoint with error -106
[6911:6922:0120/071711.276391:ERROR:connection_factory_impl.cc(428)] Failed to connect to MCS endpoint with error -105
[6940:6944:0120/071712.393088:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071712.399135:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071713.144386:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071713.300208:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071714.252122:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071714.364869:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071714.481728:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6911:6922:0120/071714.482179:ERROR:connection_factory_impl.cc(428)] Failed to connect to MCS endpoint with error -105
[6940:6944:0120/071714.583042:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071714.721977:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071716.714330:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071716.944761:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071719.494378:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071719.802736:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071724.308417:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071724.520711:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071730.784609:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[6940:6944:0120/071731.136406:ERROR:ssl_client_socket_impl.cc(960)] handshake failed; returned -1, SSL error code 1, net_error -200
[7715:18:0120/072026.444903:ERROR:batching_media_log.cc(38)] MediaEvent: {"error":"FFmpegDemuxer: no supported streams"}
[7715:1:0120/072026.445303:ERROR:batching_media_log.cc(35)] MediaEvent: {"pipeline_error":14}
Fontconfig error: Cannot load default config file: No such file: (null)
Inspiron-15-3573:~/Téléchargements$