[Linux-bruxelles] Steam ne se charge plus après un upgrade de Mint 18.3 vers 19.3

[quatron]

Bonjour a tous,

Linux n'a qu'un virus: les programmeurs qui font des upgrade.

Le sujet est dans le titre.

J'ai tout désinstallé (avec purge des fichiers) tout réinstallé avec le 
méta paquet de apt puis en direct avec le .deb de steam  mais ça ne 
fonctionne plus.
J'ai cherché sur steam: renseignements datant de Ubuntu 12 et lien 
brisés (dépôt non signé).

L'un de vous a peut-être une idée...

EN lançant steam dans une console on obtient:

micpaq at Ordi-Bureau ~ $ steam
Running Steam on linuxmint 19.3 64-bit
STEAM_RUNTIME is enabled automatically
Pins up-to-date!
Steam client's requirements are satisfied
/home/micpaq/.steam/ubuntu12_32/steam
[2020-07-14 16:59:22] Startup - updater built Jul  8 2020 23:10:46
Installing breakpad exception handler for appid(steam)/version(1594252496)
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
SteamUpdateUI: An X Error occurred
X Error of failed request:  GLXBadContext
SteamUpdateUI: An X Error occurred
X Error of failed request:  BadValue (integer parameter out of range for 
operation)
Major opcode of failed request:  154 (GLX)
Minor opcode of failed request:  3 (X_GLXCreateContext)
Value in failed request:  0x0
Serial number of failed request:  45
xerror_handler: X failed, continuing
Major opcode of failed request:  154 (GLX)
Minor opcode of failed request:  6 (X_GLXIsDirect)
Serial number of failed request:  46
xerror_handler: X failed, continuing
Looks like steam didn't shutdown cleanly, scheduling immediate update check
Installing breakpad exception handler for appid(steam)/version(1594252496)
[2020-07-14 16:59:23] Checking for update on startup
[2020-07-14 16:59:23] Recherche de nouvelles mises à jour...
[2020-07-14 16:59:23] Downloading manifest: 
client-download.steampowered.com/client/steam_client_ubuntu12
Installing breakpad exception handler for appid(steam)/version(1594252496)
[2020-07-14 16:59:23] Download skipped: /client/steam_client_ubuntu12 
version 1594252496, installed version 1594252496
[2020-07-14 16:59:23] Nothing to do
[2020-07-14 16:59:23] Vérification de l'installation...
[2020-07-14 16:59:23] Performing checksum verification of executable files
[2020-07-14 16:59:30] Verification complete
Loaded SDL version 2.0.13-5893924
Gtk-Message: 16:59:31.260: Failed to load module "gail"
Gtk-Message: 16:59:31.261: Failed to load module "atk-bridge"
libGL error: No matching fbConfigs or visuals found
libGL error: failed to load driver: swrast
Steam: An X Error occurred
X Error of failed request:  GLXBadContext
Major opcode of failed request:  154
Serial number of failed request:  49
xerror_handler: X failed, continuing
Steam: An X Error occurred
X Error of failed request:  BadValue (integer parameter out of range for 
operation)
Major opcode of failed request:  154
Value in failed request:  0x0
Serial number of failed request:  48
xerror_handler: X failed, continuing
Steam: An X Error occurred
X Error of failed request:  BadMatch (invalid parameter attributes)
Major opcode of failed request:  154
Serial number of failed request:  50
xerror_handler: X failed, continuing
assert_20200714165922_1.dmp[9549]: Uploading dump (out-of-process)
/tmp/dumps/assert_20200714165922_1.dmp
/home/micpaq/.steam/steam.sh : ligne 750 :  9525 Erreur de segmentation 
(core dumped) $STEAM_DEBUGGER "$STEAMROOT/$STEAMEXEPATH" "$@"
micpaq at Ordi-Bureau ~ $ assert_20200714165922_1.dmp[9549]: Finished 
uploading minidump (out-of-process): success = yes
assert_20200714165922_1.dmp[9549]: response: 
CrashID=bp-c23a9ae6-7830-4029-ad0c-203732200714
assert_20200714165922_1.dmp[9549]: file 
''/tmp/dumps/assert_20200714165922_1.dmp'', upload yes: 
''CrashID=bp-c23a9ae6-7830-4029-ad0c-203732200714''
micpaq at Ordi-Bureau ~ $

merci pour toute aide
--
Michel