Eu criei um ticket de suporte a vapor para isso. Eles deram essa solução . Quando você enfrenta isso não pode iniciar registry.vdf está faltando problema, você precisa redefinir o vapor e reiniciar o sistema.
Eu instalei vapor no meu Laptop rodando 13.10, Quando eu clico no ícone de vapor, ele não inicia, Então eu dei o comando "steam" no terminal. Seguindo é a saída
Running Steam on ubuntu 13.10 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(0_client)
Uploading dump (out-of-process) [proxy '']
/tmp/dumps/crash_20140402034337_1.dmp
/home/saikiran/.local/share/Steam/steam.sh: line 755: 6814 Segmentation fault (core dumped) $STEAM_DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"
mv: cannot stat ‘/home/saikiran/.steam/registry.vdf’: No such file or directory
Installing bootstrap /home/saikiran/.local/share/Steam/bootstrap.tar.xz
Reset complete!
Restarting Steam by request...
Finished uploading minidump (out-of-process): success = yes
response: CrashID=bp-1e1a9170-2ae6-46c1-bc74-3c0db2140401
Running Steam on ubuntu 13.10 64-bit
STEAM_RUNTIME has been set by the user to: /home/saikiran/.local/share/Steam/ubuntu12_32/steam-runtime
Installing breakpad exception handler for appid(steam)/version(0_client)
Uploading dump (out-of-process) [proxy '']
/tmp/dumps/crash_20140402034339_1.dmp
/home/saikiran/.local/share/Steam/steam.sh: line 755: 6943 Segmentation fault (core dumped) $STEAM_DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"
Finished uploading minidump (out-of-process): success = yes
response: CrashID=bp-06b25061-5bb4-42c2-b835-bc2e92140401
Eu tentei remover ~ / .steam / steam / appcache conforme indicado em outros tópicos
Eu instalei o Steam no Xubuntu 14.04 beta, ainda acontece a mesma coisa.