user@debian:~$ steam
Running Steam on debian 8 64-bit
STEAM_RUNTIME is enabled automatically
Installing breakpad exception handler for appid(steam)/version(1465948400)
Xlib:  extension "GLX" missing on display ":0.0".
Installing breakpad exception handler for appid(steam)/version(1465948400)
Installing breakpad exception handler for appid(steam)/version(1465948400)
Xlib:  extension "GLX" missing on display ":0.0".
Xlib:  extension "GLX" missing on display ":0.0".
OpenGL GLX extension not supported by displayMain.cpp (310) : Assertion Failed: Fatal Error: OpenGL GLX extension not supported by display
Assert( Assertion Failed: Fatal Error: OpenGL GLX extension not supported by display ):Main.cpp:310

Installing breakpad exception handler for appid(steam)/version(1465948400)
assert_20160626183954_5.dmp[4511]: Uploading dump (out-of-process)
/tmp/dumps/assert_20160626183954_5.dmp
assert_20160626183954_5.dmp[4511]: Finished uploading minidump (out-of-process): success = yes
assert_20160626183954_5.dmp[4511]: response: CrashID=bp-f91bcf08-f2e3-4b74-bce5-52b352160626
assert_20160626183954_5.dmp[4511]: file ''/tmp/dumps/assert_20160626183954_5.dmp'', upload yes: ''CrashID=bp-f91bcf08-f2e3-4b74-bce5-52b352160626''