me@Linux ~ $ steam
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
unlinked 0 orphaned pipes
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
[1208/200041:WARNING:proxy_service.cc(646)] PAC support disabled because there is no system implementation
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Generating new string page texture 2: 48x256, total string texture memory is 49.15 KB
Generating new string page texture 3: 256x256, total string texture memory is 311.30 KB
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Adding license for package 17250
Adding license for package 16549
Adding license for package 0
Adding license for package 12361
roaming config store loaded successfully - 2854 bytes.
migrating temporary roaming config store
ExecCommandLine: "/home/brandon/Steam/ubuntu12_32/steam"
Generating new string page texture 72: 128x256, total string texture memory is 442.37 KB
Generating new string page texture 73: 128x256, total string texture memory is 131.07 KB
Generating new string page texture 74: 64x256, total string texture memory is 507.90 KB
Generating new string page texture 75: 32x256, total string texture memory is 540.67 KB

(steam:26809): Gtk-CRITICAL **: IA__gtk_widget_get_visible: assertion `GTK_IS_WIDGET (widget)' failed

(steam:26809): Gtk-CRITICAL **: IA__gtk_widget_set_visible: assertion `GTK_IS_WIDGET (widget)' failed

(steam:26809): Gtk-CRITICAL **: IA__gtk_widget_set_visible: assertion `GTK_IS_WIDGET (widget)' failed

(steam:26809): GLib-GObject-WARNING **: invalid uninstantiatable type `<invalid>' in cast to `GObject'

(steam:26809): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
Generating new string page texture 82: 8x256, total string texture memory is 548.86 KB
System startup time: 8.42 seconds
ExecSteamURL: "steam://open/driverhelperready"
Generating new string page texture 90: 256x256, total string texture memory is 393.22 KB
Generating new string page texture 107: 16x256, total string texture memory is 565.25 KB
Generating new string page texture 108: 128x256, total string texture memory is 696.32 KB
Game update: AppID 41070 "Serious Sam 3: BFE", ProcID 26941, IP 0.0.0.0:0
saving roaming config store to 'sharedconfig.vdf'
roaming config store 2 saved successfully

(steam:26809): Gtk-CRITICAL **: IA__gtk_widget_get_visible: assertion `GTK_IS_WIDGET (widget)' failed

(steam:26809): Gtk-CRITICAL **: IA__gtk_widget_set_visible: assertion `GTK_IS_WIDGET (widget)' failed

(steam:26809): Gtk-CRITICAL **: IA__gtk_widget_set_visible: assertion `GTK_IS_WIDGET (widget)' failed

(steam:26809): GLib-GObject-WARNING **: invalid uninstantiatable type `(null)' in cast to `GObject'

(steam:26809): GLib-GObject-CRITICAL **: g_object_unref: assertion `G_IS_OBJECT (object)' failed
INF: GameEnv API: Steam
Setting breakpad minidump AppID = 41070
Steam_SetMinidumpSteamID: Caching Steam ID: 76561198075314588 [API loaded no]
INF: Encoded user ID = 29e9d4bb:6f06f367
INF: 
INF: * Desktop settings...
INF: Color depth: 32-bit
INF: Desktop resolution: 1920 x 1080
INF: Fullscreen on primary display
WRN: Failed to capture mouse
INF: 
INF: Gfx API: OpenGL
INF: Resolution: 1920 x 1080
INF: Vendor: nVidia (0x10DE)
INF: Driver: NVIDIA Corporation (0x1244)
INF: Renderer: GeForce GTX 550 Ti/PCIe/SSE2/3DNOW!
INF: Version: 4.3.0 NVIDIA 310.19
INF: Video memory size: 1024 MB
INF: Available for textures: 1024 MB
INF: Active GPU(s): 1
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.rear
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.center_lfe
ALSA lib pcm.c:2217:(snd_pcm_open_noupdate) Unknown PCM cards.pcm.side
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib audio/pcm_bluetooth.c:1614:(audioservice_expect) BT_GET_CAPABILITIES failed : Input/output error(5)
ALSA lib pcm_dmix.c:957:(snd_pcm_dmix_open) The dmix plugin supports only playback stream
Cannot connect to server socket err = No such file or directory
Cannot connect to server socket
jack server is not running or cannot be started
INF: 
INF: Sfx API: OpenAL
INF: Device: PulseAudio Default
INF: Mixer frequency: 44100 Hz
INF: Mixer voices: 64
INF: Max sound sources: 25
INF: Max total volume: 3
INF: Speaker config: (unknown)
INF: Environment FX: not supported
INF: 
INF: AutoDetect: No previous hardware values stored, adjusting settings automatically.
INF: CPU efficiency: 2530.8 MHz * 4 cores = 6073.92 Mhz
INF: ID: 0x1244; card: GeForce GTX 550 Ti; quality: 3
INF: AutoDetect: storing new settings: gfx_iPixelProgramVersion=30,gfx_ctConcurrentGPUs=1,sys_iGPUVendorID=4318,sys_iCPUFamily=15,sys_iCPUMHz=2812,sys_iGPUDeviceID=4676,sys_strCPUVendor=AuthenticAMD,gfx_ulVideoMemoryMB=1023,
Installing breakpad exception handler for appid(gameoverlayui)/version(20121207153333_client)
Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
[1208/200112:WARNING:proxy_service.cc(646)] PAC support disabled because there is no system implementation
INF: Started simulation on 'Content/SeriousSam3/Levels/Menu/Intro.wld' in 0.54 seconds.
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
Installing breakpad exception handler for appid(steam)/version(1354925460_client)
ERR: Failed to precache texture Content/SeriousSam3/Models/Vehicles/FrontLoader02/Textures/Wheel_01_CM.tex; it doesn't exist in memory
INF: Started simulation on 'Content/SeriousSam3/Levels/Menu/MenuLevel.wld' in 0.04 seconds.
INF: Fullscreen on primary display
INF: Fullscreen on primary display
INF: Fullscreen on primary display
Uploading dump (in-process) [proxy '']
/tmp/dumps/crash_20121208200420_1.dmp
success = yes
response: CrashID=bp-b32e97bf-cc37-42d6-88c1-08ecd2121208
Assert( Assertion Failed: bRet ):/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/clientdll/../common/pipes.cpp:659

Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
/home/brandon/Steam/steam.sh: line 287: 26809 Floating point exception(core dumped) $DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"
Me@Linux ~ $ Uploading dump (in-process) [proxy '']
/tmp/dumps/assert_20121208200429_1.dmp
success = yes
response: CrashID=bp-8af84c32-cc2b-4010-8d7d-9e7b12121208
pipes.cpp (722) : Assertion Failed: Stalled cross-thread pipe
pipes.cpp (722) : Fatal assert failed: /home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/clientdll/../common/pipes.cpp, line 722. Application exiting.

Assert( Fatal assert ):/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/clientdll/../common/pipes.cpp:722

Installing breakpad exception handler for appid(sam3)/version(1.0_client)
Uploading dump (in-process) [proxy '']
/tmp/dumps/assert_20121208200720_1.dmp
success = yes
response: CrashID=bp-14a2ebb6-39ab-4234-a1f7-4d2532121208
_ExitOnFatalAssert
Assert( Assertion Failed: pClientPipe->BWriteAndReadResult( buf, bufRet ) ):/home/buildbot/buildslave_steam/steam_rel_client_ubuntu12_linux/build/src/clientdll/steamclient.cpp:522

Installing breakpad exception handler for appid(gameoverlayui)/version(1.0_client)
Uploading dump (in-process) [proxy '']
/tmp/dumps/assert_20121208200725_2.dmp
success = yes
response: CrashID=bp-ab05550d-60cf-4ab1-af4a-e22ea2121208