See if this helps:
$ export MESA_EXTENSION_OVERRIDE='GL_EXT_texture_filter_anisotropic'
$ steam
(from http://steamcommunity.com/app/221410/discussions/1/846938350918440776/#c846940247771356878)
It worked for me.
This was when I was running the open-source driver for AMD cards that comes with Ubuntu 12.10 64 bit. Installing the proprietary driver (with $ jockey-text -e kmod:fglrx_updates) seems to have solved the problem for me, though.
ty man
@avareh would you attach your system info as requested here https://github.com/ValveSoftware/steam-for-linux#reporting-issues and if you’ve updated your graphics drivers since then.
This looks like a FOSS driver / steam issue #567, #772
I just had this issue pop up with my 64-bit Mint install (https://gist.github.com/45ed161ede54ebc30909).
I'm having the issue with proprietary Nvidia drivers.
Closing old non-Valve issue (can still be found in search).
bigbang@bigbang:~$ steam
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
Looks like steam didn't shutdown cleanly, scheduling immediate update check
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
unlinked 0 orphaned pipes
removing stale semaphore last operated on by process 3495 with name 0eBlobRegistryMutex_C812574FCC800010FE5221B586F83E98
removing stale semaphore last operated on by process 3495 with name 0eBlobRegistrySignal_C812574FCC800010FE5221B586F83E98
removing stale semaphore last operated on by process 3495 with name 0emSteamEngineInstance
removing stale semaphore last operated on by process 3495 with name 0eSteamEngineLock
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
[1222/231956:WARNING:proxy_service.cc(646)] PAC support disabled because there is no system implementation
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
Installing breakpad exception handler for appid(steam)/version(1355957371_client)
GLError: 1280
GLError: 1280
GLError: 1280
GLError: 1280
GLError: 1280
GLError: 1280
GLError: 1280
GLError: 1280
GLError: 1280
GL: [API][ERROR][HIGH][0]: GL_INVALID_ENUM in glTexParameter(pname=GL_TEXTURE_MAX_ANISOTROPY_EXT)
/home/bigbang/.local/share/Steam/steam.sh: line 287: 3629 Trace/breakpoint trap (core dumped) $DEBUGGER "$STEAMROOT/$PLATFORM/$STEAMEXE" "$@"