I have notebook with hybrid video cards (intel and nvidia) so I use bumblebee and start steam like

optirun steam

Steam runs fine, but any game unables to locate running instance of Steam (Cogs example):

[S_API FAIL] SteamAPI_Init() failed; Sys_LoadModule failed to load: /home/davion/.steam/bin32/steamclient.so
[S_API FAIL] SteamAPI_Init() failed; unable to locate a running instance of Steam, or a local steamclient.dll.
[S_API FAIL] SteamAPI_Init() failed; Sys_LoadModule failed to load: /home/davion/.steam/bin32/steamclient.so
[S_API FAIL] SteamAPI_Init() failed; unable to locate a running instance of Steam, or a local steamclient.dll.
AL lib: pulseaudio.c:838: Device is suspended
AL lib: ALc.c:2325: exit(): closing 1 Device
AL lib: ALc.c:2247: alcCloseDevice(): destroying 1 Context(s)

Here is my system information:

Processor Information:
    Vendor:  GenuineIntel
    Speed: 2201 Mhz
    8 logical processors
    4 physical processors
    HyperThreading:  Supported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Unsupported
    SSE41:  Supported
    SSE42:  Supported

Network Information:
    Network Speed:  

Operating System Version:
    Linux Mint 14 Nadia (64 bit)
    Kernel Name:  Linux
    Kernel Version:  3.5.0-26-generic
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11300000
    X Window Manager:  Mutter (Muffin)
    Steam Runtime Version:  steam-runtime-release-i386_2013-03-25

Video Card:
    Driver:  NVIDIA Corporation GeForce GT 645M/PCIe/SSE2

    Driver Version:  4.2.0 NVIDIA 304.84
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 59 Hz
    VendorID:  0x10de
    DeviceID:  0xfd9
    Number of Monitors:  1
    Number of Logical Video Cards:  2
    Primary Display Resolution:  1366 x 768
    Desktop Resolution: 1366 x 768
    Primary Display Size: 13.54" x 7.64"  (15.51" diag)
                                            34.4cm x 19.4cm  (39.4cm diag)
    Primary VRAM: 2048 MB

Sound card:
    Audio device: Intel PantherPoint HDMI

Memory:
    RAM:  7848 Mb

Miscellaneous:
    UI Language:  English
    LANG:  en_US.UTF-8
    Microphone:  Not set
    Total Hard Disk Space Available:  734111 Mb
    Largest Free Hard Disk Block:  653118 Mb

Installed software:

Recent Failure Reports:
    Thu Apr  4 20:57:56 2013 GMT: file ''/tmp/dumps/assert_20130404235742_1.dmp'', upload yes: ''CrashID=bp-0afc3687-686a-4a81-aa0e-be1d82130404
    ''