arkasha@localhost ~> steam
/home/arkasha/.local/share/Steam/steam.sh: line 154: VERSION_ID: unbound variable
/home/arkasha/.local/share/Steam/steam.sh: line 154: VERSION_ID: unbound variable
Running Steam on gentoo  64-bit
STEAM_RUNTIME is enabled by the user
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)

(steam:15319): Gtk-WARNING **: Загружаемый модуль тем не найден в module_path: «adwaita»,
/usr/share/themes/Adwaita/gtk-2.0/main.rc:728: error: unexpected identifier `direction', expected character `}'

(steam:15319): Gtk-WARNING **: Загружаемый модуль тем не найден в module_path: «adwaita»,
Installing breakpad exception handler for appid(steam)/version(1476379980)
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element
Fontconfig error: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 70: non-double matrix element
Fontconfig warning: "/etc/fonts/conf.d/10-scale-bitmap-fonts.conf", line 78: saw unknown, expected number
[1127/042138:ERROR:main_delegate.cc(779)] Could not load cef_extensions.pak
[1127/042138:ERROR:browser_main_loop.cc(217)] Running without the SUID sandbox! See https://chromium.googlesource.com/chromium/src/+/master/docs/linux_suid_sandbox_development.md for more information on developing with the sandbox on.
Installing breakpad exception handler for appid(steamwebhelper)/version(20161013004706)
Installing breakpad exception handler for appid(steamwebhelper)/version(1476319626)
[1127/042138:ERROR:main_delegate.cc(779)] Could not load cef_extensions.pak
Installing breakpad exception handler for appid(steamwebhelper)/version(20161013004706)
Installing breakpad exception handler for appid(steamwebhelper)/version(1476379980)
Installing breakpad exception handler for appid(steamwebhelper)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Created shared memory when not owner SteamController_Shared_mem
Installing breakpad exception handler for appid(steam)/version(1476379980)
Installing breakpad exception handler for appid(steam)/version(1476379980)
Steam: An X Error occurred
X Error of failed request:  BadValue (integer parameter out of range for operation)
Major opcode of failed request:  18 (X_ChangeProperty)
Value in failed request:  0x40
Serial number of failed request:  103
xerror_handler: X failed, continuing
crash_20161127042137_1.dmp[15359]: Uploading dump (out-of-process)
/tmp/dumps/crash_20161127042137_1.dmp
/home/arkasha/.local/share/Steam/steam.sh: line 713: 15319 Ошибка сегментирования                   $STEAM_DEBUGGER "$STEAMROOT/$STEAMEXEPATH" "$@"
crash_20161127042137_1.dmp[15359]: Finished uploading minidump (out-of-process): success = yes
crash_20161127042137_1.dmp[15359]: response: CrashID=bp-9f15552d-bd82-4105-ba4f-dcf172161126
crash_20161127042137_1.dmp[15359]: file ''/tmp/dumps/crash_20161127042137_1.dmp'', upload yes: ''CrashID=bp-9f15552d-bd82-4105-ba4f-dcf172161126''

GDB: 

(gdb) backtrace
#0  0xf20c0516 in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/vgui2_s.so
#1  0xf7edda4b in _XError () from /home/arkasha/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libX11.so.6
#2  0xf7eda84d in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libX11.so.6
#3  0xf7eda8a7 in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libX11.so.6
#4  0xf7edb770 in _XReply () from /home/arkasha/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libX11.so.6
#5  0xf7ec0ac8 in XGetWindowProperty () from /home/arkasha/.local/share/Steam/ubuntu12_32/steam-runtime/i386/usr/lib/i386-linux-gnu/libX11.so.6
#6  0xf20c0673 in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/vgui2_s.so
#7  0xf4b6ca3a in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steamui.so
#8  0xf4c1d54e in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steamui.so
#9  0xf47c8c6c in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steamui.so
#10 0xf4759773 in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steamui.so
#11 0xf474efc3 in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steamui.so
#12 0xf46ad94c in ?? () from /home/arkasha/.local/share/Steam/ubuntu12_32/steamui.so
#13 0x5658bf30 in RunSteam(int, char**, bool) ()
#14 0x56577f67 in ?? ()
#15 0xf7b6c43e in __libc_start_main () from /lib32/libc.so.6
#16 0x5657aab9 in _start ()
(gdb)