[2015-09-18 20:09:15] Downloading update (226,661 of 226,661 KB)...
[2015-09-18 20:09:15] Download Complete.
[2015-09-18 20:09:15] uninstalled manifest found in /home/volund/.steam/package/steam_client_ubuntu12 (1).
[2015-09-18 20:09:15] Extracting package...
[2015-09-18 20:09:26] Installing update...
[2015-09-18 20:09:26] Cleaning up...
[2015-09-18 20:09:26] Update complete, launching...
[2015-09-18 20:09:26] Shutdown
Running Steam on ubuntu 15.04 64-bit
STEAM_RUNTIME is enabled automatically
[2015-09-18 20:09:34] Startup - updater built Aug 19 2015 11:27:40
SteamUpdateUI: An X Error occurred
X Error of failed request:  BadValue (integer parameter out of range for operation)