Your system information

• Graphics Card: AMD 290X
• Steam client version (build number or date): Dec 20 2017 16:08:21 (My guess from output below)
• Distribution: Ubuntu 17.10
• Opted into Steam client beta?: Yes
• Have you checked for system updates?: Yes

Please describe your issue in as much detail as possible:

After the updates from yesterday Steam fails to start with the following error message.

Running Steam on ubuntu 17.10 64-bit
STEAM_RUNTIME is enabled automatically
Pins up-to-date!
[2018-01-18 16:06:50] Startup - updater built Dec 20 2017 16:08:21
[2018-01-18 16:06:50] Opted in to client beta 'publicbeta' via beta file
You are in the 'publicbeta' client beta.
SteamUpdateUI: An X Error occurred
X Error of failed request: BadAlloc (insufficient resources for operation)
SteamUpdateUI: An X Error occurred
X Error of failed request: BadDrawable (invalid Pixmap or Window parameter)

Steps attempted to fix or remedy the error.

• Uninstall/reinstall steam (from commandline: sudo apt remove steam; sudo apt install steam)
• Install Padoka Stable PPA
• Update system (sudo apt update && sudo apt upgrade)