https://bugs.winehq.org/show_bug.cgi?id=45121
Bug ID: 45121 Summary: Steam uses high CPU while idle Product: Wine Version: 3.6 Hardware: x86 OS: Linux Status: UNCONFIRMED Severity: normal Priority: P2 Component: -unknown Assignee: wine-bugs@winehq.org Reporter: myjunkmail311006@gmail.com Distribution: ---
Reported to Steam Support:
Recent Steam versions are using high CPU. This is with CPU frequencies at minimum, which is necessary to prevent my computer from overheating. At maximum frequency, Steam CPU usage is around 15% (and wineserver 11%).
No games are open, and the main Window has been closed. No network activity, and no activity on the console with Steam invoked on the command line (bash).
Idle activity for Steam used to be around 5% for me. [...]
A support person replied with this:
As for the CPU performance issues, I've tested it on a few Windows devices and one Linux computer running Ubuntu (note I didn't test on WINE) and have been unable to reproduce the error you're seeing (all CPU usage for Steam was <1% when idle). I can only guess that this CPU performance issue is either related to WINE or a program which may be interfering with Steam.
I hope to get confirmation from other people whether this is, in fact, a bug with Wine or just a problem with my particular setup. I'm using Ubuntu 18.04, and this occurs with Wine 3.6 and 3.0 with the newest Steam.exe client, with both an old 32-bit prefix and a new 64-bit prefix.