Thanks for your response, Jon.
Indeed, the problems might have started with 5395; I don’t always notice when Zwift installs updates since I have so much to fuss with before my workouts. (I used to get some water and then ride. Now, I’ve got to make sure my ANT+ gear has good batteries, my Garmin is charged, I have electrode goop for my heart rate monitor. Then, I make sure the internet connection to my house is up, and I update Windows, check my drivers, charge my laptop, login to Zwift, let that update too. I might have to do a firmware update for my PowerTap Hub, or download an update for my Garmin. And so on.)
My laptop is a Lenovo Carbon X1 ThinkPad. There have been several generations of this model over the years; if you’re looking at Lenovo documentation, I have a “Type 20A7” model. The machine runs Windows 8.1, has 8 gigs of memory, and an Intel i7-4600 CPU, and has the optional high-resolution 2560x1440 display, though I run it at 1920x1080 because so many apps have logical pixels-per-inch bugs.
The machine has an Intel Graphics 4400 display adapter. The Intel HD graphics control panel says the “3D General Settings” are in “Performance” mode.
I’ve dug around in the power management settings for my laptop, but I can’t find anything that excuses this behaviour. About a week ago, I started running on power instead of the battery because running Zwift eats my battery: a 40-minute ride takes the battery from a 100% charge to a 40% charge.
In Task Manager, I believe that Zwift is CPU bound: it’s pegging a single core. I didn’t look at Task Manager previously, so I have no baseline. (I’ve been trying to focus on my workouts instead of screwing around with all this technology.) But I’m wondering if something in the updates didn’t cause Zwift to go single-threaded and scale down CPU usage, causing the perf problems I’ve noticed. For now, it seems I’m CPU-bound rather than GPU-bound.
How can I view the log that you’ve got? It would be much easier for me to troubleshoot my settings if I could see the Zwift framerate myself, preferably interactively.
I hope I can get this fixed; it’s been inspiring to use Zwift, but the terrible framerate and the resulting distraction is the opposite of motivating.