Surface Book/Pro 4 Sleep Battery Drain (Skylake IGP edition)

If you have a Surface Pro 4 or a Surface Book, chances are, you’re experiencing pretty awful sleep (Connected Standby in particular) battery drain. This power state is designed to enable connectivity and near-instantaneous wakes, while consuming extremely little power think 10 days of battery life, in this state).

In order for this state (Intel calls the system state S0ix, or an active-idle state) to work, a combination of operating system, system firmware, and device drivers need to all act appropriately. The Intel integrated graphics devices appears to be a common cause of battery drain in sleep for Skylake-based systems. Sleep study reports (you can view them by running “powercfg sleepstudy” from an elevated command prompt) indicate the graphics device is active on the order of 15-17% of the time, while in sleep, causing 1W+ drain.

However, an updated Intel graphics driver, released December 22, 2015, version 15.40.14.64.4352, has improved that somewhat for my Surface Pro 4. Check it out – can you guess when I installed the driver?

sp4_sleepstudy

Power draw is still not where I’d like to see it (from my work on various SoC platforms, within Windows, I’d expect these Core-based systems to consume in the range of 100-150mW, on average), but it’s still a 40-50% improvement from where it was. This high drain is also likely why the Surface team implemented a rather short doze-to-hibernate timeout of 2 hours. It means I’m frequently resuming the device from hibernate (~12 seconds) instead of from Standby (<1 second).

The driver is currently only for 6th generation (Skylake) Core graphics and with a Surface, you’ll need to install it manually via Device Manager (great installation guide, at Windows Central), until Microsoft pushes it to this particular device ID via Windows Update. It seems to work just fine, though. If you’re seeing similar (better) results, let me know!

Microsoft 10 Devices Event

HoloLens

Band 2

Lumia 950/XL

Surface Pro 4

Surface Book

110 million Windows 10  devices

All that, plus swagger. For the first time, in a very long time, Microsoft showed some serious swagger, and boy, do we have a portfolio of aspirational products  to lead the way through the current and future frontiers of computing technology.

The Verge put together a great summary video of this morning’s announcement. Check it out here. If you want to experience the entire 1:47, it’s over at Microsoft.com.

There is deep, burning desire across the Internet nerdom for many of the products shown today. It’s been 3 years in the making, from the first Surface experiments to an ever-more complete portfolio of Windows devices, today. This is one critical piece of Satya’s goal to move people from using Windows to choosing Windows to loving Windows. It’s the beginning of what the Xbox has, a fanbase of users, who are deeply satisfied and recommend the products, without prompting.

I have no illusions of sudden grandeur or sentiment shift. I am well aware products need to crush it, many times in a row, before that goodwill is established and users start trusting the family of products (enough to pre-order, sight unseen, like others!). We’re just about there with the Surface lineup. Lumia is taking the first step in a multi-step journey. It’s also going to take a few iterations of purposeful and flawless execution to build the same position. And HoloLens, that’s even more nascent, but we know where we want to be and will drive relentlessly to deliver the vision, in its entirety.

I am excited about the products, awfully proud to be a part of the groups delivering them, and look forward to taking all these next steps.