Surface Pro 6 Firmware Updates Blamed for Introducing CPU Throttling Issue

Last week, Microsoft rolled out new firmware updates for various Surface devices. The company targeted devices including Surface Book 2, Surface Laptop 2, Surface Pro 6, and many others. The updates were pushed to fix existing problems for systems running Windows 10 version 1803 or Windows 10 version 1903.

Unfortunately, the latest Surface Pro 6 firmware update didn’t go smoothly at all. The update was meant to offer better battery performance for Windows 10 version 1803 or newer. However, the forum reports suggest that the latest firmware update breaks Surface Pro 6 devices. Those who have installed the update reported different issues.

One of the major problems that have been reported so far by hundreds of users is the CPU throttling issue. The problem is basically traced down to the battery drain problem that affected a good number of Surface devices. Microsoft acknowledged the bug and started working on it considering its large impact. As a temporary workaround, the Redmond giant decided to put BD PROCHOT (bi-directional processor hot) functionality into place.

Here’s how Surface Pro 6 user described the problem on the Reddit forum.

– Due to a faulty BDPROCHOT reading, the device can be stuck at 400 mhz after charge. A modern computer stuck at 400 mhz is unusable.

– The battery reading is broken. When the power state changes, it can be stuck at 100%. A mobile device that cannot give battery states is unusable on the go.

BD PROCHOT is a command that is used by BIOS to inform the processor to throttle. The latest firmware update triggers the command at an early stage to reduce the battery consumption because your processor will stop consuming power. It clearly means that Microsoft introduced the bug on purpose. The idea is to buy some more time to work on a permanent solution.

It seems like you might have to wait for a few months for a corresponding patch to be released. Luckily, Surface Pro 6 users managed to temporarily resolve the issue by using third-party applications such as Throttlestop. Those who are using these applications confirmed that they didn’t experience such problems.

It is not the first time that the latest firmware updates have introduced new problems for Surface Book devices. Users have been reporting issues such as crash when undocking and disappearing discrete GPU in the past. These problems are annoying and destroy the user experience for a high-end device like Surface Pro 6.

It would be interesting to see how Microsoft deals with this situation. Considering the large impact of this problem, Microsoft needs to revert this update as soon as possible.

Alex Schoff
Alex is a technology reporter with a particular interest in Microsoft and Windows. He keeps a close eye on major developments related to Windows 10, Google Chrome, Office 365, and more.