Microsoft: Latest Windows 10 1903 Update Can Cause CPU Spikes, Break Desktop Search


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Earlier this week, reports surfaced that some Windows 10 users are having problems with Windows 10 1903. The latest cumulative update released for the OS, KB4512941, can cause CPU usage to surge to 30 percent or even as high as 100 percent. Separately from that, some users are also reporting that Windows Desktop Search is completely broken.

According to Microsoft, the broken search issue only affects systems which have disabled the “Search the web” functionality embedded in desktop search. I admit, this kind of acknowledgment always makes me a bit grumpy, mostly because I’ve never understood why anyone would want web-search functionality integrated into desktop search in the first place. If I’m searching my desktop, I’m definitionally not searching the World Wide Web. Cluttering my results with data from locations that aren’t going to contain what I’m looking for isn’t a value-add, it’s an active detriment to the entire point of using a desktop search as opposed to a web search.

MS-Search-Problem

Separately from these issues, Windows 10 1903 is still grappling with a laundry list of problems. The company still doesn’t recommend installing 1903 on Surface Book 2 models with a discrete GPU because the update can break discrete GPU functionality. Some Qualcomm and Realtek device driver versions aren’t compatible with the update. Some users with an Intel Audio Driver have reported faster-than-expected battery drain, and the company hasn’t fixed an issue causing problems with gamma ramps, color profiles, and night light settings. This one produced some spectacular (and puzzling) visual results while we were testing the 5700 and 5700 XT for AMD’s Navi launch back in July.

In most of these cases, Microsoft has “mitigated” the problem by blocking affected products from updating to Windows 10 1903 automatically. The problem with that approach, however, is that it doesn’t address the issues of people who updated to 1903 already and didn’t discover it was the cause of their issues until the rollback window had already passed. It’s easy to remove a single Windows Update, like the cumulative KB4512941 that’s causing the new issues with CPU usage, but rolling back the entire 1903 installation is something you have to do within 30 days.

As for the broken desktop search functionality, that’s an issue I’ve actually run into before with earlier Windows 10 updates. When I updated my desktop to Windows 10 1809, it broke desktop search. I rolled the update back as a result, even though I wasn’t impacted by the data-deletion bug that affected some users.

Affected users should try uninstalling KB4512941. Users who still can’t install 1903 should wait to see if Microsoft will be able to resolve any of these issues before 1909 comes out. Microsoft has made significant changes to how it tests future Windows builds in the Windows Insider program. The result of these changes should be a longer overall test cycle and hopefully updates that will break less code moving forward, but 1903 was released before these changes had gone into effect. We may not see the impact of these changes until Windows releases its 2020 updates.

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Microsoft May Finally Launch Dual-Screen Device at Oct. 2 Surface Event


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Microsoft is holding its next Surface event in New York City on October 2 and rumors are buzzing that the company could launch its long-rumored, never-shipped dual-screen device, codenamed Centaurus. It would be a significant change of approach if the company did. After initially leading the way with a series of impressive products, Surface has been quiet (in brand terms) for the past few years. Designs like the Surface Book have been refreshed, but the last major product to be introduced under the Surface brand was the Surface Laptop. (The Surface Hub is technically branded as a Surface product, but it sells for vastly more money and isn’t really consumer-oriented.)

Microsoft has demoed Centaurus at internal events, indicating that the device may be nearing completion. We’ve seen Intel push OEMs to create some dual-screen devices — the company demoed its Honeycomb Glacier concept at Computex this year, which drew some praise (and eyeballs) for its unusual design:

That’s what Honeycomb Glacier looked like when folded flat, and it’s not necessarily all that appealing. Open, however, the laptop reportedly offered a second display that worked rather well for at least some use-cases:

Intel-Honeycomb-Glacier-Feature

Intel has also created prototypes like Tiger Rapids, a folding dual-display concept with a conventional display on one side and an e-ink panel for inking and writing on the other. That concept has been commercialized as the Yoga Book C930 from Lenovo. One major question about the new Surface devices would be this: Are they intended to be general-purpose machines for regular users, or specialty devices that appeal to narrow market segments?

Since it launched Surface, Microsoft has devoted time to both market groups. The initial Surface Pro and Surface were an attempt to push PCs into tablet form factors, with detachable keyboards, fanless operation (some models), and an emphasis on weight and battery life. Later, Microsoft branched out into more niche concepts like the Surface BookSEEAMAZON_ET_135 See Amazon ET commerce (2-in-1 tablet, but with a discrete GPU), Surface Hub (corporate presentations), and Surface Studio (focused on creatives and featuring Surface Dial). Other products, like the Surface Laptop, were initially intended for users who wanted a stripped-down and limited version of Windows before Microsoft changed strategies and decided to market the system primarily to ordinary users.

Complicating this scenario is the fact that Microsoft has never actually shown Centaurus or its rumored predecessor, Andromeda, to the public. Some Surface products that have been rumored for years simply never materialize. Remember the Surface Phone? It was rumored to be right around the corner for several years, even as Microsoft tore up its plans for Windows 10 Mobile. There were even a few rumors that the company would still launch Surface Phone after shutting down its phone division, or that it would partner with a third-party company to create some kind of product. Nothing ever materialized.

Right now, the rumor mill seems to think dual screens are the juicy feature on tap for the event; if Microsoft has anything else in the till that it hasn’t shown off the company has been quiet about it. The new launch may feature products from Intel’s 10th Generation CPU family, but Surface has been historically slow to adapt cutting-edge Intel parts — it isn’t unusual for Microsoft to tap older hardware for its various updates. Ice Lake’s 10nm chips are expected to be a huge leap forward for Intel integrated graphics, however, and it would make a lot of sense for Microsoft to tap those CPUs for the Surface Pro and Surface Book. A new Surface Book might feature Intel Gen 11 graphics for the CPU, with a Turing GPU option available via a partnership with Nvidia, for example, improving both integrated and discrete performance.

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Microsoft Confirms Some Surface Pro 6, Surface Book 2s Are Running at Pentium II Speeds


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If you own a Surface Pro 6 or Surface Book 2 and you’ve noticed slower-than-expected performance lately, we’ve got good news: You aren’t imagining it. We’ve also got bad news: Currently, there is no fix, though Microsoft is reportedly working on one. There have been reports on Reddit from users who saw their CPU speeds falling to as low as 400MHz, even on systems plugged into the wall. What makes this issue a little curious, however, is that some of these reports go back for several years.

TechRepublic contacted Microsoft, who said: “We are aware of some customers reporting a scenario with their Surface Books where CPU speeds are slowed,” a Microsoft spokesperson told TechRepublic. “We are quickly working to address via a firmware update.”

While this quote doesn’t reference the issue with Surface Pro, some of the Reddit threads focus on that platform rather than the Surface Book or Surface Book 2.SEEAMAZON_ET_135 See Amazon ET commerce In this case, however, it appears that the issue has been flying along under the radar for a while — long enough that people have found their own fix. There’s a third-party utility called ThrottleStop. It can be used to disable a specific CPU instruction called BD PROCHOT.

What’s a BD PROCHOT?

BD PROCHOT stands for “Bidirectional processor hot.” ‘Bidirectional’ refers to the fact that this signal can be thrown by the CPU itself (to lower its own temperature) or by another component as a means of protecting that part from overheating. Imagine, for example, that your GPU was going to overheat and damage itself due to high operating temperature. The GPU can throw this flag to reduce the CPU’s frequency, reducing the processing work that was causing an overheat in the first place.

ThrottleStop

It is not clear exactly which components can use the BD PROCHOT function. It was introduced at a time when individual components paid less attention to their own thermal conditions and performed less clock throttling overall, though that intelligence has been baked into mobile hardware at various times and in various ways. Some modern systems measure skin temperature and use it as part of determining their operating frequencies, for example.

Because BD PROCHOT is bidirectional, there’s a potential risk here. The flag can be thrown by a different component that isn’t the CPU, which means (in theory), you’re overriding a component that’s trying to preserve its own functionality by telling the CPU to slow down. But this does not seem to be an explanation for what’s going on with Surface devices. Customers report these problems on products that show no signs of any overheat, and some customers who have used the ThrottleStop utility to turn the BD PROCHOT function off have gone on to use their products for a year or more without any problems.

There are non-Surface users who have reported BD PROCHOT issues as well over the years, so this isn’t a Microsoft-specific instruction or capability, though the issue does seem to be hitting Surface in particular right now. Users who need to use ThrottleStop to restore normal functionality can probably attempt doing so. If you do, be cautious. Don’t disable BD PROCHOT and then run the ugliest thermal workload you can find — turn the flag off and let the system sit at idle or run a YouTube video. See if you notice any inappropriate behavior or hot spot formation on the device. If you run into problems, you can use the utility again to restore default functionality.

Devices like the Surface Book and Surface Pro 6 are thin, which means any significant source of inappropriate heat is likely to migrate to the surface (no pun intended) of the device. So before you disable BD PROCHOT, if you’re concerned about the impact, take a moment to familiarize yourself with how hot your Surface Book or Surface Pro 6 feels to the touch now. Then disable BD PROCHOT and run the same check after giving the system time to warm up. If the machine stays stable and you have no other problems, you’re probably fine to use it. Just keep an eye out for a fix from Microsoft.

If your machine feels hotter to the touch than it ought to, or the heat is building up in an unusual spot for your machine, we advise against disabling PROCHOT until more information is available. People reporting this issue seem to be experiencing a bug rather than a genuine problem but that is not a guarantee. If you experience any instabilities or thermal issues after disabling BD PROCHOT via third-party utility, re-enable it immediately and contact Microsoft for additional service instructions.

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