Surface Pro 4 type cover suddenly not working.

I'm trying my luck, and downloading this update

I had the same issue, except mine is with a surface pro 3 with a type cover from Surface Pro-4.

The issue, somehow, is related to a Windows update, that affected the way the surface pro detects the keyboard. If the keyboard is detected as a HID input device, it just doesn't work.

If the driver is detected, and it shows Surface Type Cover filter, the keyboard works like before.

I wish Microsoft can pay a little more attention to this. I am disappointed.

Having said that, I am currently updated to Windows 10 Pro-1809, Build 17763.615 and as of now, I am typing using my surface pro keyboard.

I am not sure if this condition will stay, I do hope so. I have tried disconnecting the keyboard and re-connecting it again and it works well.

I'll try later on with the reboot and if possible, sleep/wake test.

I am still doubtful, yet hopeful that somehow, this issue can be resolved.

Why would anyone buy a similar product from the same company, when they failed to keep the device in working condition with their own software updates. 

Exactly. I'm not the least bit tempted to get another Surface Pro when MS has left its users high and dry on the Type Cover fiasco.  The evidence suggests that they broke it; thus, they should fix it. But they won't.

I understand your perspective and agree that people have to look at the factors to decide for themselves whether or not the option is worth it for them to pursue.  The main point is that not everyone realized this was even an option to begin with.  Most are being told they'd be spending that money to get the same exact system back, which is not worth $450 for its age.  But paying $450 to get a newer generation system is still better than that.  For me, the 2017 gives me improved performance and addresses some of the issues I had with the SP4 in the first place (like the annoying fan noise and amount of throttling), so I found it worth the expense.  And I tend to keep my systems until they can no longer do what I need, so I have systems as old as 9+ years now.  I wouldn't buy a brand new Surface for any full price at this point until these firmware issues are addressed and a thing of the past, but $450 for a like-new unit from Microsoft still beats even $850-$900 used from elsewhere.  Yes, the correct and preferred option would be for MS to address the problem and release a firmware or option specifically to resolve it.  But that may, unfortunately, never be the case.  Sure, the same problem could happen to this one at some point.  But I'm still getting something better than what I was originally being offered.

It might sound like a good replacement to some, but there are many factors to

consider. 2017 model (Surface Pro 5) is going out of support very soon just like SP4 did and with these updates and non willingness to help by Microsoft would make you  go through this cycle again. $450 upgrade for a 2 year old device is not really a good deal for many, because these models (SP5 i7/16GB/512GB) are selling in the used market for around $850-$900, while SP4 i7/16GB/256GB) sells for around $650-$690.  A honest and logical answer by Microsoft should have been directing to the right update to install, instead of scrapping out the technology bundled with i7/16GB/256GB and coercing the buyer to get the upgrade of soon to be discontinued model. Why would anyone buy a similar product from the same company, when they failed to keep the device in working condition with their own software updates. 

My local Microsoft Store allowed me to get a Surface Pro 2017 upgrade as a replacement when doing a $450 out-of-warranty repair exchange for my SP4.  This may be an option for some SP3 and SP4 owners who don't want to feel as if they're not getting anything worthwhile by paying the out-of-warranty repair fee and getting back the same old system in return.

My original SP4 specs: (i7 / 16GB RAM / 256GB storage; SKU# FKS-00001)

Replacement Surface Pro 2017 specs: (i7 / 16GB RAM / 512GB storage; SKU# VR7-00001)

It might sound like a good replacement to some, but there are many factors to consider. 2017 model (Surface Pro 5) is going out of support very soon just like SP4 did and with these updates and non willingness to help by Microsoft would make you  go through this cycle again. $450 upgrade for a 2 year old device is not really a good deal for many, because these models (SP5 i7/16GB/512GB) are selling in the used market for around $850-$900, while SP4 i7/16GB/256GB) sells for around $650-$690.  A honest and logical answer by Microsoft should have been directing to the right update to install, instead of scrapping out the technology bundled with i7/16GB/256GB and coercing the buyer to get the upgrade of soon to be discontinued model. Why would anyone buy a similar product from the same company, when they failed to keep the device in working condition with their own software updates. 

My local Microsoft Store allowed me to get a Surface Pro 2017 upgrade as a replacement when doing a $450 out-of-warranty repair exchange for my SP4.  This may be an option for some SP3 and SP4 owners who don't want to feel as if they're not getting anything worthwhile by paying the out-of-warranty repair fee and getting back the same old system in return.

My original SP4 specs: (i7 / 16GB RAM / 256GB storage; SKU# FKS-00001)

Replacement Surface Pro 2017 specs: (i7 / 16GB RAM / 512GB storage; SKU# VR7-00001)