Gamexplain Explains the Joy-Con Desyncing Problem

Narratives are created super easily.

If they continue to stay silent on it, it will be a lot worse for them than if they said anything.

Unless, of course, they have nothing to say and this caught them off-guard, too. Which is the worst case scenario, because it speaks to a level of incompetence, and a diminished faith that it can be fixed before release, that would get even the most hardcore Nintendo fans currently shaking their fists at my twitter to think twice.

I believe they're just preparing the message they want to deliver. Nintendo isn't known for super fast communication.

They aren't known for good communication in general unfortunately.

But they can't let this just float in the air. The Gamexplain video will gain a lot of traction and Nintendo needs to be called out on this issue. They will have to respond in some way.
 
Summarizing some of what I’ve read, in the past few pages:
...This is why I think it's a failure to transition between usage modes. With all the complicated configurations and setups and being able to switch at any time this seems like a classic bug that doesn't get discovered until it's in mass usage. It only happens one in 1,000 transitions but now you have hundreds of people using it and transitioning modes...

...Something happens with BT radios either way [even accounting for the fact that the joycon have wired communication with the Switch when attached]. Do they [the radios] disable in docked mode? As I said earlier, unlikely. They need to be on and ready [perhaps in a ‘lower power’ usage mode] for Joycon removal at any moment, otherwise you'd get a pairing delay that would not sit well with the whole 'instantly' Switch theme the entire console has...

...Boosting the output power through a firmware update could likely require re-certification unless they already certified it with a higher output power. It seems strange that they would lock the chip into a low power mode though, as most modern chipsets offer dynamic power control even for Class 2 devices where it is technically not required. This means that lowering the output power actually doesn't save you much power (though people often assume it does) because the device will only increase the power when needed...

Switch controller range test:
https://youtu.be/HmRtEdA5OKI

There is big different between joy-con only / put in joy-con [charging] grip

Range:pro control (25 steps) >joy-con grip (22 steps) >joy-con only (15steps)

https://www.youtube.com/watch?v=HmRtEdA5OKI
“The charging grip does make a difference… if you use the joycon separately you had like 15 steps range, when you use the charging grip you had 22 steps range… [compared to] 25 steps [with the Pro controller]...”

ok this virtually confirms there are different transmission levels in effect for the BT radio in the Joycons...

...When the Joycons are connected to the charging grip, they yield a range that is 46% better than when by themselves. This indicates when they're by themselves, they're transmitting at a far lower power level...

...Though it could just be that when they are in the grip, the hand position is less blocking. When you have them separated, it seems like you are more likely to wrap your hands around them.

...The other reports from Kotaku, Polygon etc indicate that using them in the standard grip makes no difference, connection problems persist. But you are right, to control for variables testing using the standard grip vs the charging grip should be done, however I'm fairly confident this is merely an issue of transmit power, and that while undocked it is dialed way down, or a bug is preventing it from dialing up when required.

Since I have nothing better to do I tried to look into any FCC filings for the Joy-Cons. If HAC-015 (https://fccid.io/BKEHAC015) is the left Joy-Con, which seems likely, then we already have some information about the maximum output power.

HgW09v8.png


This suggests the output power is around 3-4 dBm, which is in-line with what you would expect from a Bluetooth Class2 device (maximum output power of 4dBm). While Bluetooth technically allows up to 20dBm output power for Class1 devices, most chips today will allow up to 10dBm output power. This is informally known as Class1.5 and is common since FCC does not require SAR testing for any devices with an output power below 10dBm.

The good news is then that Nintendo will most likely be able to increase the output power by around 6dB, which should in theory give around twice the current range. This will also not negatively affect the Battery life significantly, as the chip will dynamically change the output power as required. So the additional power will only be used when it otherwise would lose the connection.

The bad news is that the Joy-Cons will have to be re-certified, which means that Nintendo will likely not be able to have this done as a day-one firmware update unless they already caught this issue ahead of time and are in the process of fixing it already. (They will also likely have to measure SAR as well even if they are below the 10dBm limit, since Canada recently lowered the limit where you do not have to measure SAR to 6dBm).

The thing that surprises me however is that 4dBm should absolutely be enough power for the type of environments shown in the video above. Deliberately covering the entire device with both hands will probably always be a problem. The antenna is probably quite narrowband so doing that will likely detune it as well causing even more losses than what you get anyway from the absorption in the hands. But simply placing the device behind the back and breaking line-of-sight? When you are indoors and only a few meters away from the main console, this should absolutely not be a problem. So unless there is something really strange going on with their antennas (like if they didn't account for the detuning that might happen when you hold the device normally) then it might actually be possible that the real Joy-Cons are using lower power than they are certified for, either due to a firmware bug or because someone though it would increase battery life (it really shouldn't). In that case, it would be fairly simple to issue a new firmware to increase the power.
 
Since I have nothing better to do I tried to look into any FCC filings for the Joy-Cons. If HAC-015 (https://fccid.io/BKEHAC015) is the left Joy-Con, which seems likely, then we already have some information about the maximum output power.

HgW09v8.png


This suggests the output power is around 3-4 dBm, which is in-line with what you would expect from a Bluetooth Class2 device (maximum output power of 4dBm). While Bluetooth technically allows up to 20dBm output power for Class1 devices, most chips today will allow up to 10dBm output power. This is informally known as Class1.5 and is common since FCC does not require SAR testing for any devices with an output power below 10dBm.

The good news is then that Nintendo will most likely be able to increase the output power by around 6dB, which should in theory give around twice the current range. This will also not negatively affect the Battery life significantly, as the chip will dynamically change the output power as required. So the additional power will only be used when it otherwise would lose the connection.

The bad news is that the Joy-Cons will have to be re-certified, which means that Nintendo will likely not be able to have this done as a day-one firmware update unless they already caught this issue ahead of time and are in the process of fixing it already. (They will also likely have to measure SAR as well even if they are below the 10dBm limit, since Canada recently lowered the limit where you do not have to measure SAR to 6dBm).

The thing that surprises me however is that 4dBm should absolutely be enough power for the type of environments shown in the video above. Deliberately covering the entire device with both hands will probably always be a problem. The antenna is probably quite narrowband so doing that will likely detune it as well causing even more losses than what you get anyway from the absorption in the hands. But simply placing the device behind the back and breaking line-of-sight? When you are indoors and only a few meters away from the main console, this should absolutely not be a problem. So unless there is something really strange going on with their antennas (like if they didn't account for the detuning that might happen when you hold the device normally) then it might actually be possible that the real Joy-Cons are using lower power than they are certified for, either due to a firmware bug or because someone though it would increase battery life (it really shouldn't). In that case, it would be fairly simple to issue a new firmware to increase the power.
Very illuminating read, thanks! I would hope they caught the issue on time (seems quite doable in my eyes) and are capable of amplifying the system at launch. I don't think a limit on connections over more than a few meters is an issue, but the current distances that work flawlessly are simply too limited.
 
I believe they're just preparing the message they want to deliver. Nintendo isn't known for super fast communication.

They aren't known for good communication in general unfortunately.

But they can't let this just float in the air. The Gamexplain video will gain a lot of traction and Nintendo needs to be called out on this issue. They will have to respond in some way.

Here are the four scenarios I predict as possible:

1) We're aware of the issue and are attempting to fix it with a day one patch. Players who bring home a Switch on launch day will not have to worry.

2) We're aware of the issue and are preparing a post-launch patch to rectify it. (Post-launch patch can take anywhere from 1-6 months.)

3) We're aware of the issue and have included a graphic here showing the correct way to hold a joycon, as well as the correct distance from the TV.

4) We are not aware of any such issues. The Nintendo Switch will be available March 3rd with The Legend of Zelda: Breath of the Wild.
 
Here are the four scenarios I predict as possible:

1) We're aware of the issue and are attempting to fix it with a day one patch. Players who bring home a Switch on launch day will not have to worry.

2) We're aware of the issue and are preparing a post-launch patch to rectify it. (Post-launch patch can take anywhere from 1-6 months.)

3) We're aware of the issue and have included a graphic here showing the correct way to hold a joycon, as well as the correct distance from the TV.

4) We are not aware of any such issues. The Nintendo Switch will be available March 3rd with The Legend of Zelda: Breath of the Wild.


Place your bets!
 
Very illuminating read, thanks! I would hope they caught the issue on time (seems quite doable in my eyes) and are capable of amplifying the system at launch. I don't think a limit on connections over more than a few meters is an issue, but the current distances that work flawlessly are simply too limited.

Again, I do believe this is an issue that needs to be corrected, I just think the distances where it works flawlessly are more typical than those with issues. Also, if this is just a signal thing, it can be easily fixed on day 1.
 
Pro Controller pre-orders sold out everywhere. Can't believe I slept on this.

Might have to go to a midnight launch now just for a controller? Insane.
 
Again, I do believe this is an issue that needs to be corrected, I just think the distances where it works flawlessly are more typical than those with issues. Also, if this is just a signal thing, it can be easily fixed on day 1.
Yeah, I personally likely won't be bothered by it since I am close to my system (like 6 feet) but it should definitely work for people who are 10-12 feet out as well, so Nintendo should fix this. It's not a system-breaking issue in my opinion, but it is a problem that should be fixed (relatively) soon.
 
Here are the four scenarios I predict as possible:

1) We're aware of the issue and are attempting to fix it with a day one patch. Players who bring home a Switch on launch day will not have to worry.

2) We're aware of the issue and are preparing a post-launch patch to rectify it. (Post-launch patch can take anywhere from 1-6 months.)

3) We're aware of the issue and have included a graphic here showing the correct way to hold a joycon, as well as the correct distance from the TV.

4) We are not aware of any such issues. The Nintendo Switch will be available March 3rd with The Legend of Zelda: Breath of the Wild.

Then there's the Reggie scenario:

"After following up closely with the Nintendo staff working in our recent Switch events, we felt that players felt more immersive when they were playing in handheld mode than in TV mode. With the Switch we have a new minimalistic approach to everything, from the UI, to the available information pre launch, and so on. After a few internal tests, we realized that the best way to experience docked mode is quite close to your TV, but we didn't want intrusive messages popping up during gameplay, so we redesigned the power output of the joycons to slowly reward the player with erratic feedback. This allows him/her to get closer to their TV's while adjusting their playstyle until the sweet spot is found, increasing fun and adding a natural challenge to your new Nintendo Switch experience."
 

He is like 6-7m away from the console in an environment with lots of other signals interfering. This doesn't prove anything.


'Problem doesn't occur in controlled environment. Nothing to see here'


Even a 1% failure rate is pretty bad by todays standards (~20k people if they really sell 2 million at launch).

A controlled environment? Lol. Yeah, I'm sure all those signals from other Switch consoles interfering with your one, does make it way more stable. Or you know, the firmware they used for demo purposes already fixed this issue.
 
Here are the four scenarios I predict as possible:

1) We're aware of the issue and are attempting to fix it with a day one patch. Players who bring home a Switch on launch day will not have to worry.

2) We're aware of the issue and are preparing a post-launch patch to rectify it. (Post-launch patch can take anywhere from 1-6 months.)

3) We're aware of the issue and have included a graphic here showing the correct way to hold a joycon, as well as the correct distance from the TV.

4) We are not aware of any such issues. The Nintendo Switch will be available March 3rd with The Legend of Zelda: Breath of the Wild.

Its Nintendo im expecting Number 3.
 
Since I have nothing better to do I tried to look into any FCC filings for the Joy-Cons. If HAC-015 (https://fccid.io/BKEHAC015) is the left Joy-Con, which seems likely, then we already have some information about the maximum output power.

HgW09v8.png


This suggests the output power is around 3-4 dBm, which is in-line with what you would expect from a Bluetooth Class2 device (maximum output power of 4dBm). While Bluetooth technically allows up to 20dBm output power for Class1 devices, most chips today will allow up to 10dBm output power. This is informally known as Class1.5 and is common since FCC does not require SAR testing for any devices with an output power below 10dBm.

The good news is then that Nintendo will most likely be able to increase the output power by around 6dB, which should in theory give around twice the current range. This will also not negatively affect the Battery life significantly, as the chip will dynamically change the output power as required. So the additional power will only be used when it otherwise would lose the connection.

The bad news is that the Joy-Cons will have to be re-certified, which means that Nintendo will likely not be able to have this done as a day-one firmware update unless they already caught this issue ahead of time and are in the process of fixing it already. (They will also likely have to measure SAR as well even if they are below the 10dBm limit, since Canada recently lowered the limit where you do not have to measure SAR to 6dBm).

The thing that surprises me however is that 4dBm should absolutely be enough power for the type of environments shown in the video above. Deliberately covering the entire device with both hands will probably always be a problem. The antenna is probably quite narrowband so doing that will likely detune it as well causing even more losses than what you get anyway from the absorption in the hands. But simply placing the device behind the back and breaking line-of-sight? When you are indoors and only a few meters away from the main console, this should absolutely not be a problem. So unless there is something really strange going on with their antennas (like if they didn't account for the detuning that might happen when you hold the device normally) then it might actually be possible that the real Joy-Cons are using lower power than they are certified for, either due to a firmware bug or because someone though it would increase battery life (it really shouldn't). In that case, it would be fairly simple to issue a new firmware to increase the power.

you deserve an internet high five! thanks
 
I think Nintendo has to be competent enough to have been aware of this problem prior to sending out the units to reviewers... it's bizarre and a little worrisome. They SHOULD be openly communicating that they're working on the issue.

IMO
It's even more bizarre what people will give Nintendo a pass for just because it's Nintendo.
 
This is bad news, sure hope they can fix it but releasing a piece of hardware with this flaw is pretty rubbish. Not great if a potential fix reduces battery life per charge as already lots of people that believe the battery life to be short (that includes myself.)

I have been on the fence whether to purchase at launch or wait and see how things go, think this helps make my decision easier, not sure I want to be a hardware beta tester.
 
I think Nintendo has to be competent enough to have been aware of this problem prior to sending out the units to reviewers... it's bizarre and a little worrisome. They SHOULD be openly communicating that they're working on the issue.

IMO
It's even more bizarre what people will give Nintendo a pass for just because it's Nintendo.

The story of every bad news leading up to Switch's launch...
 
If the problem is presenting more on the left JoyCon, I wonder could it maybe be interference from smartwatches or other bluetooth devices causing the connection to be weaker?

It looks like the guy in the video is wearing an Apple Watch.
 
IMO
It's even more bizarre what people will give Nintendo a pass for just because it's Nintendo.

Well, I for one am not giving them a pass. I'm not just going into full panic mode yet, like many on GAF prefer. It's entirely possible this will be fixed with the Day One update. But why be calm and rational until we know for sure, when you can scream at Nintendo for not issuing a statement within <20 hours.
 
Probably waiting for reggie to come up with some of his incredible pr spin.
"Look, I know video games. Some of my most fond memories are playing them alongside my siblings, pressed up against the TV. That's the kind of atmosphere we wanted to re-create with the Nintendo Switch, when playing in Joy-Con mode. The experience of besting your rival in whatever you do, or cooperating with them, with the TV and Nintendo Switch console in close proximity.

Here, at Nintendo, we always strive to innovate, but we never forget the past and what made us who we were today. We hope that gamers worldwide, upon purchasing a Nintendo Switch at launch and trying it for themselves, will reflect upon past memories as well as create new ones."

In all seriousness, I'm sure this is just a defect they can correct with a firmware update. Or, at least, that's what I'm hoping for. I'm guessing we'll hear response from Nintendo in the next 24 hours or, in the worst case scenario, Monday. :(
 
This is bad news, sure hope they can fix it but releasing a piece of hardware with this flaw is pretty rubbish. Not great if a potential fix reduces battery life per charge as already lots of people that believe the battery life to be short (that includes myself.)

I have been on the fence whether to purchase at launch or wait and see how things go, think this helps make my decision easier, not sure I want to be a hardware beta tester.

How is 20 hours of battery life short?
 
Pro Controller pre-orders sold out everywhere. Can't believe I slept on this.

Might have to go to a midnight launch now just for a controller? Insane.

you're over reacting, it's not going to completely brick the console for you..just don't put your hands over it too much until it's patched.
 
Well, I for one am not giving them a pass. I'm not just going into full panic mode yet, like many on GAF prefer. It's entirely possible this will be fixed with the Day One update. But why be calm and rational until we know for sure, when you can scream at Nintendo for not issuing a statement within <20 hours.

Why does it have to be A) calm and rational or B) scream at Nintendo?
 
Hoping this doesn't become Switch's "you're holding it wrong" moment. Enough people now have experience with low-power Bluetooth devices to know this is not normal.
 
This is bad news, sure hope they can fix it but releasing a piece of hardware with this flaw is pretty rubbish. Not great if a potential fix reduces battery life per charge as already lots of people that believe the battery life to be short (that includes myself.)

I have been on the fence whether to purchase at launch or wait and see how things go, think this helps make my decision easier, not sure I want to be a hardware beta tester.

IF they have a fix that requires increased power, it likely will not be a significant change to battery life at all.

I have had a preorder seconds after the device was available online, but this problem is giving me a little bit of a pause, just because of the potential bad press that will go along with it.
If Nintendo comes out and says yeah, we got it fixed, no biggie, then I'm all good again, but I really, really want to hear it.
Holding on to my preorder. I believe!
 
I think Nintendo has to be competent enough to have been aware of this problem prior to sending out the units to reviewers... it's bizarre and a little worrisome. They SHOULD be openly communicating that they're working on the issue.

IMO
It's even more bizarre what people will give Nintendo a pass for just because it's Nintendo.

Who's giving them a pass?
 
If the problem is presenting more on the left JoyCon, I wonder could it maybe be interference from smartwatches or other bluetooth devices causing the connection to be weaker?

It looks like the guy in the video is wearing an Apple Watch.
That is extremely unlikely. Bluetooth is very robust when it comes to interference from other devices, especially other Bluetooth devices. A smartwatch should not be a big issue.
 
I know people will argue that they will always be close to switch and holding the joy cons correctly so this is not a big deal.

But what about the 1-2 switch and any other 'waggle' games where you are facing each other (instead of facing switch), I guess this will throw many more scenarios where your body is between the joy con and switch. It seems this will cause the most disruption to the signal. That time your friend was quicker on the draw then you, was he? Or did your input not get registered due to body blocking! :-O
 
Uhm... maybe the "oh yeah... well, glad I bought the pro controller" crowd ;)?

Well, I am glad I'm getting it, but I still think that its stupid to launch a console with such a glaring problem.

they knew this for sure.

So, if they do launch it, they better fix it day one.
 
Doubt it. People tried it for hours during hands-on event and it never happened.

I attended the Nintendo Switch Preview Event in Munich in January and couldn't notice any of this, but in the video it's clearly shown that there is a issue.
Still can't imagine how this is causing issues during normal play because usually you don't cover the Joy-Con with both hands or hold it behind your back. Also (at least I don't) who sit's 10 feet away from it's TV/console?
 
Depends. If Nintendo have purposefully programmed a weaker signal for battery life, then potentially they can just lift their signal strength cap.

If the hardware has an inherently weak signal, then yet, no software fix.

Are Bluetooth systems just the chip or do they hook into an antenna like wifi chips do? If it's just the chip then there shouldn't be any fundamental hardware limitation? Unless they sourced special 'low power only' BT chips
 
I attended the Nintendo Switch Preview Event in Munich in January and couldn't notice any of this, but in the video it's clearly shown that there is a issue.

Still can't imagine how it's affecting during normal play because usually you don't cover the Joy-Con with both hands or hold it behind your back. Also (at least I don't) who sit's 10 feet away from it's TV/console?

Back when I played Brawl on the Wii, I often used the nunchuck/Wiimote behind my back to piss people off. It was funny. I'd miss not being able to do that again.
 
I guess this explains why it doesn't happen when you have the joycons in the grip.
This could be the sign of a bug. The Joy-Cons maybe don't go into a "free mode", which enables a stronger signal, and stay in a "Grip-Mode", which sends out a weaker signal and uses the design of the grip to save battery-life. This would explain the wired difference.
Bugs also can always happen, even if the product it tested millions time. Let's hope, it's something like this.
 
I woke up and saw 20 pages in this thread. Went in expecting shitposts and screaming, turns out it's super informative and everyone's awesome.

Nice one GAF!
 
I attended the Nintendo Switch Preview Event in Munich in January and couldn't notice any of this, but in the video it's clearly shown that there is a issue.
Still can't imagine how this is causing issues during normal play because usually you don't cover the Joy-Con with both hands or hold it behind your back. Also (at least I don't) who sit's 10 feet away from it's TV/console?

People with tables, sitting groups, sofas and televisions over 40".
 
That is extremely unlikely. Bluetooth is very robust when it comes to interference from other devices, especially other Bluetooth devices. A smartwatch should not be a big issue.

I dunno, my bluetooth earphones have a noticeably weaker connection if I have my phone in my left pocket while I'm wearing my smartwatch.
 
If I was working at Nintendo I would be breaking down walls to get a statement out today on this, before the weekend.

If they don't it would make me more nervous that they're still figuring out what's going on - that they haven't yet done so. That sentiment would be a terrible way to start launch week...they need to nip it in the bud now.
 
I attended the Nintendo Switch Preview Event in Munich in January and couldn't notice any of this, but in the video it's clearly shown that there is a issue.
Still can't imagine how this is causing issues during normal play because usually you don't cover the Joy-Con with both hands or hold it behind your back. Also (at least I don't) who sit's 10 feet away from it's TV/console?

Gotta second this. Attended the DC Preview and played pretty much every single game there in a manner of different positions (ARMS, Zelda, MK8, Snipperclips, Puyo Puyo Tetris.... 1, 2 Switch especially required some different distances and positions in relation to the Switch unit.)

Didn't notice any issues myself, but as stated, the problem is clearly there. I really can't imagine it being too huge a deal though, especially if it's easily rectified as is being theorized. Fingers crossed, at least.
 
When wearing my AKG 845BT headphones combined with my iPhone 7 Plus, I get complete signal drops if the 7 is in my pocket and I bend down to pick something up. The iPhone gets pushed against my leg and a bit of my upper body.

None of this surprises me because Bluetooth (in general) is terrible. I also don't believe the problem described here will affect that many people. Even so, no firmware update is going to fix BT.
 
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