@haeckerfelix wait, what? 😳😅

I have the same issue! With a different chair, not from IKEA and only my main screen (the secondary one is identical though) shuts off randomly sometimes. Thought my GPU was bad or something, never could've thought it might be linked to the chair. 😅

@haeckerfelix Herman Miller EMP

@haeckerfelix Oh yes, there's a white paper about this issue. https://emcesd.com/pdf/eos93.pdf

@haeckerfelix Amazing!!! Thanks for sharing! 😯

@haeckerfelix eh, one of my external screens turns off for .5s when I turn on the light next to it, or sometimes when my fridge starts…

@haeckerfelix This reminds me of this : https://www.youtube.com/watch?v=PLs2ibJf6jo

@haeckerfelix WOW! I have this same symptom with a non-IKEA chair and hadn't yet been annoyed enough to figure out the cause. Thank you!

@haeckerfelix OMG, I might be impacted by this as well! Thanks for sharing

@haeckerfelix lol, my blanket at home reliably shuts off my screen for a second when I make my bed. It's quite clear though because it's audibly sparking the static electricity

@haeckerfelix EMP chair was not on my bingo card for 2023.

@haeckerfelix
Holy shit. I was looking at replacing my monitor, but if this is it.... wtf

@haeckerfelix So this might be why my computer screen has been randomly going blank in the past two years. Happened at least 2-3 times per week recently. So it might be the chair. 😂

@haeckerfelix OMG that's the chair I have o:

@haeckerfelix Have you tried waiving a towel at it while shouting "Cooeee! Mr Spaceship!"

Worked for Arthur and Ford with a similarly perplexing problem that turned out to be more of a time paradox than an intelligence test.

#HHGG

@haeckerfelix huh an entirely new version of "problem exists between chair and keyboard"

@haeckerfelix Whoa. I had exactly the same problem - except with a completely different chair. It disappeared once I got a new monitor, which apparently isn't as sensitive to ESD as the old one...

@haeckerfelix I had the exact same issue with another IKEA chair! But I didn't know it was the chair until now. All I know is that my wife's chair turned off every time I got up. (I was right next to her until)

Do you really think it's ESD?

@haeckerfelix interesting, I get these brief black screen moments, I assumed they were micro-power cuts, as my UPS tends to kick in for a couple of seconds at the same time.

@haeckerfelix there are (or used to be) anti-static sprays and you could put that on fabric to reduce static on the fabric. Grounding metal frame may help, but if probem is between fabric and your own body, then grounding metal frame may not do much.

@haeckerfelix a similar thing happens to me with my Steelcase Leap 2! I got the “billiard table” upholstery and the ESD will wake a computer from sleep that’s like ten feet away.

@haeckerfelix Holy shit, I have this exact same issue with another IKEA-chair

@haeckerfelix Tinfoil hat will solve it.

@haeckerfelix should read "chair not fcc (?) Compliant" :-) or who is the not refering to "may not produce harmful interference"? As the chair isn't an electric device it doesn't need to be tested I guess..

@haeckerfelix Yeah that's a well known problem.
At university we had this many times.
Than they tested out many screen stool combinations.
Also the floor covering has an impact.

@haeckerfelix I have this chair, but I never experienced this.

But I already knew that some chairs, not only IKEA’s, can have problems with screens.
There was a post about how the new chairs of a Dutch development company where their biggest problem. For almost the same reason.

@haeckerfelix Oh 😳so that‘s it. I‘ve been having this problem for years on my workplace. I always thought it was display related.

@haeckerfelix@mastodon.social OH MY GOD.
I was going insane because I though my electrical routing was fucked up or one of my monitors was broken. It was really weird because the problem persisted through 3 home moves.

NOW I KNOW WHY

@haeckerfelix @halfa ca m’était arrivé également avec des Herman Miller et écrans Dell !

@haeckerfelix My monitor does a similar thing where it blanks as if the signal was interrupted, and I've been unable to identify why, I was thinking there was a bad connection. But, thinking about it, it may have coincided with the timing of me adding an ikea cushion pad to my metal chair to aid in comfort. I'm gonna take the pad off and see if the interruptions stop.

@haeckerfelix I don't think you need to connect it to the ground; connecting appropriate two parts of the chair together should suffice. I would expect that the chair is not discharging any if that charge into air (it didn't have any spiky parts after all).

@haeckerfelix have this exact problem with a secretlabs chair (for gaming... yeah right). I have 2x external monitors both very different, the USB-C powered one always reacts if I move, the mains powered USB-C to DP doesn't so frequently. Thought it was a crappy usb dock to start with but then I completely changed computer setup and the problem remained.

@haeckerfelix 😂 That sparked a memory. JayzTwoCents had a video about it two years ago. https://www.youtube.com/watch?v=W62vlsIGzY4

Looks like properly grounding your chair was the only solution :(

@haeckerfelix
The leather variant of the Markus chair seems to be less dangerous. I have no ES problems here.
#ikea #chair #hardware #weird

@haeckerfelix THANK YOU FOR THIS POST. I have a completely different chair (not even Ikea) that also does this and now I know why !!!!

@haeckerfelix This is astounding, nay, breathtaking.

@haeckerfelix @roobre buy a good display port cable that is shielded and grounding the screen are also a couple of things that had been told to work.

@haeckerfelix there's a reason real office equipment does not come from IKEA (and tends to be not cheap, if you buy according to spec)

@haeckerfelix

This is the new best thing ever.

@haeckerfelix Great post. I had this issue in other forms. Due to the clear plastic mat protecting the wood floor, combined with dry winter weather and clothes worn. ESD is an issue always! :)

@haeckerfelix This sounds…AMAZING! I would be ‘Static Man’ and wheel myself everywhere in IKEA branded office comfort. No electronics, cats, dogs, small children, or spouses would be safe from my electric shock touch!
Mwahahahahahaha!

@haeckerfelix oh my gosh I'm not going crazy - it does have to do with my chair 🤯

@haeckerfelix Can also be caused by wearing silk underwear.

@haeckerfelix 🤯 I had the same with my old office chair in my old office. Weird AF every time I sat down.

@haeckerfelix @leyrer @fluepke Pass auf

@haeckerfelix

PEBKAC subverted!

@haeckerfelix Had that happen in a Office with Dell monitors and (I forgot the brand but expedience ones) Office chairs.
It was a Hardware company, so we had faraday/EMF blocking fabric around and that reduced the occurrence of that issue significantly

@haeckerfelix THAT IS THE EXACT PROBLEM I HAVE! 😂

Ever since I bought this chair my main monitor infrequently has to resync every time I stand up. It gets way worse once I wear specific pants (!) as they're out of polyester, causing the chair to not just disable the monitor but build up such a high charge that once anyone gets too near they receive quite the strong shock, including visible blue arcs and an audible bang.
Would attaching a virtual ground to the chair help? Don't know this stuff.

@haeckerfelix I am trying to decide if I fried a SBC I was messing with as a result of the fabric on my (not Ikea) chair. I get a static shock off of it constantly.

@haeckerfelix

Dude, sarcastically: "Hey man, nice electric chair."

You: "Thanks, yeah, I got it at IKEA."

Dude, mutters to self: "Damn, those Swedes are weird AF."

@haeckerfelix hahah wtf this is such an intriguing story. Worth investigating... Report this to IKEA

@haeckerfelix same issue here but whit a not ikea chaire 😱 I will test your solution

@haeckerfelix Love your idea, I may try it this winter!

I ran into the same problem a few years ago with my HP LP3065. Not sure if this is just ancedotal, but I have had success grounding the cabling well via grounding both devices being connected. This fixed most of my problem, other than the sparks on my butt as I get up :) Laptops have the biggest issue in my experience as they generally are isolated. Many screens are *also* isolated now...

@haeckerfelix https://www.snopes.com/fact-check/cone-of-silence/

Urban legend though it may be, the moral of the story is still pretty good - Just because the error report is crazy doesn't mean it's not real.

@haeckerfelix Who would have known chairs need to be FCC compliant?

@haeckerfelix My own solution is to ensure that the humidity in the room isn't too low, making static electricity much less likely to form.

@haeckerfelix wild. I've had this problem myself and assumed static electricity from my clothes. I never thought about it maybe being my chair.

@haeckerfelix @whatkatedoes ummmm maybe it wasn't the cable after all? 😂

@haeckerfelix Wow. I have the same chair, but haven't observed this issue yet. Will keep an eye on it!

@haeckerfelix

I've thought about getting one of those grounding bracelets when it's super dry in the winter at work. Maybe you need one on the chair. XP

@haeckerfelix Glad I got the leather version, I guess. 😅

@haeckerfelix Put a good ferrite bead on each of your monitor cables right near the monitor. That should help radiated immunity like that.

I wear EH shoes for work and live in the frozen north so winter is a shocking experience even without "helpful" furniture.

@haeckerfelix This is actually a know and documented issue with displaylink adapters. The gas strut compressing is the problem somehow but no one (that I’ve seen) has worked out why it happens. Even expensive chairs like some Herman Miller ones do it.

@haeckerfelix IME a little Static Guard to the chair seat and possibly back (my chair has a fabric back, yours might not) works for a week or two.

@haeckerfelix

But did you try wetting the chair?

@haeckerfelix To make it more complicated. I have a Markus chair as well, but have not any problems using my (Samsung) monitor. 🤔

@haeckerfelix Amazing. 😆

@haeckerfelix wow, exact same problem; Corsair chair, HDMI to a 2nd screen, how bizarre!!

@haeckerfelix Once Upon A Time there was just one woman in the office who crashed the computer every time she went near it.

Eventually we had to suggest to her - she hadn't worked it out for herself - that maybe she could try not wearing nylon underwear.

Which solved the problem.

@haeckerfelix

This happens to me every day but only when my headphones are in. It’s a pretty incredible journey for the static charge:

Chair -> Pants -> Legs -> Ears -> Earbuds -> 3.5mm extension cable -> 3.5mm to RCA Adapter -> Audio Mixer -> Macbook Audio Input -> Macbook Mobo -> HDMI Out -> Monitor

I've never doubted the cause, though. The monitor going black is always timed with a jolt of pain in my ears.

I'm using a #HermanMiller Embody and have no plans to ground the chair lol.

@haeckerfelix I had the same problem, not with IKEA, but with some other chair. First i thought I was having power fluctuations or bad wiring in the apartment.
I realised it was static when I once bent to grab something, my hair came close to the screen and it turned off!

@haeckerfelix Dave Jones (from eevblog) talked about chairs that makes ESD and turned off a screen a few years ago :)

https://invidious.fdn.fr/watch?v=r-V_Z3bD_PA

@haeckerfelix this is not PEBKAC but PIC (problem is chair).

@haeckerfelix wow this is incredible. thank you for sharing. what a time to be alive

@haeckerfelix I've had to do similar things with Herman miller embody's, they make a lot of static in a dry winter environment at 20% rh. I fried a displayport cable from a good distance once.

They were more or less banned from the EE lab, where esd compliant chairs and everything got installed after a few components met an untimely end.

@haeckerfelix had the same problem, solved it by buying display cables with a ferrite choke, or just adding on on your current cables.

@haeckerfelix I love how this is the chair's fault.

@haeckerfelix you need

@haeckerfelix That is super weird. Luckily I got the leather one and never experienced the issue but that would truly be maddening. I had a similar issue with a projector in our old church building where our hdmi splitter would randomly power cycle with no rhyme or reason. I finally found the culprit when a toddler went crazy on a light switch in a separate room and the power cycling lined up. Bad wiring + cheapo electronics!

@haeckerfelix guessing you want to upgrade your HDMI cables to something heavily shielded. Most modern cables are barely shielded at all (usually not many heavy transformers or similar in homes anymore). An upgrade may fix it.

If not… it’s something inside the screen being affected & some kind of foil/metal barrier would be needed

@haeckerfelix If it is the fabric, you can dilute some fabric-softener in water and spray the fabric. This reduces the fabric's ability to hod a charge.

@haeckerfelix Yeah this is a funny issue to find out. I used to have USB devices blip out and disconnect/reconnect every time my SO sat down or got up from a chair next to me.

Not so much an Ikea specific issue but gas suspension certainly and I guess the materials count too :)

@haeckerfelix Woah - you just solved why my TV turns off when we get up from one part of our new sectional sofa. I hope you figure out a solution to the problem other than the obvious: reupholster the seat with a less static-prone fabric.

@haeckerfelix I wonder what the electromagnetic effects are doing to your genitals?

@haeckerfelix I have this problem! Not an Ikea chair, but periodically my computer screen will go off for a sec. I wonder if my chair is the issue!

@haeckerfelix

WHOA! Thanks for posting this, I think I've got the same problem!

@haeckerfelix

cc @thegrugq @jwz @mattblaze

@haeckerfelix A funny coincidence, El Reg recently posted a similar story https://www.theregister.com/2023/04/28/on_call/

with a hairy pullover!

@haeckerfelix looks familiar to the phenomenon @eevblog did a video on 13 years ago https://youtube.com/watch?v=sUG_sjS67K4

@haeckerfelix

Umm, I might have a similar problem with my chair, though not as bad. I've been having troubles with my screen randomly going blank as well. Thanks for this post, I'll investigate.

#ikea #chair #hardware #weird

@haeckerfelix Should probably consider screening our furniture

@hillker har du en markus stol

@haeckerfelix
Ha, sounds similar to this French streamer who spent an entire session trying to figure out why his keyboard got disconnected every time he got up from his chair 🤔 https://youtu.be/PLs2ibJf6jo

@haeckerfelix whoa, I have exactly the same issue, I would never think about the chair

@haeckerfelix is your computer a macbook and/or are you using the short, non-earthed power cable with the power brick?