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Check if your IKEA chair is compatible with your screen

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Re: Check if your IKEA chair is compatible with your screen

#171

Wow, I can't believe this. I have a Markus Ikea chair and a dual screen setup with a USB c hub connecting them all. The screen likes to turn off all of the time and it drives me nuts. A good smack quickly fixes it. I never considered the chair. Mind blown with static discharge.

I've got the exact same problem and now I'm nearly positive (ha ha) that it's being caused by my mesh-backed AmazonBasics chair. Truly one of the most personally useful posts I've ever seen on HN.

Re: Check if your IKEA chair is compatible with your screen

#172
Had a similar issue with a previous standing desk: turning the motor on to adjust the height of the desk would turn on the RGBs on my keyboard (which uses a skeleton-like structure, so you can see the wires), though not always.

After some trial and error I determined the motor likely produces enough interference to trigger the RGBs to turn on. I ended up just cutting the RGB cables because I didn't use them anyway, as I didn't have anything to shield the keyboard (or anything else for that matter) from the motor.

Re: Check if your IKEA chair is compatible with your screen

#173

I once had the problem that running make with too many parallel jobs (-j) would change my keyboard layout. The machine was some laptop mainboard glued to the backside of my monitor, and the USB socket came out at the top of the mainboard. On its way down, the USB cable for the keyboard passed across the whole mainboard. On high load, the mainboard created enough interference to cause the connection to reset, re-hotpl…

So, a DIY setup. I guess that when you are making a production model (ex: iMac), this is the kind of thing you have to test for.

We had an interference problem at work once, in a VME rack, an I/O board with a particularly large coil was messing with the CPU board, solved by moving the offending board in another slot. The effect was mostly random crashes and reboot though, nothing fancy like a keyboard layout change.

Re: Check if your IKEA chair is compatible with your screen

#175
post #68

Earlier quoted context omitted.

I currently have an RPi4 mounted to the back of my TV for easy Kodi streaming, but I never considered using the business end of a laptop. I'm sure I have a decade old laptop with a broken screen sitting at the bottom of a shelf somewhere...

I invested in a frame.work laptop. If I ever purchase a new mainboard, I'll get this cooler for my old mainboard and use it as a server or mount it to a TV: https://www.coolermaster.com/catalog/cases/mainboard-case/fr...

The fact that traditional parts makers like Cooler Master are putting out Framework cases and such bodes really well, I reckon. There are few things I've bought that produce the opposite of buyer's remorse, and my Framework is at the top of the list.

Re: Check if your IKEA chair is compatible with your screen

#177

Had a similar issue with a previous standing desk: turning the motor on to adjust the height of the desk would turn on the RGBs on my keyboard (which uses a skeleton-like structure, so you can see the wires), though not always. After some trial and error I determined the motor likely produces enough interference to trigger the RGBs to turn on. I ended up just cutting the RGB cables because I didn't use them anyway, a…

Likely it was a DC motor, driven by an H bridge. Some of the induction kickback diodes are gone, if so the driving transistors may give the ghost as well.

Re: Check if your IKEA chair is compatible with your screen

#178
Had the same issue as well. Dry air in the apartment and flickering screen when interacting with an IKEA chair.

Solved by adding a "tail" to my chair using a piece of old speaker cable. There is a metal part on the bottom of the chair that the tail can be attached to.

Re: Check if your IKEA chair is compatible with your screen

#179

I once had the problem that running make with too many parallel jobs (-j) would change my keyboard layout. The machine was some laptop mainboard glued to the backside of my monitor, and the USB socket came out at the top of the mainboard. On its way down, the USB cable for the keyboard passed across the whole mainboard. On high load, the mainboard created enough interference to cause the connection to reset, re-hotpl…

This is the greatest thing I've read today. I love when software and the real world have entirely unexpected interactions. And by love, I usually mean hate, especially when I'm the one that has to debug them.

I remember a story about a car that consistently refused to start after a family went to the store to buy vanilla ice cream but it worked fine when they bought chocolate ice cream. (My apologies for any inaccuracies in my recollection of it). They had a manufacturer engineer verify it happened even.

Turned out to be an overheating issue. The chocolate ice cream was at the back of the store while the vanilla ice cream was at the front, effectively changing how much time the car had to cool down properly before attempting to start it again.

Re: Check if your IKEA chair is compatible with your screen

#180

Earlier quoted context omitted.

my favorite story on this is a town in north east usa changed it's traffic lights from energy wasting old fashion lights to new fancy low energy lights. The unexpected result: in winter time these lights did not melt the snow away and the lights were opaque with white snow.

Technology Connections did an episode on this kind of stuff. GE just installs heaters in their streetlights now.

Heaters plus LED light… reminds me of technology where you get both at once!
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