Corsair K90 stuck keys !firmware bug! (not physically stuck)

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taltamir

taltamir

Lifer
Mar 21, 2004
13,576
6
76
I have splurged and bought the very expensive Corsair K90 keyboard.
http://www.anandtech.com/show/5548/capsule-review-corsairs-vengeance-k60-and-k90-keyboards

I encountered a very odd firmware bug in it. It will occasionally (once every few days) have a key get "stuck" as if being held down. However the key is NOT physically jammed.

-When this occurs the keyboard will continue to send this keypress signal continuously until ANY key is pressed. That means that if the F3 key is "firmware stuck" then I can press the spacebar and it will unstuck it (this makes it hard to detect as rapid typing can hide this effect as you unstuck a key before it is noticed).
-I have seen it happen for a variety of letter keys, space bar, enter, and F keys.
-There is absolutely no indication of there being any physical issue
all the above combined suggest to me that this is a firmware issue.

I have tried updating the firmware and driver (as per instruction from their customer support).

Now, several months after I bought the keyboard my space bar key broke. I got the keyboard replaced under warranty... The new one they sent me has the exact same issue with the "firmware stuck" keys.
I also updated it to firmware 1.19 and it has the same issue.

I was wondering if other people are experiencing the same issue and how common it is. There was no indication of such a defect in the anandtech review of the keyboard (which is really what sold me on it).
 
Last edited:
C

C1

Platinum Member
Feb 21, 2008
2,375
111
106
I suppose there's an outside chance that there is something in the keyboard that is sticking (eg, a membrane switch under the physical key). When the stuck character happens, instead of pressing on another key, just tap the frame of the keyboard (or turn it upside down and tap the KB body) to see if the stuck character clears. If it clears then demand a KB replacement otherwise perhaps a firmware update may just be needed.
 
taltamir

taltamir

Lifer
Mar 21, 2004
13,576
6
76
C1 said:
I suppose there's an outside chance that there is something in the keyboard that is sticking (eg, a membrane switch under the physical key). When the stuck character happens, instead of pressing on another key, just tap the frame of the keyboard (or turn it upside down and tap the KB body) to see if the stuck character clears. If it clears then demand a KB replacement otherwise perhaps a firmware update may just be needed.
Click to expand...

Hi, thanks for the reply.

1. Already got a replacement keyboard and its doing the same.
2. Already updated firmware and it didn't solve the issue on either keyboard
3. There is no membrane, this keyboard has mechanical keys
http://www.pcworld.com/article/242037/mechanical_keyboard_faq_pick_the_right_switch.html
4. I don't think its a physically stuck key. The press rate is too slow for just holding down a key (although its still multiple presses per second) and a light press on a DIFFERENT key ALWAYS causes it to get unstuck.
 
G

Getting better

Junior Member
May 8, 2013
1
0
0
Re: K90. I've had three.
Number one had a key that would not work
Number two had the sticky key issue so they sent a new one.
Number three has the sticky key issue. Quite upsetting when you are editing and press the back space key only to have it erase lines of data.
I've updated the firmware. Still acts as if the key is stuck but it isn't stuck, it just remains activated. Hoping they will come out with a fix before I have to purchase another brand.
 
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