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Alberto    0

I have the same issue: both my Win 10 and my Debian Linux laptops do not recognize the MK750 keyboard I just bought.


Once plugged, it does not even lit up. The FN+right ALT and FN+E work (i.e., the LED animation come up, and then the the white flash happens, I guess while the keyboard is reset), but the keyboard is still not usable to type. I also checked (FN+F9) that it was not locked --- but, in my case, I have never been able to use it at all.


I tried a different USB-C cable, and it does not work either.


Cold/warm booting does not make any difference.


I reinstalled Portal 1.01 a few times, it never recognizes the keyboard. Windows shows a "USB Device not recognized" popup windows. I made sure all the USB drivers are up-to-date. I uninstalled the software for another keyboard I have. The MK750 is still not recognized.


On Debian, dmesg reports the following errors:



[ 5.280015] usb 1-2: device not accepting address 4, error -71

[ 5.408082] usb 1-2: new full-speed USB device number 5 using xhci_hcd

[ 5.408242] usb 1-2: Device not responding to setup address.

[ 5.616164] usb 1-2: Device not responding to setup address.

[ 5.824030] usb 1-2: device not accepting address 5, error -71

[ 5.824110] usb usb1-port2: unable to enumerate USB device


I opened a support ticket, I hope someone from Cooler Master will respond soon...


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