I experienced the same issue with Ryzen 5 1600 and Ryzen 7 1700, with AsRock
AB350M PRO4 and Asus Prime B350M-A.
I try with ubuntu 16.04 normal and hwe kernel, and ubuntu 17.10.
On the system with Asus motherboard, I found a detailed log:
Dec 19 06:25:04 am02 kernel: [227622.995187] NMI watchdog
I have a same issue with GA-AB350-Gaming3 and Ryzen 1600.
It's sad Gigabyte response, now I buy a new AsRock AB350M Pro4, and in the
future I don't chose gigabyte.
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I report this bug on freedesktop.org (I observe this problem only in Calc and
ubuntu, in windows works fine, I don't try in another linux distributions):
https://bugs.freedesktop.org/show_bug.cgi?id=42466
Description:
1. Create a new document in calc
2. Copy cell A1 with ctrl+c, and paste it in A
