On 3/1/19 11:29 AM, J. P. Gilliver (John) wrote:
In message , T writes:
On 2/27/19 4:23 PM, J. P. Gilliver (John) wrote:
Yes: when this problem manifests itself, I've found plugging in a USB
keyboard makes no difference - or even using the on-screen keyboard!
What's more, the problem/behaviour seems to have come across from my
WindowsÂ*XPÂ*machine!!

Was the old keyboard unplugged when you tested?

Both machines were/are laptops! (Well, the XP was a netbook.)
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Try with a Live USB/CD/DVD. That will isolate software from hardware

https://spins.fedoraproject.org/xfce/

It can be cut with dd to a flash drive