I've had the same problem - no Ctrl keys working in Remmina and in VirtualBox
as well. Now Ctrl works again in both applications after I disabled the "mouse
ping" function:
System -> Preferences -> Mouse -> Show position of pointer when Ctrl key is
pressed in the host
Found the soulution here -
Failure to start kvm can also be caused by VirtualBox running on the
host - watch out for dmesg like:
kvm: enabling virtualization on CPU3 failed
kvm: enabling virtualization on CPU0 failed
kvm: enabling virtualization on CPU2 failed
kvm: enabling virtualization on CPU1 failed
to fix it:
# /etc/i
I had to reboot regularly after a few days because of this problem.
dbus-daemon took 100% CPU with "too many open files" (strace) and dbus
communication came to a halt.
Like Warren Jones mentioned in https://bugs.kde.org/show_bug.cgi?id=261180#c4
dbus-daemon as well as "kpackagekitsmarticon" have
