Obviously, I did not precise that it happened after adding a firewire card on
the PCIE-1 slot. I also did a system upgrade at the same time.
After removing the firewire extension card, well, the problem persisted.
I notice that this box would resume normally if it is suspended in a virtual
terminal. And I recalled I had a similar problem on my laptop.
I dropped this script in /usr/lib/systemd/system-sleep/ :
#!/bin/bash
if [ "$1" = "pre" ];then
chvt 2
fi
if [ "$1" = "post" ];then
chvt 1
fi
exit 0
The machine would then resume in KDE, after switching to a virtual terminal
with no $DISPLAY on suspend, and back to VT 1 on resume. It does so with the
firewire extension card back in place also.
This seems to be related to KDE, and not the presence of a firewire card in the
box.
Sorry to have bothered you.
Happy New Year !
