Re: How to recover from "Display output is not active"
On Fri, Jun 20, 2025 at 7:35 PM Jeffrey Walton <noloader(a)gmail.com> wrote:
I'm working on Ubuntu 22.04.5, amd64, fully patched. It provides QEMU
1:6.2+dfsg-2ubuntu6.26 and libvirt 8.0.0-1ubuntu7.11.
The problem I am experiencing is, when the host machine blanks the
monitor, I lose the display on the guest when I sit back down at the
computer and wake the monitor. The error message (?) in the guest
window is, "Display output is not active." The condition happens with
both VIRTIO and VGA models. Also see <https://imgur.com/a/tEp73k2>;.
I have not found a workaround to stop it from happening or recover
after it happens. I have to Force Off the VM and then restart the VM
to the display back.
My host power configuration is: disable sleep, suspend, hibernate and
hybrid-sleep via systemd's systemctl. However, I allow the monitor to
be turned off after 15 minutes of inactivity. My guest power
configuration is whatever the distro provides.
Based on my searching, others have experienced the problem. And one
fellow says switching to the VGA model fixed it for him. (But no joy
for me).
Here is the post where the person says VGA fixed it for him:
<https://www.tarball.ca/posts/cockpit-kvm-display-output-is-not-active/>;.
But again, no joy for me.
Does anyone have any suggestions for a work around?
Thanks in advance. (And my apologies if this is the wrong list).
Jeff