Public bug reported:
I'm running Ubuntu 25.04 guest (the machine I'm reporting this ticket
from) on an Ubuntu 25.10 host, via virt-manager/QEMU/KVM. Copy-paste
from guest to host and back works well for ASCII characters, but the
most curious thing happens when I try to copy a non-ASCII text from
guest to host. As an example, I'll copy the "ようこそ" text from
https://ja.wikipedia.org/wiki/%E3%83%A1%E3%82%A4%E3%83%B3%E3%83%9A%E3%83%BC%E3%82%B8
.
1. Copy ようこそ on guest, pasting on guest: works as expected, pastes ようこそ
2. Copy ようこそ on guest, pasting on host: pastes as "\u3088\u3046\u3053\u305d" -
this is the problem.
3. Copy ようこそ on host, pasting on guest: works as expected, pastes ようこそ
Googling/AI search for this particular problem yielded nothing
interesting, except from the information that spice-vdagent may exhibit
these kinds of issues when running under Wayland.
spice-vdagent logs show no errors:
```
systemctl status spice-vdagent
● spice-vdagentd.service - Agent daemon for Spice guests
Loaded: loaded (/usr/lib/systemd/system/spice-vdagentd.service; indirect;
preset: enabled)
Active: active (running) since Mon 2025-10-06 09:39:37 EEST; 7min ago
Invocation: 2418b05b8b664561879fec0eb328aed7
TriggeredBy: ● spice-vdagentd.socket
Process: 2274 ExecStart=/usr/sbin/spice-vdagentd $SPICE_VDAGENTD_EXTRA_ARGS
(code=exited, status=0/SUCCESS)
Main PID: 2283 (spice-vdagentd)
Tasks: 3 (limit: 18404)
Memory: 828K (peak: 1.7M)
CPU: 508ms
CGroup: /system.slice/spice-vdagentd.service
└─2283 /usr/sbin/spice-vdagentd
Oct 06 09:39:37 mavi-bee-vm-base systemd[1]: Starting spice-vdagentd.service -
Agent daemon for Spice guests...
Oct 06 09:39:37 mavi-bee-vm-base (vdagentd)[2274]: spice-vdagentd.service:
Referenced but unset environment variable evaluates to an empty string:
SPICE_VDAGENTD_EXTRA_ARGS
Oct 06 09:39:37 mavi-bee-vm-base spice-vdagentd[2283]: opening vdagent virtio
channel
Oct 06 09:39:37 mavi-bee-vm-base systemd[1]: Started spice-vdagentd.service -
Agent daemon for Spice guests.
Oct 06 09:39:37 mavi-bee-vm-base spice-vdagentd[2283]: Set max clipboard:
104857600
Oct 06 09:39:56 mavi-bee-vm-base spice-vdagentd[2283]: closed vdagent virtio
channel
Oct 06 09:39:57 mavi-bee-vm-base spice-vdagentd[2283]: opening vdagent virtio
channel
Oct 06 09:39:57 mavi-bee-vm-base spice-vdagentd[2283]: Set max clipboard:
104857600
Oct 06 09:39:57 mavi-bee-vm-base spice-vdagentd[2283]: Set max clipboard:
104857600
```
ProblemType: Bug
DistroRelease: Ubuntu 25.04
Package: spice-vdagent 0.22.1-4.1
ProcVersionSignature: Ubuntu 6.14.0-33.33-generic 6.14.11
Uname: Linux 6.14.0-33-generic x86_64
ApportVersion: 2.32.0-0ubuntu5.3
Architecture: amd64
CasperMD5CheckResult: pass
CurrentDesktop: ubuntu:GNOME
Date: Mon Oct 6 09:40:25 2025
InstallationDate: Installed on 2025-10-02 (3 days ago)
InstallationMedia: Ubuntu 25.04 "Plucky Puffin" - Release amd64 (20250415.3)
ProcEnviron:
LANG=en_US.UTF-8
PATH=(custom, no user)
SHELL=/usr/bin/fish
TERM=xterm-256color
XDG_RUNTIME_DIR=<set>
SourcePackage: spice-vdagent
UpgradeStatus: No upgrade log present (probably fresh install)
** Affects: spice-vdagent (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug plucky wayland-session
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https://bugs.launchpad.net/bugs/2126904
Title:
copying non-ASCII characters on guest Ubuntu pastes question marks or
unicode escapes on host Ubuntu
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