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authorChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:07 +0200
committerChristian Krinitsin <mail@krinitsin.com>2025-05-30 16:52:17 +0200
commit9260319e7411ff8281700a532caa436f40120ec4 (patch)
tree2f6bfe5f3458dd49d328d3a9eb508595450adec0 /gitlab/issues_text/target_missing/host_missing/accel_missing/2948
parent225caa38269323af1bfc2daadff5ec8bd930747f (diff)
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+-display sdl causes mice with relative movement to read garbage offsets
+Description of problem:
+`-device virtio-mouse` and `-device usb-mouse` (and probably other mice which send relative mouse movement data) are behaving incorrectly under linux guest and jitter a lot. In this specific case it only seems to happen with `-display sdl` as I could not reproduce this same issue with other of the following configurations: `-display gtk` and `-display spice-app` running with virt-viewer.
+This behavior is not present when running a Windows guest with the same configuration using `-display sdl`
+
+Another weird side note: this behavior is less apparent when running `evtest` on the exact mouse device having issues.
+
+![Video_2025-05-05_20-11-56](/uploads/589d74106d2e9bb5713234de451f5326/Video_2025-05-05_20-11-56.mp4)
+Steps to reproduce:
+1. Install guest operating system
+2. Install gnome metapackage and enable GDM
+3. Reboot
+4. The mouse shows jittery motion on the GDM screen.