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2026-02-14 - AMD DRM on X with high mouse poll rate freezes/stutters


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2026-02-14 - AMD DRM on X with high mouse poll rate freezes/stutters with high Xorg CPU usage and Xorg log message: "event4 - Logitech G305: SYN_DROPPED event - some input events have been lost." when moving the cursor. Evidence can be seen starting around 0:24 into the video.

My versions:

X.Org X Server 1.21.1.21
modeset(0): glamor X acceleration enabled on AMD Radeon RX 9070 XT (radeonsi, gfx1201, LLVM 21.1.6, DRM 3.64, 6.18.9-zen1-2-zen)

Related issues and comments:

https://gitlab.freedesktop.org/drm/amd/-/issues/3709
https://gitlab.freedesktop.org/drm/amd/-/issues/3709#note_3278702

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