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== mouse lag problem ==I've run into this before, and this fixed it for me. However, I've just changed this back to the original state, and it doesn't seem to be re-appearing. Perhaps it has been made moot by an upgrade -- but here's the process I used to fix it.If you are running into the problem now, and just want to test real quick if this fix works, you can do the temporary: sudo sh -c 'echo N > /sys/module/drm_kms_helper/parameters/poll'To keep this change, do: sudo sh -c 'echo "options drm_kms_helper poll=0" >> /etc/modprobe.d/local.conf' sudo update-initramfs -u