Looks like this was actually a bug in the i915 module:
https://gitlab.freedesktop.org/drm/intel/-/issues/2905 There is a linked issue #2923 "deadlock in intel_atomic_cleanup_work (kernel 5.10.5)" that seems to fit the descriptions in this thread here.After upgrading to a custom 5.10.17 kernel, I don't seem to experience the same issue anymore while still using the intel Xorg driver.
I agree that this report could be closed now.Cheers and thanks for keeping the intel driver alive, still performs significantly better on my particular system than the modesetting driver!
-- Jörg Mechnich Stellv. Abteilungsleitung Digitale Bibliotheksdienste Universität Mannheim Universitätsbibliothek Schloss Schneckenhof West, SN281, 68131 Mannheim Tel: +49 621 181-2965 E-Mail: joerg.mechn...@bib.uni-mannheim.de
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