The propagation of kernel 4.16.12 from Sid to Buster has greatly improved this situation, i.e., no lock ups so far (uptime approaching 3 days since I switched to 4.16.12 from 4.16.5) and may have completely solved it. For further details see <https://bugs.freedesktop.org/show_bug.cgi?id=106671>.
I would like to see what sort of maximum uptime I can now achieve with this card without lock ups and report that here for the benefit of other Debian users of AMD RX 550 graphics cards so please leave this bug open for at least several more months. Alan __________________________ Alan W. Irwin Astronomical research affiliation with Department of Physics and Astronomy, University of Victoria (astrowww.phys.uvic.ca). Programming affiliations with the FreeEOS equation-of-state implementation for stellar interiors (freeeos.sf.net); the Time Ephemerides project (timeephem.sf.net); PLplot scientific plotting software package (plplot.sf.net); the libLASi project (unifont.org/lasi); the Loads of Linux Links project (loll.sf.net); and the Linux Brochure Project (lbproject.sf.net). __________________________ Linux-powered Science __________________________
