All, First an apology for being "dark" for so long. There are still a few of us out here using Alpha computers... Another apology for the crappy "bug report" that follows, but first, a little background information. I'm not in the habit of running X11 on my PWS 433au these days, except for periodically verifying "lightdm" and "afterstep" still work. The natural order of things is "increased bloat over time", and the elephant barely walks these days, much less dances, i.e., even an extremely lightweight window manager like AfterStep is barely usable on my PWS. Everything worked as well as it's going to for kernel versions up through v5.10.0. When I boot on v5.11.0, "lightdm" starts, the screen goes blank as usual, I get a mouse pointer as usual, and shortly after that, the system locks up solid (completely nonresponsive except for being able to ping it -- can't login remotely). Recovery is via the reset switch at that point :-(. It doesn't seem to be a userspace problem: rebooting the system on the old v5.10.0 kernel works fine. Nothing is showing up in any of the system logs, unfortunately, so I'm at a loss how to troubleshoot this further. The PWS has the same Radeon 7500 video card in it that I've had for years. Any ideas/help appreciated, as always. In the meantime, my default strategy is to press on with trying the v5.12 release candidates (standard kernel.org source tree). Respectfully, --Bob