I am trying OpenBSD 7.0 again (now that I have an AMD video card). I'll follow up with sendbug(1) and would be happy to work with someone to troubleshoot if this is of interest to anyone. I didn't see an amdgpu(4) update in -current at https://www.openbsd.org/plus.html but I can switch to -current if needed.
MB: ASUS Prime X570-P Video Card: GIGABYTE Radeon RX 5700 XT GAMING OC 8G The issue is with a fresh install of 7.0 as the only OS, then running syspatch(8) to get/apply amdgpu(4). No additional packages have been installed yet. The 5K (5120x2880) Dell UP2715Kt display, connected via dual displayport connectors brought up the GUI login screen, and after login, the default gray background screen with the virtual desktop switcher visible in the lower right corner. The expected XTerm window does not appear. Left clicking on the screen brings up the Fvwm root menu, but selecting one of the applications (e.g. XTerm, Top, etc.) causes the GUI to be "stuck" (no mouse pointer, no interaction seems to work, and no new windows open, and the Fvwm doesn't open again). The OS appears to be running fine - I can SSH in from another system, and ultimately reboot via the SSH connection. Prior to running syspatch to get amdgpu(4), the Dell monitor worked when connected via dual displayport at a lower resolution (I didn't check what the resolution was at the time, but it was possibly 1920x1080), so the issue isn't simply having two DP cables connected. After syspatch, the Dell monitor connected via single display port has a 4K resolution (as expected, since 5K is only expected to be supported over a dual DP connection), and works at 4K (Xterm displays on login, additional windows open from Fvwm menu). Swapping with a different monitor also works via single displayport (Asus PA279Q, 2560x1440), so this issue is specific to the use of dual displayport to connect a single monitor trying to run 5K resolution. It is likely limited to something in amdgpu(4), X.org(1), or the window manager. Xorg.0.log suggested that the sysctl(1) 'machdep.allowaperture=1' was needed, but that did not resolve the 5K issue, and was not actually needed for 4K to work, either (I tried =1, =2, and the default =0). Further troubleshooting may require comparative review of /var/log/Xorg.0.log and dmesg(8) with single vs. dual displayport connections, and figuring out what is actually "stuck" in the window manager, as I was not checking the status of processes at this point. Overall, since >4K monitors via dual displayport aren't mainstream, and probably won't be anytime soon, this is at most a minor issue. My future troubleshooting plan at this point is to try up to several of the window managers conveniently available as OpenBSD packages since the issue may be window manager-specific. If those don't resolve the issue, then I would just use a single DP connection and continue learning more about OpenBSD on the desktop in 4K or lower resolution. Thanks, Phillip Vuchetich email: p...@vuchetich.com mastodon: @philvuchetich@bsd.network
