i've installed lsb_release -rd Description: Fedora release 34 (Thirty Four) Release: 34 uname -rm 5.12.13-300.fc34.x86_64 x86_64 on older h/w dmidecode ... Base Board Information Manufacturer: ASRock Product Name: J1900D2Y ... Processor Information ... Version: Intel(R) Celeron(R) CPU J1900 @ 1.99GHz booting EFI, tree /sys/firmware/efi -L 1 /sys/firmware/efi ├── config_table ├── efivars ├── fw_platform_size ├── fw_vendor ├── mok-variables ├── runtime ├── runtime-map └── systab it cold-boots normally; all runtime OS operations are good. acpi/reboot is set in kernel config as dmesg ... [ 0.244590] Kernel command line: ... acpi=force reboot=acpi ... ... on shutdown, shutdown -r now @ serial output ... [ OK ] Reached target Shutdown. [ OK ] Reached target Final Step. [ OK ] Finished Reboot. [ OK ] Reached target Reboot. dracut Warning: Killing all remaining processes dracut Warning: Unmounted /oldroot. mdadm: stopped /dev/md1 Rebooting. [ 114.398904] reboot: Restarting system [ 114.398904] reboot: Restarting system after ~ 15 seconds, it (reboots) next, the boot sequence, reaches ... grub menu; @ timeout, proceeds with default selection then screen blanks system quietly freezes -- no add'l serial output OTOH, if I immediately recover with IPMI System Reset (reboots) boot completes, with no error/freeze. suspecting that the difference between the two reboot cases might be a cold reboot in the IPMI-reset case, I changed kernel config - acpi=force reboot=acpi + reboot=cold unfortunately to no avail; same symptom -- freeze after grub after exec of `shutdown -r now` since this *IS* rebooting, but freezing after grub menu, I'm not at all convinced this *is* acpi-related. any ideas/suggestions as to source of the problem, or specific diags/logging to dig into?
