1. The UEFI BIOS on this machine does not have an option to disable
symmetric multi threading.
2. The machine has experienced intermittent hangs/freezes from the
time it was built and commissioned about 2 years ago.
3. All installNN.img files listed below, were successfully installed
(not upgraded) in the order shown. All hang before reaching the
login prompt, each time they are booted.
All NN digits are those of the GENERIC.MP snapshot.
- install75.img # snapshot 47
- install75.img # snapshot 49
- install75.img # snapshot 52
- install75.img # snapshot 53
- install75.img # snapshot 56
The last displayed boot line on each boot was:
root on sd0a (A16digitNUM.a) swap on sd0b dump on sd0b
About 90 seconds later the machine's fans greatly increase speed
and the console screen goes black and blank.
4. Using shell access from the install75.img USB flash drive to the
installed file system provides no useful information e.g.:
- there are no files in /var/run;
- the only file in and below /var/log that has >0 bytes is
install.resp.7490;
- and (of course) /usr/src is empty;
- sysctl kern.version displays ... 7.5 (RAMDISK_CD) #nn ... .
Shell access was useful, to change /etc/ttys tty000 entry to enable
the machine to be configured as a serial server on the next boot.
5. Suggestions as to how extra helpful information could be obtained
are welcome.
6. Serial Console Info, and OpenBSD 7.4 dmesg.boot
Output has been captured via a serial console from the problem machine
from each of the installed snapshots on a subsequent cold boot. Each
set of captured information has shown that the machine has stopped at:
smu7_powergate_uvd+0x23: movb %dh,0xdb9(%rax)
Other captured information from each of the snapshots is almost
identical.
The following set of captured information is from the last snapshot
installed on the machine. It is followed by dmesg.boot from a
previously installed working 7.4 snapshot.
The captured information plus the 7.4 snapshot are deliberately not
included in this post as this email would be > 83k bytes.
My question is: should I send everything to b...@openbsd.org?
--
aer
