If you've been playing with the bios there can be all kinds of problems, I've learned this through trial and error (knowing i was learning and likely to learn by experiance). I'd suggest resetting the bios to "Optimal" or whatever your' bios calls it and seeing if that solves it. You may have to change the bios in terms of boot drive and possibly other settings, but best to change as little as possible.
I assume this machine previously worked well? have you tried booting from an optical drive or thumb drive with another os or utilities disk to eliminate kernel issues?
finally, if it worked till recently you could have a dying pci card in which case you'll have to try pulling them all out (other than graphics if it's not built in) and then reinstalling one card at a time, rebooting to see if things have changed.
failing that, you might rebuild the kernel just in case that was corrupted in some way. A lot of subtle hardware problems can corrupt the compiler but not show up in less intensive use.
especially when learning, it's best to change one thing at a time, reboot and see what happens. this way if something breaks you know it was probably your' last change. I hope this is useful to you. It is also always a good idea to ask others who may see what we ourselves are not seeing. Trouble shooting can be very difficult and not everyone is good at it but most can get a lot better with practice and patience.
Democracynow.org
27. Sep 2018 16:02 by michaelkintzios@gmail.com:
On Thursday, 27 September 2018 21:51:42 BST Håkon Alstadheim wrote:(Sorry for the OT, don't know where to go for generic hardware questions)
I'm wondering if my main board dying? On sept. 1 I started getting error
messages like the ones at the end of this mail. I just noticed them. I
am including logs from as far back as I have, just for completeness.
This mainboard:
# smbios-sys-info
Libsmbios version: 2.3.2
Product Name: Z10PE-D8 WS
Vendor: ASUSTeK COMPUTER INC.
BIOS Version: 3703
... has given me a lot of grief, so I've been mucking about with it
quite a lot. I don't know if I did anything on september 1. Could it be
some bios-setting I've changed, or som firmware corruption ? Other
weirdness happening recently is sensors have started having episodes of
all values totally bogus, and one pwm fan-sensor seems to be permanently
slightly loony.
OS running is kept up-to-date ~amd64 gentoo-sources running as Dom0
under Xen-4.11 latest.
------------------
0:root@gentoo log # zgrep 'pcieport 0000:00:03.0' kern.log* | sed -e
's/^[^:]*://' | sort -M
Aug 19 19:38:55 gentoo kernel: [ 1.181466] pcieport 0000:00:03.0: AER
enabled with IRQ 134
Aug 19 19:38:55 gentoo kernel: [ 1.181700] pcieport 0000:00:03.0:
Signaling PME with IRQ 134
Did you enable CONFIG_PCIEAER_INJECT in your kernel?
What do you get when you boot with the kernel option:
pcie_ports=auto
--
Regards,
Mick