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This happens after 3-4 days of running the server, then I have to restart it manually. (discuss.tchncs.de)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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I bought an Optiplex 5040, with an i5-6500TE, and 8 GB DDR3L RAM.

When I bought it, I installed Fedora Server on it. It got stuck every few days but I could never see the error. The services just stopped working, I couldn't ssh into it, and connecting it to a monitor showed a black screen.

So, I thought let's install Ubuntu Server, maybe Fedora isn't compatible with all of its hardware. The same thing is happening, now, but I can see this error. Even when there's nothing installed on it, no containers, nothing other than base packages, this happens.

I have updated the bios. I have tried setting nouveau.modeset=0 in the grub config file. I have tried disabling and enabling c-states. No luck till now.

Would really appreciate if anyone helps me with this.

UPDATE:

I cleaned everything and reapplied the thermal paste. I did not see any change in the thermals. It never goes over 55°C even under full load.
I reset the motherboard by removing that jumper thing.
I ran memtest86, which took over 2½ hours. It did not show any errors.
I ran a CPU stress test for over 15 hours, and nothing crashed.
I also ran the Dell's diagnostic tool, available in the boot menu of the motherboard. The whole test took over 2 hours but did not show any errors. It tested the memory, CPU, fans, storage drives, etc.

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[–] [email protected] 9 points 3 months ago* (last edited 3 months ago)

Can you sudo dmesg | grep microcode and see if you have any errors?

If so, I'd be inclined to sudo dnf reinstall microcode_ctl then do a sudo dracut -f to regenerate the initramfs, and reboot. Be sure to have a working fallback kernel like LTS installed so you can recover if need be.

Edit: I just read you changed to Ubuntu. I can't be arsed to figure out how Ubuntu does this stuff so that's on you to figure out. Alternatively, install Arch and use intel-ucode package.