Usb devices disconnecting randomly? causing system to reboot

Capzay · 2025-06-29 10:01:29

Not sure if i did, but now that my arch system is no longer installed. How could i do this on the installation media? as obviously, the issues of cold rebooting appeared even when trying to install arch, which made it so difficult.

seth · 2025-06-29 10:23:16

You can add kernel parameters at the bootloader of the install iso just as much.
The entire math there boils down to "rcu_nocbs=0-x" where "x" is the amount of cores you have (so if you've 4 physical cores and hyperthreading "rcu_nocbs=0-7" (2*4-1), on 16 cores "rcu_nocbs=0-15" etc et pp.

Capzay · 2025-06-29 10:32:40

Sorry, i dont fully understand that. Heres what windows displays as my cpu info https://drive.google.com/file/d/1b18jCq … sp=sharing

on another note, It says the base speed is 3.90Ghz, but its running at 4.23Ghz on windows, and in the first post of this forum fastfetch said its running at 4.56 GHz. I dont remember Overclocking my cpu, could that be an issue?

seth · 2025-06-29 15:05:13

"rcu_nocbs=0-15" - you've 8 physical cores + hyperthreading

could that be an issue?

"Could."
https://wiki.archlinux.org/title/CPU_fr … requencies
https://wiki.archlinux.org/title/CPU_fr … amd_pstate
https://wiki.archlinux.org/title/CPU_fr … _governors

The "normal" problem is that the CPU is "too cold" resulting in more turbo activation and the higher frequencies make it unstable (and adjusting PBO to feed more power to the CPU raises its temperature, lowering its inclination to turbo)

Capzay · 2025-06-29 18:30:02

rcu_nocbs=0-15

didnt work, but i noticed something booting back into it after:

during the booting sequence, the ports were disabled again, and i saw iirc, it wanted to reboot but said "yeah, but im kinda in the middle of something" and put it on pause, then i booted. and then nothing worked and eventually shut off

seth · 2025-06-29 20:39:33

Does the kernel parameter "maxcpus=1" help anything?

Capzay · 2025-07-02 12:26:31

Tried it with "maxcpus=1" and "rcu_nocbs=0-15", nothing helped

seth · 2025-07-02 12:51:00

CPU: AMD Ryzen 7 3800X (16) @ 4.56 GHz

so instead i set the CPU 1.80 Voltage bios setting to/from:
Auto > 1.85000 - didnt work
1.85000 > 1.80000 - didnt work

I just googled the CPU, the voltage range seems to be 0.9V-1.5V w/ 1.35V standard.
Are you or the board seriously overvolting the CPU??

Capzay · 2025-07-02 23:16:56

Are you or the board seriously overvolting the CPU??

Not that im aware of, my motherboard is the ASUS PRIME X570-P for all i know.

My BIOS settings are as they are when i clear CMOS

LuxFerre · 2025-07-02 23:33:10

Capzay wrote:

and i couldn't use the AMD curve optimiser as apparently it isnt for my generation of CPU
so instead i set the CPU 1.80 Voltage bios setting to/from:
Auto > 1.85000 - didnt work
1.85000 > 1.80000 - didnt work
but it makes sense you bringing that up, all my usb ports tend to get disabled then it will reboot. So it definitely isnt a usb issue. And when testing it crashed just loading a page on firefox....

You mean the vcore? With a voltage crazy high like that it's no wonder it crashes all the time, you could fry eggs in that thing

Do not change voltages from auto into random values, especially not to max values! Please research first what are safe limits for your cpu, or just leave at auto and it should work fine. Chances are the problem is elsewhere. (or, if it did boot with a vcore of 1.8 maybe your cpu is fried already... does it also crash in windows?)

seth · 2025-07-03 06:27:37

What are your options reg. the voltage configuration? Presets and ranges.
You can just enter the UEFI config section, make a photo of the screen and link that here.

Arch Linux

#76 2025-06-29 10:01:29

Re: Usb devices disconnecting randomly? causing system to reboot

#77 2025-06-29 10:23:16

Re: Usb devices disconnecting randomly? causing system to reboot

#78 2025-06-29 10:32:40

Re: Usb devices disconnecting randomly? causing system to reboot

#79 2025-06-29 15:05:13

Re: Usb devices disconnecting randomly? causing system to reboot

#80 2025-06-29 18:30:02

Re: Usb devices disconnecting randomly? causing system to reboot

#81 2025-06-29 20:39:33

Re: Usb devices disconnecting randomly? causing system to reboot

#82 2025-07-02 12:26:31

Re: Usb devices disconnecting randomly? causing system to reboot

#83 2025-07-02 12:51:00

Re: Usb devices disconnecting randomly? causing system to reboot

#84 2025-07-02 23:16:56

Re: Usb devices disconnecting randomly? causing system to reboot

#85 2025-07-02 23:33:10

Re: Usb devices disconnecting randomly? causing system to reboot

#86 2025-07-03 06:27:37

Re: Usb devices disconnecting randomly? causing system to reboot

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