usb device makes system reboot

Vieri · l33t Joined: 18 Dec 2005 Posts: 908

Hi,

When inserting the following USB device the Gentoo system reboots immediately. No relevant info in /var/log/messages or dmesg.
This does not always happen. In my case, the device has been inserted, removed twice and finally on the last physical connection, the system rebooted.

eccerr0r · Posted: Mon Jan 31, 2022 6:19 pm Post subject:

Does it reboot if you plug it into an external hub that's plugged into the computer?

Is it a real or fake FT232? Heard that FT232s were cloned a lot to keep driver development costs down. While not a problem for Linux, it does mean compromises were made...
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Banana · Posted: Mon Jan 31, 2022 6:26 pm Post subject:

Does this happen with other USB devices, too?
DIes this happen in windows?
Is it an old devide or malfunction USB connector which could lead to a restart?
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Hu · Administrator Joined: 06 Mar 2007 Posts: 23103

Does this happen if the system is sitting at a BIOS/bootloader prompt when you plug in the device? I had this happen once, with a USB mass storage device from a coworker. I plugged it into a discount quality tower, and the resulting short rebooted the system.

eccerr0r · Posted: Mon Jan 31, 2022 7:16 pm Post subject:

I definitely know one of my computers has that issue, if I have any static charge on me and I try to connect a USB device to its front panel USB connectors, it will instantly crash/reboot. Does not matter what device it is, I don't even have to fully plug it in.
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figueroa · Posted: Tue Feb 01, 2022 4:37 am Post subject:

My HP Laserjet 3055 once failed in such a way that leaving it connected to a USB port prevented the computer (the one in my sig) from posting. Once I power cycled the printer, all was well. A failing or bad USB device can do a lot.
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Vieri · l33t Joined: 18 Dec 2005 Posts: 908

I tried connecting and disconnecting multiple times on another machine with 5.4.0-90-generic #101-Ubuntu , but it did not make the host reboot.
I wonder at this point if its a kernel module issue.

The Ubuntu computer is an IBM Thinkpad.
The machine that is being rebooted unwillingly is a Supermicro server (front panel USB).

Hu · Administrator Joined: 06 Mar 2007 Posts: 23103

Most of the machines I had access to at that job did not reboot when given that USB key, which is why my coworker thought nothing of giving it to me. One machine did reboot when given that USB key. Therefore, testing your key on different hardware does not prove anything. That is why I asked if you also see the reboot when the affected machine is waiting at a BIOS prompt. The BIOS is not Linux (usually), so if this USB key can reboot at BIOS, then you do not have a kernel problem. You have a hardware problem.

Vieri · l33t Joined: 18 Dec 2005 Posts: 908