Ubuntu – Broadcom NetXtreme BCM5762 Gigabit Ethernet disconnects after a while


I have a HP EliteDesk 705 G1 with Ubuntu 2020 and the ethernet connection disconnects after a few minutes using it.

I tried what these other questions suggest with no success.

Machine info:

HP EliteDesk 705 G1 SFF
Ethernet controller: Broadcom Inc. and subsidiaries NetXtreme BCM5762 Gigabit Ethernet PCIe (rev 10)

Any ideas?

Best Answer

  • After a deep research my workaround is to add a kernel parameter.

    Here's what I did:

    1. Edit file on /etc/default/grub
    2. Add the kernel parameter iommu=pt. Example: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash iommu=pt"
    3. Save file and apply changes with sudo update-grub
    4. Reboot machine.

    Hope helps someone.