Broadcom NetXtreme BCM5762 Gigabit Ethernet disconnects after a while

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.