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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?

Kaz Miller
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3 Answers3

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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.

Kaz Miller
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great workaround ! It works on my HP Elitedesk 705 G1 SFF Linux Mint 19.3 as well.

Network:   Device-1: Broadcom and subsidiaries NetXtreme BCM5762 Gigabit Ethernet PCIe 
       vendor: Hewlett-Packard driver: tg3 v: 3.137 port: f100 bus ID: 03:00.0 
       chip ID: 14e4:1687 
       IF: eno1 state: up speed: 1000 Mbps duplex: full mac: <filter>

You made my day, now I can finally get rid of my USB-Ethernet adaptor. ! Thanks !

Michael
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Workaround worked for one hour or so, and suddenly stopped. "No connection" - "Cable unplugged", which isn't the case. Rebooting the workstation fixes this issue. So small improvement (at least it works for a while), but no stable solution yet.

Michael
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