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codebrewer
1 Copper

Precision 5520 Firmware 0.1.7.1 broke TB16

After having a mostly functional TB16 dock with Preciiosn 5520 (Ubuntu 16.04), I'm back to a crippled system. I believe the culprit was the update to firmware 0.1.7.1. USB and networking are both broken...  Any help with troubleshooting would be greatly appreciated.

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3 Replies
rboerner
1 Nickel

Re: Precision 5520 Firmware 0.1.7.1 broke TB16

If you temporarily disable Thunderbolt 3 security within the BIOS, does that help?

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grdnr
1 Copper

Re: Precision 5520 Firmware 0.1.7.1 broke TB16

Same for me. Had a perfectly working Dell 5520 + TB16 dock running Ubuntu 18.04. The firmware update has broken my external monitor. Ethernet etc are fine, it's just the external display via display port that won't work.

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grdnr
1 Copper

Re: Precision 5520 Firmware 0.1.7.1 broke TB16

Unfortunately disabling thunderbolt security in BIOS  doesn't help.

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