USB-C Monitors Connected to a Thunderbolt Port Have No Video in Ubuntu
Summary: Information about no video in the Ubuntu operating system when a USB-C monitor is connected to a Thunderbolt port.
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Symptoms
After booting into Ubuntu, unplugging a USB-C monitor that is connected to a Thunderbolt port and then plugging the monitor back in does not show any video on the monitor.
This issue happens only when the display mode is changed to Hybrid Discrete Mode in the BIOS.
Cause
There is an issue in Ubuntu that causes the discrete graphics (GPU) to not wake up properly after unplugging the monitor from the Thunderbolt port.
Resolution
Canonical has released an update to the Ubuntu operating system. Updating the Ubuntu operating system resolves the issue.
Affected Products
Precision 7680, Precision 7780Article Properties
Article Number: 000212717
Article Type: Solution
Last Modified: 18 Apr 2025
Version: 4
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