Seems fixed in 5.11.0-37-generic
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https://bugs.launchpad.net/bugs/1939297
Title:
External monitors are black (connected through USB-C hub)
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Public bug reported:
After upgrading the kernel from 5.8 to 5.11 (5.11.0-25-generic),
external monitors (both HDMI and DP) connected through USB-C hub
(ThinkPad Thunderbolt 3 Dock Gen 2) do not function properly. I can see
them in the Displays settings utility, but they are not receiving any
signa
